Xserve RAID not showing added space

Question

Xserve RAID not showing added space

I've currently added a new drive to a RAID 5 array, but the added space isn't visible to the host systems.

Beforehand we had 5 465 GiB drives and added a 698 GiB drive(I know that it may not be fully used in the array), but no extra space after a reboot of both the Xserve RAID and the cluster nodes that use it.

Here is the linux kernel SCSI output, all three nodes of the cluster output the same data in dmesg.
The value of 2.0TB/1.81 TiB is the old value before the array expansion, but the Xserve RAID utility
shows 2.27 TiB

scsi 2:0:0:0: Direct-Access APPLE Xserve RAID 1.51 PQ: 0 ANSI: 5
sd 2:0:0:0: [sdc] 3907043328 512-byte hardware sectors (2000406 MB)
sd 2:0:0:0: [sdc] Write Protect is off
sd 2:0:0:0: [sdc] Mode Sense: b3 00 00 08
sd 2:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
sd 2:0:0:0: [sdc] 3907043328 512-byte hardware sectors (2000406 MB)
sd 2:0:0:0: [sdc] Write Protect is off
sd 2:0:0:0: [sdc] Mode Sense: b3 00 00 08
sd 2:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
sdc: sdc1 sdc2

Macbook, Mac OS X (10.5.5)

Posted on Dec 11, 2008 10:44 AM

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Answer 1

Dec 12, 2008 5:33 PM in response to kerneldeveloper

Expansion is a 2 step process: First, you expand the array. Second, you merge the slices. The documentation is clear on step #2, but the GUI doesn't FORCE you to do it. However, it is necessary.

If you did both steps, try rebooting your host and see if it picks up the changed size. It does work... the usual issue though is growing the file system to recognize the additional size. On Linux, I can't help you.

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