Extend logical drive

Posted on 2011-09-15
Medium Priority
Last Modified: 2012-05-12
Our Exchange 2007 running on Windows Server 2008. We have a SAN storage which used to allocate logical drive for exchange storage group. We have 8 storage group and Exchange running on CCR.

Our problem is the logical which previously assign to storage going to full. So from SAN storage console, we had extended that logical drive from 500GB to 700GB. From the SAN console, this logical drive appear as one 700GB logical drive.

On Windows, at disk management, another 200GB logical drive appear. We made is online. When we click on disk 1 (logical drive with 500GB) and choose extended option, this option was grey out.

Temporary solution is we backup the data inside 500GB logical drive to another temp drive, offline it, then we can extend it to another 200GB which mean the extend option is now available.

Is there anyway to extend the drive while the drive is online?
Question by:suriyaehnop
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LVL 43

Accepted Solution

kevinhsieh earned 2000 total points
ID: 36547335
Your SAN LUN should have only a single primary partition on it. The disk type should be basic. Ince you expand the LUN from your SAN console you can go to Disk Management and rescan the drives. It should appear that the drive is larger with unused space, not as a separate drive. You can then right click on the partition to expand it. You can also do all of this from the command line utility diskpart.exe

List disk
Select disk X
Select partition 1
LVL 19

Author Comment

ID: 36547759

I'm experiancing that when expand the LUN from SAN console, then on Disk Management, it appear as another logical drive, hence i'm able to expend it? why it show as another logical ?
LVL 43

Expert Comment

ID: 36551185
I would check with your SAN vendor.
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LVL 19

Author Comment

ID: 36597001
Attached is a screenshot on disk management. On SAN Storage, I did extended the drive from 300GB to 400GB. On Disk Management it appeared as another logical value.

I had format it as "New Simple volume" but still "Extend Valume"  grey out.

Please advice
LVL 43

Expert Comment

ID: 36597339
You should be able to select the primary partition and extend that. You certainly need to delete the new E: partition that you created. After you do that, select the MISC partition, right click and select extend.

You can also try running diskpart.exe. You can use help from within the program, but the commands should be

DISKPART> list disk
(show show all disks. Disk 2 should show 100 GB free
DISKPART> select disk 2

Disk 2 is now the selected disk.

DISKPART> list partition
list of partitons. Should only show 1.

DISKPART> select partition 1

Partiton 1 is now the selected partition.
DISKPART> extend
LVL 19

Author Comment

ID: 36597684
Using GUI, still not able to extend the drive but using command prompt, it able to extended. In GUI, the extend option still grey out

why was that?

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