On 6/25/07, Roger Oberholtzer <[EMAIL PROTECTED]> wrote:
4. insert the new disks.

<snip>

One more thing: I have a udev rule so my SATA disks have the same kernel
name when they are put in the same physical slot (I have 4 removable
SATS disks bays). If you do not have this, sdd can become sde (and so
on) after a swap. /var/log/messages tells what the inserted disk is
known as. Perhaps it is as simple as that.

I am not a mdraid user, but I do follow the libata mailing list.
Hotswap should work from an ATA level.  As Roger says the default
behavior is to assign the drive a new /dev/sdx name that will not
correspond with the original name.

I don't know what the fix is, but that is almost definitely the
problem.  FYI: If your just testing and you get the rebuild to work,
make sure you test a reboot, because that will change the /dev/sdx
value back to its original value.

Greg
--
Greg Freemyer
The Norcross Group
Forensics for the 21st Century
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