Re: 8203-E4A RAID5 vs. ASP protection

Just removing the drive from the ASP does not also remove it from the RAID set, so if the drive failed, yes the system is in jeopardy. You’ll loose the system if another drive fails.

Replacing the drive is reasonably easy and the RAID will rebuild putting you back on solid ground. Then you can re-add the space back, or create an iASP or secondary ASP.

Larry Bolhuis and I actually demonstrated doing this live during a COMMON session. The drive finished initializing exactly on time during the session.

Jim Oberholtzer
Agile Technology Architects

On Feb 29, 2024, at 5:52 AM, Patrik Schindler <poc@xxxxxxxxxx> wrote:

Hello,

on said machine I got regular messages about an imminent DASD failure. I've identified the disk (number three) in question and removed it from the ASP: There plentiful space left without it.

In the "Display Disk Configuration Protection" screen, each individual disk is listed as "RAID 5" in the "Protection" column, but the ASP itself is listed as unprotected.

Serial Resource Hot Spare
ASP Unit Number Type Model Name Protection Protection
1 Unprotected
1 Y2103QN***** 433C 099 DD001 RAID 5 N
2 Y2103QN***** 433C 099 DD002 RAID 5 N
4 Y2103QN***** 433C 099 DD004 RAID 5 N
5 Y2103QN***** 433C 099 DD005 RAID 5 N
6 Y2103QN***** 433C 099 DD006 RAID 5 N

I'm not sure how to interpret this display. If a disk fails, does RAID5 protection kick in and leave the ASP in usable state? If yes, what is the meaning of the "unprotected" display for the ASP?

Thanks!

:wq! PoC

--
This is the Midrange Systems Technical Discussion (MIDRANGE-L) mailing list
To post a message email: MIDRANGE-L@xxxxxxxxxxxxxxxxxx
To subscribe, unsubscribe, or change list options,
visit: https://lists.midrange.com/mailman/listinfo/midrange-l
or email: MIDRANGE-L-request@xxxxxxxxxxxxxxxxxx
Before posting, please take a moment to review the archives
at https://archive.midrange.com/midrange-l.

Please contact support@xxxxxxxxxxxxxxxxxxxx for any subscription related questions.