Under the guidance of technical support or as instructed
by the Recovery Guru, you can check the redundancy on a volume in
a pool or volume group to determine whether the data on that volume
is consistent. Redundancy data is used to quickly reconstruct information
on a replacement drive if one of the drives in the pool or volume
group fails.
Before
you begin
The status of the
pool or volume group must be Optimal.
The pool or volume
group must have no volume modification operations in progress.
You can check redundancy
on any RAID level except on RAID 0, because RAID 0 has no data redundancy.
(Pools are configured only as RAID 6.)
Note: Check
volume redundancy only when instructed to do so by the Recovery Guru
and under the guidance of technical support.
About
this task
You can perform this check only on one pool or
volume group at a time. A volume redundancy check performs the following
actions:
Scans the data blocks
in a RAID 3 volume, a RAID 5 volume, or a RAID 6 volume, and checks
the redundancy information for each block. (RAID 3 can only be assigned
to volume groups using the command line interface.)
Compares the data
blocks on RAID 1 mirrored drives.
Returns redundancy
errors if the controller firmware determines that the data is inconsistent.
Note: Immediately
running a redundancy check on the same pool or volume group might
cause an error. To avoid this problem, wait one to two minutes before
running another redundancy check on the same pool or volume group.
- Select .
- Select .
The Check Redundancy dialog
box appears.
- Select the
volumes you want to check, and then type check to confirm you want to perform this operation.
- Click Check .
The check volume redundancy operation starts. The
volumes in the pool or volume group are sequentially scanned, starting
from the top of the table in the dialog box. These actions occur as
each volume is scanned:
The volume is selected
in the volume table.
The status of the
redundancy check is shown in the Status column.
The check stops on
any media or parity error encountered, and then reports the error.
More about the status of the
redundancy check
| Status |
Description |
| Pending |
This is the first volume to be scanned,
and you have not clicked Start to start the redundancy check.
or
The redundancy check operation is being performed
on other volumes in the pool or volume group.
|
| Checking |
The volume is undergoing the redundancy
check.
|
| Passed |
The volume passed the redundancy check.
No inconsistencies were detected in the redundancy information.
|
| Failed |
The volume failed the redundancy check.
Inconsistencies were detected in the redundancy information.
|
| Media error |
The drive media is defective and is unreadable.
Follow the instructions displayed in the Recovery Guru.
|
| Parity error |
The parity is not what it should be for
a given portion of the data. A parity error is potentially serious
and could cause a permanent loss of data.
|
- Click Done after the last volume in the pool or volume
group has been checked.