Logical Drive Migration Administration

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:

 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.

The ServeRAID adapters and controllers support changing RAID levels as follows:

•  Change two-drive RAID level-0 to RAID level-5 by adding one hard disk drive
•  Change two-drive RAID level-1 to RAID level-5 by adding one hard disk drive
•  Change from RAID level-5 to RAID level-0 by removing one hard disk drive

1. Click on the   icon on the Tool Bar or select Manage Disk Arrays from the
    Advanced pull-down menu, then, select Logical Drive Migration.

    A screen similar to the following appears.
   

    
   
2.  Select Change RAID Level.
3.  Click on OK.
    
   
4.  Select a migrating option from the pull-down list.

   NOTE: The affected logical drives appear, based on the migrating option you select.

5.  Click on OK to proceed.
6.  Click on OK to verify the operation.
7.  Select a Ready (RDY) drive to add to the array, if you are migrating to RAID level-5.

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