You can't have multiple sized disks in the same parity set, my bet is that these are the same physical sized disks, but these disks have all the Raid5 stripes on them and some of the other disks in the set were added later.
If they are unconfigured, meaning they show up as unit 0 in WRKDSKSTS at the bottom, then you need to stop partity on these. You might have to stop parity on the entire set, remove these drives, and then restart back on the remaining disks.
When you add or remove RAID, it does NOT destroy any data on the disks. The beauty of IBM i. You need a min of 3 disks (which you will have poor performance on as these look like SCSI disks from the size) for RAID5. Unsure of what your reasons are for putting the disks into a separate ASP, but you could keep them in the same raid set and put them into a different ASP.
From: midrange-l-bounces@xxxxxxxxxxxx [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Rene K.
Sent: Monday, August 19, 2013 5:11 AM
Subject: Removing (unconfigured) disks from RAID-5 array?
apparently two 8GB disk that I left unconfigured are not only in the System ASP (as by design), but also part of the (RAID-5) parity protection of 4x 17GB disks.
Why this happened I don't know, let's just call it inexperience :)
I wanted to move the 8GB disks to a User ASP and mirror them, but the system won't let me. I don't really need the 8GB disks, but I think it's better to keep the RAID array 'clean' by using similar sized disks. Maybe this move also changes the RAID-5's status from 'unprotected' to 'protected' ('Display Disk Configuration Status' screen shows ASP 1 as 'unprotected', while all four disks show 'RAID-5/Active'??).
Documentation seems to say that I have to stop parity protection to move the disks to another ASP, but in my world, 'stopping/destroying a RAID array' means 'loosing all data that's on that array'.
My question is: is it possible in i5/OS V5R4 to stop parity protection, move the 8GB disks to another ASP, and enable parity protection on the disks in ASP 1 again, without having to reinstall the LIC/OS again?
Thanks for any info,
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