Vital Patches for ataraid with Intel Matrix RAID (ICH7)

Daniel O'Connor doconnor at
Sat Mar 22 04:12:34 UTC 2008

On Thu, 20 Mar 2008, Stef Walter wrote:
> Don't duplicate the RAID amoeba style if you boot with a drive
> present that was detached from a RAID. This can happen if you manage
> to get past the above panic problem. You'll end up with two devices
> like ar0 and ar1. This can be a major mess if ar1 was already
> contained active file systems.

I have seen this bug in other ATA RAID implementations (VIA & Promise) 
too. From what I can tell this part of your patch is general to all ATA 
RAID arrays, right?

I can be bad even with just ar0 - you can end up with ar0 & ar1 after a 
boot where ar0 is stale, it's awesome fun to debug :(

Daniel O'Connor software and network engineer
for Genesis Software -
"The nice thing about standards is that there
are so many of them to choose from."
  -- Andrew Tanenbaum
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