User's Manual

290 Troubleshooting

Delete the virtual disk.

Create one or more virtual disks that are smaller than 1TB.

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, see your operating system documentation.

Problems Associated With Using the Same Physical Disks for Both

Redundant and Non-Redundant Virtual Disks

When creating virtual disks, you should avoid using the same physical disks

for both redundant and non-redundant virtual disks. This recommendation

applies to all controllers. Using the same physical disks for both redundant

and non-redundant virtual disks can result in unexpected behavior including

data loss.

NOTE: SAS controllers do not allow you to create redundant and non-redundant

virtual disks on the same set of physical disks.

Considerations for CERC SATA1.5/6ch and CERC SATA1.5/2s Controllers When

Physical Disks are Shared by Redundant and Non-Redundant Virtual Disks

This section describes behavior that may occur on the CERC SATA1.5/6ch

and CERC SATA1.5/2s controllers if you use the same physical disks for both

redundant and non-redundant virtual disks. In this type of configuration, the

failure or removal of a physical disk can cause the following behavior:

• The non-redundant virtual disk displays a Failed state.

Resolution:

This behavior is expected because the virtual disk is non-

redundant. In this case, the failure or removal of a single physical disk

causes the entire virtual disk to fail with no possibility of recovering the

data unless a backup is available.

• The redundant virtual disks display a Degraded state.

Resolution:

This behavior is also expected. Data can be recovered if a hot

spare is available to rebuild the failed or removed disk.

• Various disks display an Offline state. The Offline state may apply to all

physical disks used by the redundant and non-redundant virtual disks.