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NAS Manager: Dell PowerVault 745N NAS Systems Administrator's Guide

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NAS Manager

Dell™ PowerVault™ 745N NAS Systems Administrator's Guide

  Determining a NAS System's Configuration

  Logging Into the NAS Manager

  Basic Navigation

  Changing the NAS Manager Language

  How to Find Online Help

  Configuring Network Properties

  Creating Local Users and Groups

  Using Shares

  Disk Quotas

  Using Logs

  Shutting Down the NAS System

  Managing Disks and Volumes

  Shadow Copies


The Dell™ PowerVault™ NAS Manager is a Web-based user interface that is the primary tool for configuring NAS systems. This section provides basic information on using the NAS Manager, including how to log on and navigate the interface, configuring network properties and IP addresses, creating users, using shares and disk quotas, and managing disks and volumes.


Determining a NAS System's Configuration

Your NAS system is available from Dell in either a software-RAID, a hardware-RAID, or an external storage configuration. The following is an overview of the types of NAS system configurations:

  • In a software-RAID hard-drive configuration NAS system, the RAID functionality is configured by the Microsoft® Windows® Storage Server 2003 operating system.

  • In a hardware-RAID hard-drive configuration NAS system, the hard drives are controlled by a Cost Effective RAID Controller (CERC)- Serial ATA (SATA) card installed in a PCI expansion slot inside the NAS system.

  • In an external storage configuration, the internal hard drives are controlled by the operating system and the external hard drives are controlled by a Dell PowerEdge™ Expandable RAID Controller (PERC) card in a PCI expansion slot.

NOTE: Although you can change RAID levels on your NAS system, you cannot change the basic configuration of your NAS system. For example, you cannot change a system from a software RAID configuration to a hardware-RAID configuration.

The RAID hard-drive configuration of the NAS system affects some of the NAS Manager configuration procedures. Therefore, determine the RAID configuration of your NAS system before continuing with other sections in this guide.

Use one of the following methods to determine the RAID configuration:

  • Check the RAID hard drive configuration on the NAS system System Version screen.

    1. Log in to the NAS Manager.

See "Logging Into the NAS Manager."

    1. Click Status.

    2. Click System Version.

The System Version screen appears and the Disk Configuration row lists the system as either Hardware RAID, Software RAID, or External Storage.

  • If the system has a CERC-SATA RAID controller card installed in a PCI expansion slot as explained in the Installation and Troubleshooting Guide, the NAS system has hardware RAID. If the system has a PERC card in a PCI expansion slot, the system has external RAID storage. A software-RAID NAS system does not have a RAID controller card installed.

NOTE: If the system has an external RAID connector, the RAID controller card is a PERC card.
NOTE: Your system can have only one RAID controller card in the PCI expansion slots.

Logging Into the NAS Manager

To use the NAS Manager, you must be logged in as an administrator. You can log in only if the NAS system is on the network or if you are connected directly to the NAS system with a keyboard, monitor, and mouse.

Logging Into the NAS Manager on the Network

To connect to the NAS Manager using a secure SSL port, perform the following procedure:

  1. Open a Web browser from a client system.

The NAS Manager supports client systems running Microsoft® Windows® operating systems and Internet Explorer 6.0 or later.

  1. Type https://<system_name>:1279 (where <system_name> is the system's name and 1279 is the secure port) in the Address field in the Web browser, and then press <Enter>.

The default system name is Dellxxxxxxx, where xxxxxxx is the system's service tag number. For example, if your service tag number is 1234567, enter https://DELL1234567:1279.

  1. When the Enter Network Password window displays, type a user name and password and then click OK to log in as the administrator.

NOTE: The NAS Manager default administrator user name is administrator and the default password is powervault.

You are now logged in to the NAS Manager.

Logging Into the NAS Manager Directly on the NAS System

  1. Connect a keyboard, monitor, and mouse to the NAS system.

  2. Turn on the NAS system and log into the system as an administrator.

NOTE: The default administrator user name is administrator and the default password is powervault.
  1. Double-click the NAS Manager icon on the desktop of the NAS system.

NOTE: If you are part of a domain, the NAS Manager icon may not be displayed. To access the NAS Manager, open Internet Explorer and enter http://localhost, and then click the Administer this server link to display the NAS Manager.
  1. When prompted, enter the user name and password.

The default user name and password for the NAS Manager are the same as for the NAS system.

Default Administrator User Name and Password

When logging into the NAS system for the first time, you must enter an administrator user name and password. The default administrator user name for your NAS system is administrator and the default password is powervault.


Basic Navigation

When navigating the NAS Manager, use the buttons within the program instead of the navigation buttons on the Web browser (for example, Back and Forward).

The top of each page of the Web user interface (UI) displays a status area, as well as primary and secondary menu bars, and the body of each page displays specific content related to each functional area.

Primary Menu

The primary menu bar below the status area allows you to choose from the following menu items:

  • Welcome — Allows you to take a tour and set the administrator password, NAS system name, and default page.

  • Status — Provides information about alerts and other status.

  • Network — Provides access to basic network setup tasks such as setting the NAS system name, configuring properties of network interfaces, configuring global network settings, setting IP addresses and ports for the administration website, configuring Telnet, and changing passwords.

  • Disks — Allows you to configure disks and volumes, set disk quotas, and create shadow copies.

  • Users — Enables you to create, edit, and delete local users and groups.

  • Shares — Enables you to manage local folders and create or modify file shares.

  • Maintenance — Allows you to perform maintenance tasks such as backup and restore, apply software updates, check logs, change the language of the NAS Manager, and access the NAS server desktop.

  • Help — Provides access to online Help for network attached storage.


Changing the NAS Manager Language

NOTE: Changing the language used in the NAS Manager also changes the language for the operating system's user interface.

The NAS Manager is available in different languages. To change the NAS Manager language, perform the following steps:

  1. Log in to the NAS Manager.

  2. Click Maintenance.

  3. Click Language.

  4. Click the radio button next to the language you want to use.

  5. Click OK.

  6. Reboot the system when prompted.

The NAS system reboots to complete the operation.

For more information about changing the language settings for the NAS system itself, see "Advanced Features."


How to Find Online Help

The NAS Manager provides two kinds of help. The NAS Manager online help provides information about NAS Manager functionality and procedures. The Microsoft Windows Storage Server 2003 operating system online help, which you can access through the Remote Desktop link on the Maintenance page, documents the functionality of the Windows Storage Server 2003 operating system.

To access NAS Manager Help, use one of the following methods:

  • Click Help on the primary menu; the NAS Manager screen is replaced by a split Help screen that displays a table of contents on the left and topics on the right.

  • Click the question mark icon at the far right of the primary menu to access the context-sensitive help topic related to the current page.

To start Windows Storage Server 2003 help, perform the following steps:

  1. Log in to the NAS Manager.

  2. Click Maintenance.

  3. Click Remote Desktop.

  4. Log in to the NAS system.

NOTE: The default administrative user name is administrator and the default password is powervault.
  1. From the Start menu, click Help and Support.


Configuring Network Properties

Use the Network tab in the NAS Manager to configure the NAS system for the network. This section provides information for setting up your NAS system on the network, including naming the system, defining the IP address, and configuring the NIC.

Default System Name

The default system name is Dellxxxxxxx, where xxxxxxx is the system's service tag number. For example, if your service tag number is 1234567, enter http://DELL1234567.

You can also access the system directly through secure port 1279 by connecting to https://DELLxxxxxxx:1279 where xxxxxxx is the system's service tag number.

Naming the NAS System

By default, the NAS system uses your service tag number as the system name. To change the name of the NAS system, perform the following steps:

  1. Log in to the NAS Manager.

  2. Click Network.

  3. Click Identification.

  4. Type a new name for the NAS system in the Server name field.

  5. If desired, in the DNS suffix field type in the domain information to append to the host name to create the fully qualified machine name.

  6. Click Workgroup or Domain, depending on whether the system will be part of a workgroup or a domain.

  7. If the system is part of a domain, type in the User and Password fields the information for the user who has permission to join the domain.

Include the domain name when you enter the user name (DOMAIN\USER):

  1. Click OK.

  2. Click OK to reboot, or click Cancel.

Until you reboot the system, the new name will not take effect. After rebooting the system, use the new name when you connect to the NAS Manager.

Configuring the Network Address for the NAS System

If you have a DHCP server on your network, you do not need to configure your NAS system's IP address because DHCP automatically assigns an address to the NAS system. If you do not have a DHCP server on your network, you must set the address for the NAS system through the NAS Manager.

NOTE: To configure an IP address for another interface such as DNS, WINS, or AppleTalk, see your NAS Manager online help.
NOTE: Before you configure the IP address, make sure that the NAS system is connected to the network.

To configure the IP address, perform the following steps:

  1. Log in to the NAS Manager.

  2. Click Network, and then click Interfaces.

  3. Select the radio button beside the network connection that you want to configure.

NOTE: If some of the text is missing due to column width, pass your cursor over the text in the column to see a pop-up window with a full description.
  1. Click IP, and select Use the following IP settings.

  2. Enter the desired IP address, subnet mask, and default gateway.

If you do not have this information, contact your system administrator.

  1. Click OK.

The network address setup is complete.

NOTE: When you change the IP address, you may be unable to access the NAS Manager by system name. If this happens, you can also try to access the NAS system by typing http://new_ip_address or https://new_ip_address:1279 in the NAS Manager.

Changing the Administrator Password

  1. Log in to the NAS Manager.

  2. Click Network and click Administrator.

  3. Enter the current user name and password.

  4. Enter the new password in the New password box.

The password must be at least six characters and cannot be blank.

  1. Enter the new password again in the Confirm new password box.

  2. Click OK.

NOTE: If you receive an error message stating that the password or account name cannot be changed for this domain account when trying to change the administrator password or account name, you are logged on as a domain user. You must be logged on as the server administrator to change the administrator password.

Creating Local Users and Groups

A user is a person or group that has access to the shares on the NAS system. You create users after you configure the network properties of your NAS system.

Creating a Local User

NOTE: In a domain environment, you cannot create domain users through the NAS Manager.
  1. Log in to the NAS Manager.

  2. Click Users.

  3. Click Local Users.

  4. On the Local Users on Server page, click New.

  5. Complete the information on the Create New User page.

NOTE: In a domain environment, do not create local users that have the same user name as domain users unless the local user and domain user have identical passwords.

The Home Directory text box specifies a new directory that will be created and to which the user will have exclusive access permission. The directory name is the same as the user name and is located in the path specified.

  1. Click OK.

Creating a Local Group

NOTE: In a domain environment, you cannot create domain groups through the NAS Manager. However, you can add domain users to your local groups.
  1. Log in to the NAS Manager.

  2. Click Users.

  3. Click Local Groups.

  4. On the Local Groups on Server page, click New.

  5. On the Create New Group page, enter the name and description of the group.

  6. Click Members.

  7. Select the members of the group by performing one of the following:

    • In the Add user or group box, select a local user or group from the list, and then click Add.

    • Type the domain and group name (domain\group_name) of a domain group or of a domain user account (domain\user_name) and then click Add.

NOTE: If you are adding a domain group, you must also enter the user name and password that will allow you to add from that domain.
  1. Click OK.


Using Shares

A share is a folder on the NAS system that can be accessed on the network by systems running Windows, Novell® NetWare®, Macintosh, or UNIX® operating systems.

NOTE: You must use the NAS Manager's Remote Desktop to administer NetWare shares. See "Advanced Features" for more information.

A NAS system supports the following methods of sharing folders:

  • DFS — Distributed File System (DFS) makes files that are distributed across multiple servers appear as if they reside in one place on the network.

  • NFS — The Network File System protocol is used by client systems running UNIX.

  • IPX — The Internet Packet Exchange protocol is used by client systems running NetWare. This protocol is not installed by default.

  • FTP — The File Transfer Protocol is an alternative way of accessing a file share from any operating system. This protocol is disabled by default.

  • HTTP — The Hyptertext Transfer Protocol is the protocol for accessing a file share from Web browsers.

  • Microsoft SMB — The Microsoft SMB protocol is used by clients running a Microsoft Windows operating system.

  • AppleTalk — The AppleTalk protocol is used by clients running a Macintosh operating system. This protocol is disabled by default.

Adding a Share

This section does not contain information for creating NetWare shares. For information on creating NetWare shares, see "Sharing Netware Volumes" in "Configuring Systems in a Heterogeneous Environment."

To create a share, you must supply a share name that is different from all other shares on the system. This is the name that the client system uses to access the share. Some protocols also support the inclusion of a comment or brief description of the share. Additionally, you must enable at least one of the available protocols.

NOTICE: It is recommended that you create your data shares on the data drives. Shares that are created on the operating system drive will be deleted if you reinstall the operating system.

To add a share, perform the following steps:

  1. Log in to the NAS Manager.

  2. Click Shares.

  3. On the Shares page, click Shares.

  4. In the Tasks list on the Shared Folders page, click New.

  5. Type the share name and share path.

  6. If you entered a nonexistent folder in the Share path, click Create folder.

  7. Check the appropriate box(es) to specify the types of protocols to enable.

If you want to use a protocol that is grayed out, you must first enable it on the NAS system. See "Advanced Features" for information about enabling the AppleTalk and FTP protocols.

  1. If you want to provide access to the share as part of a Distributed File System (DFS) namespace, select Publish to DFS root: \\servername\root.

For more information about DFS and creating DFS roots, see "Using DFS."

  1. Use the protocol tabs to configure the specific properties of each type of share.

See the context sensitive online help for more information on the properties for each protocol.

  1. Click OK.

Modifying Share Properties

  1. Log in to the NAS Manager.

  2. Click Shares.

  3. On the Shares page, click Shares.

  4. In the Shared Folders table, click the share you want to modify.

  5. Click Properties.

The Share Properties page is displayed. Use this page to change the properties of the share, such as the protocols it supports.

  1. Click OK.

Removing a Share

When you remove a share, the share becomes inaccessible; however, the actual files remain on the NAS system.

To remove a share, perform the following steps:

  1. Log in to the NAS Manager.

  2. Click Shares.

  3. On the Shares page, click Shares.

  4. In the Shared Folders table, click the share that you want to delete.

  5. Click Delete.

A confirmation dialog appears.

  1. Click OK to confirm the deletion, or click Cancel to keep the share.

Removing a Protocol From the Share

Because a share may have more than one protocol assigned, it is possible to remove a protocol from a share without removing the remaining protocols.

To remove one or more specific protocols from a share, perform the following steps:

  1. Log in to the NAS Manager.

  2. Click Shares.

  3. On the Shares page, click Shares.

  4. In the Shared Folders table, click the share for which you want to remove a protocol.

  5. Click Properties.

  6. Uncheck the protocol(s) to remove it from the share.

  7. Click OK to confirm the protocol removal, or click Cancel to keep the protocol(s) for the share.

Publishing a Share in DFS

A DFS namespace provides users with a logical grouping of shared resources that is independent of the resources' locations. Users can access resources without needing to know where the resources reside. In DFS, you can also move a shared folder without affecting users.

To publish a shared folder in DFS, perform the following steps:

  1. Log in to the NAS Manager.

  2. Click Shares.

  3. On the Shares page, click Shares.

  4. In the Shared Folders table, click the share that you want to publish in DFS.

  5. Click Publish in DFS.

  6. In the Publish to DFS root box, type the name of a DFS root.

  7. Click OK.

For more information on DFS, see "Using DFS."


Disk Quotas

Disk quotas track and control the use of disk space for volumes. You can configure the volumes on your NAS system to:

  • Prevent further use of disk space on a volume by a user and log an event when a user exceeds a specified disk space limit.

  • Log an event when a user exceeds a specified disk space warning level.

When you enable disk quotas, you can set both the disk quota limit and the disk quota warning level.

  • The disk quota limit specifies the amount of disk space a user is allocated within a specific volume.

  • The warning level specifies the point at which the event log displays that a user is nearing the quota limit within a specific volume.

For example, you can set a user's disk quota limit to 50 MB and the disk quota warning level to 45 MB on a volume. With these settings, the user can store no more than 50 MB on the volume. If the user stores more than 45 MB on the volume, you can set the disk quota system to log a system event to the event log.

In addition, you can specify a quota limit for users but allow the users to exceed that quota limit. When you enable quotas without limiting disk space, you can track disk-space use on a per-user basis without denying users access to a volume when they exceed that limit. It is also possible to specify whether the system logs an event when a user exceeds the quota warning level and quota limit.

Enabling, Disabling, or Setting Disk Quotas on a Volume

  1. Log in to the NAS Manager.

  2. Click Disks.

  3. Click Volumes.

  4. On the Volumes page, click the volume to manage.

  5. Click Set Default Quota.

  6. On the Default Quota for volume page, click the Use quota limits to manage use of the volume check box.

  7. Click the Limit volume usage to check box and enter the volume usage limit.

  8. Click OK.

NOTE: Setting a default quota entry for a volume applies the setting to any users (without individual disk quotas) accessing the volume.

Adding Disk Quota Entries

The Quota Entries page allows you to add, delete, or configure disk quotas for any NAS system user.

When you enable disk quotas for an existing volume, volume usage is automatically tracked for new users from that point forward. However, existing volume users have no disk quotas applied to them. You can apply disk quotas to existing volume users by adding new quota entries in the Quota Entries window.

To add a new quota entry, perform the following steps:

  1. Log in to the NAS Manager.

  2. Click Disks.

  3. Click Volumes.

  4. On the Volumes page, click the volume to manage.

  5. Click Set Quota Entries.

  6. On the Set User Quotas for Volume page click New Quota Entry.

  7. Select a local user from the list box, or type the name of a domain account in the text box (in the format domain_name\user_name).

  8. To allow unlimited disk space usage, click the Do not limit volume usage radio button, and then go to step 10. Otherwise, go to step 9.

  9. To limit disk space, perform the following steps:

    1. Click the Limit volume usage to radio button.

    1. In the text box, enter a numerical value to specify the amount of disk space to assign to a particular user. Use the drop-down box to select kilobytes (KB), megabytes (MB), gigabytes (GB), terabytes (TB), petabytes (PB), or exabytes (EB).

    2. Enter the amount of disk space that, when filled, triggers a warning to the user or group member that the used disk space is near the disk-capacity limit. Use the drop-down box to select KB, MB, GB, TB, PB, or EB.

  10. Click OK.

Modifying Quota Properties

  1. Log in to the NAS Manager.

  2. Click Disks.

  3. Click Volumes.

  4. On the Volumes page, click the volume to manage.

  5. Click Set Quota Entries.

  6. On the Set User Quotas for volume page, click the user for whom you want to set a quota.

  7. Click Properties.

  8. On the Quota Entry Properties for volume\user page, click the Do not limit volume usage radio button to allow unlimited disk use, or perform the following procedure to limit disk space:

    1. Click the Limit volume usage to radio button.

    1. In the text box, enter a numerical value to specify the amount of disk space to assign to a particular user or group. Use the drop-down box to select KB, MB, GB, TB, PB, or EB.

    2. Enter the amount of disk space that, when filled, triggers a warning to the user or group member that the used disk space is near the disk-capacity limit. Use the drop-down box to select KB, MB, GB, TB, PB, or EB.

NOTE: Any previously entered warning level does not appear in the text box. However, the warning level is still set on the NAS system.
  1. Click OK.

Disabling Disk Quotas on a Volume

  1. Log in to the NAS Manager.

  2. Click Disks.

  3. Click Volumes.

  4. On the Volumes page, select the volume to manage.

  5. Click Set Default Quota.

  6. On the Default Quota for volume page, clear the Use quota limits to manage use of the volume check box.

  7. Click OK.

Removing User Quota Entries

  1. Log in to the NAS Manager.

  2. Click Disks.

  3. Click Volume.

  4. On the Volumes page, select the volume to manage.

  5. Click Set Quota Entries.

  6. On the Set User Quotas for volume page, click the user(s) for whom you want to remove a quota.

  7. Click Delete.

  8. Click OK.


Using Logs

A log file stores messages, which are sometimes called events or event log entries, generated by an application, service, or operating system. The messages are used to track the operations performed by the system. Log files are usually plain text (ASCII) files with the .log file extension.

The NAS system provides access to the following logs:

  • Application log

  • FTP log

  • NFS log

  • Security log

  • System log

  • Web (HTTP) shares log

  • Web administration log

Viewing Log Entry Details

You can view details from specific log files such as the date, time, source, event ID, description, and data.

To view log entry details, perform the following steps:

  1. Log in to the NAS Manager.

  2. Click Maintenance.

  3. Click Logs.

  4. On the Logs page, select the type of log you want to view.

  5. Click the radio button next to the log entry you want to view.

  6. In the Tasks list, click Event Details or View Log depending on the selected log type.

  7. On the Log Details page, click Up and Down to scroll through the log files.

  8. Click Back to close the Log Details page and return to the log entry list on the Logs page.

Modifying Log Properties

For system, security, and application logs, you can specify the maximum log size and determine how the system handles log entries when the maximum capacity of the NAS system is reached.

To modify the properties of a log file, perform the following steps:

  1. Log in to the NAS Manager.

  2. Click Maintenance.

  3. Click Logs.

  4. On the Logs page, select the type of log you want to configure.

  5. In the Tasks list, click Log Properties.

  6. In the Maximum log size text box on the Log Properties page, enter the maximum size (in kilobytes) of the log.

  7. Determine how you want the system to handle log file entries after the maximum log file size has been reached, and then click one of the following choices:

    • Overwrite events as needed — The system writes over older events with new events as they occur.

    • Overwrite events older than ____ days — The system retains the event entries for the specified number of days before the events can be written over by current event entries.

    • Do not overwrite events — The system retains all events in the log and appends new events to the end of the file.

  8. Click OK.

Downloading Log Files

The NAS Manager allows you to download specific log files from your NAS system.

To download log files, perform the following steps:

  1. Log in to the NAS Manager.

  2. Click Maintenance.

  3. Click Logs.

  4. On the Logs page, select the type of log you want to download.

  5. In the Tasks list on the Log Type Log page, click Download Log.

  6. On the Download Log Type Log page, if available, select the file type that you want to download, and then click Download Log.

  7. In the File Download dialog window, select Save this file to disk.

  8. Specify a directory where the log will be saved, and then click Save.

  9. Click Close to close the File Download dialog window after the download is complete.

Viewing Downloaded Log Files

After downloading the log files, it is possible to view them in the following ways:

  • .log files — With a text editor such as Microsoft Notepad.

  • .csv files — With a text editor or with Microsoft Excel.

  • .evt files — With the Event Viewer. The Event Viewer can usually be found under Administrative Tools from the Start menu of a Windows 2000 system. In the Event Viewer window, click Action and then click Open Log File. Browse to the location of your log file, choose the log type of your file, and then click Open.

Clearing Log Files

  1. Log in to the NAS Manager.

  2. Click Maintenance.

  3. Click Logs.

  4. On the Logs page, select the type of log you want to clear.

  5. Select the specific log you want to clear, and then click Clear Log in the Tasks list.

  6. On the Clear Log Confirmation page, click OK to clear the log.


Shutting Down the NAS System

To shut down, restart, or schedule a shutdown of the NAS system using the NAS Manager, perform the following steps:

  1. Log in to the NAS Manager.

  2. Click Maintenance.

  3. Click Shutdown.

  4. Click Shut Down, Restart, or Scheduled Shutdown.

  5. If you select Scheduled Shutdown, specify when the shutdown should occur, and then click OK.

  6. On the Confirmation page, click OK to confirm the action.

If you choose to restart the NAS system, the Restarting page displays. When the NAS Manager detects that the NAS system has come back online, the NAS Manager automatically returns to the home page.

NOTE: Do not refresh or perform any function in the NAS Manager until it comes back online. If you click Refresh, the NAS Manager might not automatically refresh.

Managing Disks and Volumes

To manage disks and volumes on your NAS system, you should use the Disk Management utilities. These utilities allow you to create virtual disks in hardware RAID and External Storage systems. They also allow you to rescan, create volumes, and manage volumes.

To manage disks, perform the following procedure:

  1. Log into NAS Manager as an administrator.

  2. Click the Disks tab.

  3. Click Disks to manage disks.

  4. When the Remote Desktop session launches, log in as an administrator.

  5. When the Computer Management screen displays, perform one of the following:

    • On software-RAID NAS systems, click on Disk Management to manage disks.

    • On hardware-RAID and external storage configuration NAS systems, click on Disk Management (Dell OpenManage Array Manager) to manage internal and external disks and RAID groups.

To manage volumes, perform the following procedure:

  1. Log into NAS Manager as an administrator.

  2. Click the Disks tab.

  3. Click Volumes to manage volumes.

  4. When the Remote Desktop session launches, log in as an administrator.

  5. The Disk Management window opens allowing you to manage your volumes.


Shadow Copies

Shadow Copy service allows the creation of point-in-time copies of your NAS system's data volumes. Shadow Copy software can be configured using the NAS Manager.

NOTE: Shadow copies can be accessed through SMB and NFS shares. Shadow copies cannot be accessed through HTTP, FTP, AppleTalk, or NetWare shares.

Introduction to Shadow Copies

A shadow copy is a point-in-time copy of a shared file or folder. If you change a file on the active file system after making a shadow copy, the shadow copy contains the old version of the file. If an active file gets corrupted or deleted, you can restore the old version by copying the file from the latest shadow copy or restoring a directory or file.

NOTICE: Shadow copies are temporary backups of your data that typically reside on the same volume as your data. If the volume becomes damaged and you lose your data, the shadow copy is also lost. Therefore, using shadow copies should not replace performing regular backups.

Difference File

The Shadow Copies service stores changed data in a difference file. A difference file resides on each volume of your system. You can use the NAS Manager to change the amount of space that is dedicated to the difference file.

Shadow Copies Considerations

When using shadow copies, note the following:

  • When the shadow copy difference file reaches the maximum number of shadow copies (64 copies per volume), the system deletes the oldest shadow copy file.

  • Shadow copies are read-only. You cannot edit them.

  • Shadow copies are made of entire volumes. You cannot make shadow copies of individual files or folders.

  • NFS clients can access shadow copy data as read-only files.

  • If you add a volume and you plan to defragment that volume, format the source volume where you intend to enable shadow copies with an allocation unit size of 16 kilobytes (KB) or larger. If you do not format the shadow copies volume, defragmenting the volume can cause previous versions of files to be deleted.

NOTE: If you use NTFS file system file compression on the source volume, you cannot use an allocation unit size larger than 4 KB. Defragmenting the source volume causes the difference file, which contains all changed data, to grow. If the difference file grows beyond the allocated space, you might lose previous versions of some files. Having a large NTFS file cluster size decreases the growth of the difference file.

Storing Shadow Copies

The NAS system can store a maximum of 64 shadow copies per volume; however, if you exceed the maximum, the oldest copy is overwritten. This number of copies allows you to schedule multiple shadow copies.

Configuring Volume Settings

  1. Log in to the NAS Manager.

  2. Click Disks.

  3. Click Shadow Copies.

  4. Select the volume that you want to configure.

  5. Click Properties.

  6. Set the maximum size for shadow copies by either selecting No limit or selecting Use limit and entering the amount of disk space that can be used for shadow copies.

  7. Click OK.

Using Shadow Copies

In addition to scheduling shadow copies, you can make new copies on demand, delete existing copies, configure the shadow copies environment, and set shadow copy retention weights.

Making a Shadow Copy on Demand

  1. Log in to the NAS Manager.

  2. Click Disks.

  3. Click Shadow Copies.

  4. Select the volume(s) of which you want to make a shadow copy.

  5. In the Tasks list on the Manage Shadow Copies page, click New Shadow Copy.

The page refreshes and the number in the Copies column increases by 1.

Deleting a Shadow Copy

  1. Log in to the NAS Manager.

  2. Click Disks.

  3. Click Shadow Copies.

  4. On the Manage Shadow Copies page, select the volume for which you want to delete shadow copies, and then click View Shadow Copies.

You can select only one volume at a time.

  1. On the Shadow Copies on Volume x page, click the copies you want to delete, and then click Delete.

  2. When asked if you want to delete the shadow copies, click OK.

Scheduling Shadow Copies

For any volume, you can schedule shadow copies to occur once, daily, weekly, or monthly.

Creating a Shadow Copies Schedule

  1. Log in to the NAS Manager.

  2. Click Disks.

  3. Click Shadow Copies.

  4. Select the volume for which you want to schedule shadow copies, and click Set Schedule in the Tasks list.

  5. In the Tasks list, click New.

  6. In the New Shadow Copy for Volume x page, click Once, Daily, Weekly, or Monthly and complete the information on the page.

  7. Click OK.

The scheduled shadow copy displays on the Shadow Copy Schedules on Volume x page.

  1. Click New to schedule another shadow copy

NOTE: It is recommended to schedule no more than two shadow copies per day.

Deleting a Shadow Copy Schedule

  1. Log in to the NAS Manager.

  2. Click Disks.

  3. Click Shadow Copies.

  4. Select the shadow copy schedule that you want to delete, and click Set Schedule in the Tasks list.

  5. Select the scheduled shadow copy you want to delete.

  6. In the Tasks list, click Delete.

  7. Click OK to delete the scheduled shadow copy.

Editing a Shadow Copy Schedule

  1. Log in to the NAS Manager.

  2. Click Disks.

  3. Click Shadow Copies.

  4. Select the volume for which you want to edit shadow copy schedules, and click Set Schedule in the Tasks list.

  5. Select the scheduled shadow copy you want to edit.

  6. In the Tasks list, click Properties.

  7. Change the settings as desired.

  8. Click OK to save the shadow copy settings.

Accessing Shadow Copies

The files and folders within a shadow copy are identical to the permissions on the original files and folders.

Accessing Shadow Copies From Client Systems Running Windows

Clients running Windows operating systems must meet the following requirements, depending on the operating system, to access shadow copies:

  • Client systems running Windows Server 2003 already have the software available to access shadow copies.

  • Client systems running Windows XP need to install the previous versions pack. This pack is located in the %systemroot%\system32\clients\twclient directory of your NAS system.

  • Client systems running Windows 2000 and Windows NT® need the Shadow Copy Client system software, which is available at microsoft.com.

When the client software is installed, perform the following steps to access shadow copies:

  1. Map to a share on the NAS system with the folder file that you want to access

  2. Right click the folder or file you want to access and click Properties.

  3. Click the Previous Versions or Shadow Copies tab to display previous versions that you can access.

  4. Click the desired previous version.

  5. Click View to browse the folder.

  6. Click Copy to copy the contents to a new location.

  7. Click Restore to restore the contents to the original location (If it is a folder, all subdirectories will also be restored).

Accessing Shadow Copies From Client Systems Running UNIX

Client systems running UNIX® do not require additional software to access a shadow copy. When a client system mounts a share with shadow copies, shadow copies are a pseudodirectory of the share in the format .@GMT-YYYY.MM.DD-HH:MM:SS.

You can browse shadow copy pseudodirectories like any other directory. Permission rules are the same as for client systems running Windows, except that client systems running UNIX with permissions when the shadow copy was taken will have permissions to access the shadow copy.

Defragmenting a Volume Containing Shadow Copies

Defragmenting the source volume causes the difference file to increase. If the difference file increases beyond the allocated space, you might lose previous versions of some files. Even with a 16 KB cluster size, the shadow copy difference file will increase. If the difference increases too much (greater than the maximum set), shadow copies will be deleted.

If you do not have to keep shadow copies, delete them before defragmenting to improve the performance of the defragmentation. See "Deleting a Shadow Copy."


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