The short answer is no you are not screwed.

This is the sort version:

For a failed load source and a powered off system.

If you are mirrored removed the failed load source and move its mirror to the load source position, insert new disk in mirrored position power on system and resume mirror.

If you are raided replace the failed disk, power on system, wait for an extremely long IPL, you will be IPLing from the stripe, perform rebuild of raid.


message: 1
date: Thu, 10 Jul 2014 06:46:01 -0700
from: "Rene K." <kraats@xxxxxxxxx>
subject: Question about Load Source (V5R4) misbehaviour.

Hi all,

After Googling and reading PDF's, I'm still not clear on the LS recovery subject.
It seems that, no matter if you use parity, mirroring or what have you, load source disks are the Achilles heel of (older) i platforms.

I've read somewhere (this forum probably) that I'm not supposed to shutdown the system when the load source disk fails.
I've a 9406-800 running V5R4 at home which (I think) doesn't support hot-swapping disks (the cage should have an optional feature for that I think).

Does that mean that, for such a robust platform as OS400/i5OS/IBM i, I'm screwed when that disk fails? Would I need to reinstall from tape? Why bother with offering a RAID option for said machine then in the first place?

Could be that I'm misinterpreting information, but I haven't found a satisfying explanation yet.

If I were to power up my machine (it's at home, so I don't run it 24/7) and experience a broken disk, Is there a possibility to swap the broken disk, IPL the system nonetheless and rebuild the protection from there?




Subject: Digest Footer

This is the Midrange Systems Technical Discussion (MIDRANGE-L) digest list To post a message email: MIDRANGE-L@xxxxxxxxxxxx To subscribe, unsubscribe, or change list options,
or email: MIDRANGE-L-request@xxxxxxxxxxxx Before posting, please take a moment to review the archives at


End of MIDRANGE-L Digest, Vol 13, Issue 1071


This email message, including any attachment(s) is for the sole use of the intended recipient(s) and may contain confidential information. Any unauthorized review, use, disclosure or distribution is strictly prohibited. If you are not the intended recipient, please immediately contact the sender by email.

This thread ...


Return to Archive home page | Return to MIDRANGE.COM home page