Re: Problems with device-mapper on top of RAID-5 and RAID-6

On 2 Jun 2006, Uwe Meyer-Gruhl uttered the following:

Neil's suggestion indicates that there may be a race condition
stacking md and dm over each other, but I have not yet tested that
patch. I once had problems stacking cryptoloop over RAID-6, so it
might really be a stacking problem. We don't know yet if LVM over RAID
is affected as well.

I've been running LVM on RAID (spanning two RAID-5 arrays) for some time
now and have had no trouble (that I know of: a check just completed OK,
so the RAID layer at least is consistent). The arrays have both IDE and
SCSI (sym53c875) components.

Of course this is a subtle and intermittent problem so this is hardly
a green light :/

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