Users Guide

The rebuild may also report sense key errors. In this situation, take the following actions to restore the
maximum data possible:
1. Back up the degraded virtual disk onto a fresh (unused) tape drive.
• If the backup is successful — If the backup completes successfully, then the user data on the
virtual disk has not been damaged. In this case, you can continue with step 2.
• If the backup encounters errors — If the backup encounters errors then the user data has been
damaged and cannot be recovered from the virtual disk. In this case, the only possibility for
recovery is to restore from a previous backup of the virtual disk.
2. Perform a Check Consistency on the virtual disk that you have backed up onto a tape drive.
3. Restore the virtual disk from the tape drive onto healthy physical disks.
Cannot Create A Virtual Disk
You may be attempting a RAID configuration that is not supported by the controller. Check the following:
• How many virtual disks already exist on the controller? Each controller supports a maximum number
of virtual disks.
• Is there adequate available space on the disk? The physical disks that you have selected for creating
the virtual disk must have an adequate amount of free space available.
• The controller may be performing other tasks, such rebuilding a physical disk, that must run to
completion before the controller can create the new virtual disk.
Related Concepts
Number Of Virtual Disks Per Controller
A Virtual Disk Of Minimum Size Is Not Visible To Windows Disk Management
If you create a virtual disk using the minimum allowable size in Storage Management, the virtual disk may
not be visible to Windows Disk Management even after initialization. This occurs because Windows Disk
Management is only able to recognize extremely small virtual disks if they are dynamic. It is advisable to
create virtual disks of larger size when using Storage Management.
Virtual Disk Errors On Systems Running Linux
On some versions of the Linux operating system, the virtual disk size is limited to 1TB. If you create a
virtual disk that exceeds the 1TB limitation, your system may experience the following behavior:
• I/O errors to the virtual disk or logical drive.
• Inaccessible virtual disk or logical drive.
• Virtual disk or logical drive size is smaller than expected.
If you have created a virtual disk that exceeds the 1TB limitation, you must:
1. Back up your data.
2. Delete the virtual disk.
3. Create one or more virtual disks that are smaller than 1TB.
4. Restore your data from backup.
Irrespective of whether your Linux operating system limits the virtual disk size to 1TB, the virtual disk
size depends on the version of the operating system and any updates or modifications that you have
implemented. For more information on operating system, see your operating system documentation.
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