IBM 866251Y - Netfinity 5500 M20, Руководство по техническому обслуживанию аппаратной части

Страница: 117 / 386

After the Rebuild operation completes, you can unblock the
RAID level-0 logical drives and access them once again.
But remember, the logical drive might contain damaged
data. You must either re-create, install, or restore the data
from the most recent backup disk or tape.
To unblock a blocked drive:
1. Select the blocked logical drive from the Main screen
of the Administration and Monitoring Program.
2. Select Unblock to unblock the drive.
3. Initialize all unblocked logical drives before using
them. See “Initializing logical drives” on page 107.
4. Restore the data to the drive from the most recent
backup disk or tape.
Logical drive migration administration:
The logical drive migration (LDM) feature dynamically
changes the current logical drive structure. You can use
this procedure to change the RAID level, increase the free
space in a disk array, or change the size of a logical drive.
To use the LDM feature, you must have at least two logical
drives available: one free (FRE) logical drive and one
source logical drive that is in the okay (OKY) state. During
the LDM procedure, the ServeRAID adapter or controller
changes the state of the FRE logical drive to SYS; then,
temporarily uses the SYS drive to perform the migration.
When the migration procedure completes, the ServeRAID
adapter or controller changes the state of the SYS drive
back to FRE.
Change RAID levels:
The ServeRAID adapters and controllers support changing
RAID levels as follows:
Ÿ
Change two-drive RAID level-0 to RAID level-5 by
adding one hard disk drive
Ÿ
Change two-drive RAID level-1 to RAID level-5 by
adding one hard disk drive
Ÿ
Change from RAID level-5 to RAID level-0 by
removing one hard disk drive
To change the RAID level of an existing disk array:
Note
If you are migrating to RAID level-0, the last drive
defined in the array becomes RDY.
You can change (migrate) the RAID levels of currently defined
logical drives. To use the Change RAID Level feature, all of
the logical drives within the array must be the same RAID
level.
Netfinity 5500 M20 - Type 8662
109