Users Guide

Receive A Bad Block Alert With Replacement, Sense, Or Medium Error
The following alerts or events are generated when a portion of a physical disk is damaged:
• 2146
• 2147
• 2148
• 2149
• 2150
This damage is discovered when the controller performs an operation that requires scanning the disk.
Examples of operations that may result in these alerts are as follows:
• Consistency check
• Rebuild
• Virtual disk format
• I/O
If you receive alerts 2146 through 2150 as the result of performing a rebuild or while the virtual disk is in a
degraded state, then data cannot be recovered from the damaged disk without restoring from the
backup. If you receive alerts 2146 through 2150 under circumstances other than a rebuild, then data
recovery may be possible. The following describes each of these situations.
Alerts 2146 Through 2150 Received During A Rebuild Or While A Virtual Disk
Is Degraded
Perform the following steps:
1. Replace the damaged physical disk.
2. Create a new virtual disk and allow the virtual disk to completely resynchronize.
While the resynchronization is in progress, the status of the virtual disk is Resynching.
3. Restore data to the virtual disk from the backup.
Alerts 2146 Through 2150 Received While Performing I/O, Consistency
Check, Format, Or Other Operation
If you receive alerts 2146 through 2150 while performing an operation other than a rebuild, replace the
damaged disk immediately to avoid data loss.
Perform the following steps:
1. Back up the degraded virtual disk to a fresh (unused) tape drive.
2. Replace the damaged disk.
3. Perform a rebuild.
Read And Write Operations Experience Problems
If the system hangs, times out, or experiences other problems with read and write operations, then there
may be a problem with the controller cables or a device.
Related Concepts
Cables Attached Correctly
192