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Home > Dell PowerEdge 2950, PERC 6/i > Dell PERC 6/i RAID5 Volume Non-Destructive Expansion

Dell PERC 6/i RAID5 Volume Non-Destructive Expansion

  • System Notes: Dell PowerEdge 2950, Windows Server 2008 R2 Standard

How I performed a non-destructive (“hot”) disk space expansion on an existing RAID5 array volume in a Dell PowerEdge 2950 server with a PERC 6/i RAID controller.

    1. Make sure a hard drive is available to add to the array, and that it is either already blanked, or that you don’t care about any existing data on it.
    2. Open the Dell OpenManage Server Administrator, navigate to the Storage node, and find the newly added available drive.  Make sure it has a state of “Ready.”
    3. Still under the Storage node, click on the Virtual Disks entry.  For the RAID volume to which the new drive is going to be added, click the drop-down under Tasks and select Reconfigure…
    4. On the Reconfigure Virtual Disk X (Step 1 of 3) screen, click the check box next to the new disk to add to the array.
    5. On the Reconfigure Virtual Disk X (Step 2 of 3) screen, click the radial next to the type of RAID array you are expanding
      (RAID5 in this case).
    6. Click Finish on the final Reconfigure Virtual Disk X (Step 3 of 3) screen to begin reconstructing the RAID array with the additional disk.  The Virtual Disk State will show “Reconstructing” during this process.  On a RAID5 volume with 300 GB SAS disks, going from 3 to 4 disks, the reconstruction took approximately 6 hours.
    7. Once the RAID reconstruction is complete, the disk volume in Windows must still be expanded into the newly available space.  In Windows Server 2008 R2, this can be done directly from the Disk Management interface in the Server Manager, using the Extend Volume command.

Additional Notes:

For older Windows Server operating systems, the DISKPART command must be used to extend a volume.

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  1. Mies
    November 13, 2015 at 12:48 pm

    I might be good to add, this drastically reduces server performance.
    Windows is only getting 10MB/sec

    for me after 1 hour still 0% (on a 32TB Volume)

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