User's Manual

Does my controller support this feature? See Supported Features
If you do not have a suitable backup available, and if the failed disk is part of a virtual disk on a controller that supports the Online physical disk task, then
you can attempt to retrieve data by selecting Online from the failed disk's drop-down task menu.
The Online command attempts to force the failed disk back into a Online state. If you are able to force the disk into a Online state, you may be able to recover
individual files. How much data you can recover depends on the extent of disk damage. File recovery is only possible if a limited portion of the disk is damaged.
There is no guarantee you is able to recover any data using this method. A forced Online does not fix a failed disk. You should not attempt to write new data
to the virtual disk.
After retrieving any viable data from the disk, replace the failed disk as described previously in Replacing a Failed Disk that is Part of a Redundant Virtual Disk
or Replacing a Failed Physical Disk that is Part of a Non-Redundant Virtual Disk.
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Replacing a Failed Physical Disk in a RAID 1 on a CERC SATA1.5/2s
On a CERC SATA1.5/2s controller, a rebuild may not start automatically when you replace a failed physical disk that is part of a RAID 1 virtual disk. In this
circumstance, use the following procedure to replace the failed physical disk and rebuild the redundant data.
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1. Turn off the system.
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2. Disconnect the SATA cable on the failed physical disk in the RAID 1 virtual disk.
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3. Replace the failed physical disk with a formatted physical disk. You can format the physical disk using the Disk Utilities in the controller BIOS. (You may
not need to format the entire physical disk. Formatting 1% of the disk may be sufficient.)
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4. Reboot the system. When rebooted, the RAID 1 virtual disk should display a Failed Redundancy state.
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5. Expand the controller object in the tree view and select the Physical Disks object.
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6. Execute the Rebuild task for the physical disk you added.
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Recovering from Removing the Wrong Physical Disk
If the physical disk that you mistakenly removed is part of a redundant virtual disk that also has a hot spare, then the virtual disk rebuilds automatically either
immediately or when a write request is made. After the rebuild has completed, the virtual disk no longer has a hot spare since data has been rebuilt onto the
disk previously assigned as a hot spare. In this case, you should assign a new hot spare.
If the physical disk that you removed is part of a redundant virtual disk that does not have a hot spare, then replace the physical disk and do a rebuild.
For information on rebuilding physical disks and assigning hot spares, see the following sections:
l Understanding Hot Spares for RAID controllers
l Rebuild for PERC 4/SC, 4/DC, 4e/DC, 4/Di, PERC 5/E and PERC 5/i controllers
You can avoid removing the wrong physical disk by blinking the LED display on the physical disk that you intend to remove. For information on blinking the LED
display, see Blink and Unblink (Physical Disk).
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Resolving Microsoft Windows Upgrade Problems
If you upgrade the Microsoft Windows operating system on a server, you may find that Storage Management no longer functions after the upgrade. The
installation process installs files and makes registry entries on the server that are specific to the operating system. For this reason, changing the operating
system can disable Storage Management.
To avoid this problem, you should uninstall Storage Management before upgrading. If you have already upgraded without uninstalling Storage Management,
however, you should uninstall Storage Management after the upgrade.
After you have uninstalled Storage Management and completed the upgrade, reinstall Storage Management using the Storage Management install media. You
can download Storage Management from support.dell.com.
Virtual Disk Troubleshooting
The following sections describe troubleshooting procedures for virtual disks.
l Replacing a Failed Disk that is Part of a Redundant Virtual Disk
l Replacing a Failed Physical Disk in a RAID 1 on a CERC SATA1.5/2s
l A Rebuild Does Not Work
l A Rebuild Completes with Errors
l Cannot Create a Virtual Disk