Logical Drive Administration
This section provides the information needed to create logical drives, initialize and synchronizing
logical drives, or access blocked logical drives.
Creating Logical Drives:
Each ServeRAID adapter or controller supports a maximum of 8 logical drives.
Depending upon the stripe-unit size being used, you can combine a maximum of 8 or 16 physical drives into
each logical drive.
To create a logical drive:
Note: The number of hard disk drives in the array determines the RAID levels available for the array.
The ServeRAID program uses the maximum available space for the selected RAID level to calculate the default value that it assigns.
Note: The actual logical drive size may be slightly different from
what you type in the Requested Space field.
The RAID level and the number of hard disk drives determine the size of the logical drive.
For example, a disk array consisting of three, 1 GB hard disk drives with a requested RAID level-0 logical drive of 1000 MB will
actually contain only 999 MB because the data is striped across all three drives, with 333 MB on each drive.
Initializing Logical Drives: Initializing a logical drive erases the
first 1024 sectors on the drive and prevents access to any data previously stored on the drive.
To initialize a logical drive:
Synchronizing Logical Drives: The purpose of synchronizing logical drives is to
compute and write the parity data on the selected drives.
If the type of ServeRAID adapter or controller you are using does not support the auto-synchronization and data-scrubbing features,
manually synchronize your RAID level-1 and RAID level-5 logical drives weekly.
This does not alter data on the drive.
Synchronizing a logical drive verifies that the data redundancy for the logical drive is correct.
To synchronize a logical drive:
Unblocking Logical Drives: When the ServeRAID adapter or controller performs a Rebuild operation on an array, it reconstructs
the data that was stored in RAID level-1 and RAID level-5 logical drives.
However, the ServeRAID adapter or controller cannot reconstruct the data that was stored in any RAID level-0 logical
drives in that array.
The data in the RAID level-0 logical drives is blocked when the ServeRAID adapter or controller detects that the
array is valid, but the data might be damaged.
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:
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