Ben Ross wrote:
> Hi All,
>
> I'm using a raid1 setup with the raidtools 0.90 and mingo's raid patch
> against the 2.2.15 kernel.
...
> My concern is if /dev/sdb1 really crashes and I replace it with another
> fresh disk, partition it the same as before, and do a resync, everything
> on /dev/sdc1 (raid-disk 1) will be deleted.
There is a big difference between a resync from either a mkraid or dirty
restart vs. a resync to a spare disk. When resyncing to a spare, the device is
in degraded mode and the driver knows what disks have valid data on them and
only reads from them. The spare is only written to and is only read from once
the resync completes. In the case of an mkraid or dirty restart, the driver
picks a disk to read and sticks with it for consistency sake until the resync
is complete.
<>< Lance.
