User's Manual

Troubleshooting 289
3 Restore the virtual disk from the tape onto healthy physical disks.
Cannot Create a Virtual Disk
You might 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. See Maximum Number of
Virtual Disks per Controller for more information.
• 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.
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 generally advisable to create virtual disks of larger size when
using Storage Management.
Virtual Disk Errors on 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 should
do the following:
1
Back up your data.