From: Cohen, Andy (Andy.Cohen@cognex.com)
Date: Fri Sep 23 2005 - 11:33:11 EDT
ORIGINAL POSTING
================
We have a DS20E running Tru64 5.1. There are two internal disks that are
mirrored by LSM. Overnight one of them failed which brought the server
down (see my previous email). We've rebooted off the one good remaining
drive. In the meantime we've removed the bad drive and have received a
replacement for it (DS-RZ2ED-LS). I'm told that this is hot-swappable so
I can put it in with the sytem up and rebuild the mirror.
My questions are:
1) How do I make sure that once the new blank drive is installed the
system doesn't think that's the good drive and resync the existing drive
to this new, blank drive thereby wiping out the entire system disk? Is
that even a possibility?
2) How do I rebuild the mirror?
[In the interest of conserving bytes I've ommitted lots of specifics
about the hardware]
SUMMARY
=======
The procedure to rebuild was straight-forward enough. However --
because we are running 5.1A PK6 we were bitten badly by a bug that was
introduced in PK6. We got to the very last step in the process and it
wouldn't complete the remirroring (I'm not familiar enough with LSM to
really know what happened). After 6 hours of tech support from HP via
phone one of the people at HP I was working with discovered a note for
this problem. Basically PK6 fixed a bug with LSM yet introduced another
bug. The fix was to uninstall that one LSM patch from PK6. Once that
worked we were able to finish remirroring the two drives.
Here's a summary from HP:
Thanks to Sunils help we found a known problem with 5.1a patch kit 6
" patch 1998 ". We remove " patch 1998 " and we were able to remove
swapvol-01 and all other plexes on dsk0.
Andy you should leave patch 1998 out of your system. Patch 1998
was suppose to fix the problem you had with not being able to remove
swapvol from LSM. But looks like it fixed that problem for some issues
with removing swapvol. But has created a probelm with other issues that
can cause a problem removing swapvol. If you have the problem in the
future
removing swapvol from LSM. Reinstall patch 1998 to clear that problem.
I hope this helps others from getting burned by this.
Andy
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