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IBM AIX/UNIX system storage administration ksh/perl scripting

Friday, May 22, 2009

Replacing a disk in an SSA RAID5 Array

Replacing a disk in an SSA RAID5 Array


Environment

OS level: 4.3.x - 5.x
SSA Raid 5 Array

Problem

How do I replace a disk in an SSA RAID5 array?

Solution

If the disk has not been rejected from the array:
Enter smitty ssaraid and select the following:
--> Change Member Disks in an SSA RAID Array
--> Remove a disk from an SSA RAID Array
--> Select the array in question and remove pdisk#...

The following steps apply to both rejected and non-rejected disks:
2) Have the CE physically replace the disk (he should set it in service mode).
3) rmdev -dl pdisk# ; cfgmgr -vl ssar
4)Enter smitty ssaraid and select the following:
--> Change/Show use of an ssa physical disk
--> Change the new pdisk's "current use" to Array Candidate.
5) smitty ssaraid
--> Change Member Disks in an SSA RAID Array
--> Add a disk to an SSA RAID Array
--> Add the new pdisk definition to the array

This definition should now be in a "degraded" state. After adding the new disk the array will go into a "Rebuilding" state, and ultimately a "Good" state after the rebuild operation is complete. This progress can be monitored via:

smitty ssaraid
--> List Status of all Defined SSA RAID Arrays
--> These numbers will get smaller as the array rebuilds and once they all go to zero, the array should be in a "Good" State"

This menu does not update dynamically, you will have to exit out, then go back in to see the progress.

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