Re: Removing drives from system

Well you must dance the dance of being dangerously close to losing data. But you can do this.

First I woudl tell the system not to put any new data on the other four drives in the RAID set. STRASPBAL with *ENDALC for all 5 drive numbers in that RAID set.

Next you must IPL to DST because you cannot remove a drive from the system without going to DST, unless you are on V7R1.

In DST work with disk units, work with ASP configuration, selected the failed drive (#17) to Remove it from the ASP. All the data on that drive will be moved to other drives in the system (but not the ones in the failed RAID set.) Of course the drive is already dead so the data will be re-constructed on the fly with RAID and that will be moved to other drives.

At this point you still have drives exposed (i.e. no protection) but your data is all on drives that really exist. Next you want to remove the other drives in that RAID set as well. This will require you have enough disk space to do so (It will complain if you do not.) Once that is done your exposure is gone (you're only on protected drives).

Then you would stop RAID on the set in question or if it won't let you (I can't recall) just initialize them. (Under disk unit recovery) You can then either use these drives as future spares or start RAID again getting you a 4 drive RAID set and you could put them back into the ASP.

- Larry "DrFranken" Bolhuis

P.S. Or you could purchase a very cheap used FC #6717 8GB drive. :-)

On 6/24/2010 6:30 PM, Harman, Roger wrote:

I have an (obviously) old 720 with a failed 6717-070 drive. It's one of five in the cage and part of a raid set. I want to kill that raid set, remove the drive and bring it up on just the remaining 4 drives. It is not the load source. I've done this long ago to swap out drives. Can't recall the steps though. I don't think I had to use DST but that's what I see on the IBM site.

Any suggestions? I just need to limp along for about another month or so - just to support a couple of twinax devices - no users.

Thanks.

--Protection--
Unit ASP Type Status Compression
14 1 DPY ACTIVE
15 1 DPY ACTIVE
16 1 DPY UNPROT
17 1 DPY FAILED
18 1 DPY UNPROT
19 1 DPY UNPROT
20 1 DPY UNPROT

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