Re-using SSA disks previously members of a SSA RAID array

Re-using SSA disks previously members of a SSA RAID array

Post by Peter Bjoe » Thu, 18 Mar 1999 04:00:00

On Tue, 16 Mar 1999 20:12:12 -0500 a carbon-based biped by the name of Lekic

>The bunch of SSA disks were members of the SSA RAID array(s). The
>array is gone and pdisks can be created OK (manually or via cfgmgr). All
>attempts to create  hdisks on those pdisks fail. The pdisks can't
>be formatted either via ssa_format.

>Is there an area on the drive that identifies it as an array member?
>There must be a way to clear this. Any ideas?

Somewhere under the SSA Raid menu entry in the smit|Devices menu,
there is a point that will let you change the usage of a SSA disk.
If a disk has been a member of an array, it is probably listed as
'Array candidate disk' or 'Hot Spare'.
Change that to 'AIX system disk' for all the disks, and you should
be able to re-use the units as normal SSA disks.




1. Reusing SSA disks used as RAID array members

what format ?! what you mean by _can't_be_removed_?
Did you just blow up SSA-RAID controller or something,
installed new one and now cannot get rid of stale physical volumes?

"rmdev -l hdiskx  -d" removes this raid array disk from ODM that was known
to AIX as physical disk. May be you need remove and reconfigure physical
SSA disk too "rmdev -l pdiskx -d".
After that run "cfgmgr" and all available and working SSA physical disks
will be configured as ordinary physical disk .(like SCSI disks, just
one-to-one mapping exsist between hdiskx and pdiskx, not many-to-one
like with SSA RAID5 disks)
Now you can proceed with volume group creation an so on. There is no need to
format drives... :-)

Oh, yes, If you had any volume groups on those failed disks...
run "exportvg <vg name>" to remove VG information from ODM.

Hasso Brck
Technical Manager
Korel SYS Ltd.

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