Re: let md auto-detect 128+ raid members, fix potential race condition

From: Luca Berra
Date: Wed Aug 02 2006 - 02:35:08 EST

On Tue, Aug 01, 2006 at 05:46:38PM -0300, Alexandre Oliva wrote:
Using the mkinitrd patch that I posted before, the result was that
mdadm did try to bring up all raid devices but, because the raid456
module was not loaded in initrd, the raid devices were left inactive.

probably your initrd is broken, it should not have even tried to bring
up an md array that was not needed to mount root.

Then, when rc.sysinit tried to bring them up with mdadm -A -s, that
did nothing to the inactive devices, since they didn't have to be
assembled. Adding --run didn't help.

My current work-around is to add raid456 to initrd, but that's ugly.
Scanning /proc/mdstat for inactive devices in rc.sysinit and doing
mdadm --run on them is feasible, but it looks ugly and error-prone.

Would it be reasonable to change mdadm so as to, erhm, disassemble ;-)
the raid devices it tried to bring up but that, for whatever reason,
it couldn't activate? (say, missing module, not enough members,

this would make sense if it were an option, patches welcome :)


Luca Berra -- bluca@xxxxxxxxxx
Communication Media & Services S.r.l.
/ \
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at