replacing faulty hd

[Bernd Schubert <bernd-schubert@web.de>]

Hi,

we have a raid5 with persistent superblock and need to replace one of the 
harddisks.

Currently 3 of 4 md-devices (each built from 5 partition of 5 disks) work fine 
and have full raid5 support, but for md0 only 4 partitions are active.

What happens if we shutdown the server and replace the faulty disk by a new 
unpartitioned one ? I'm a bit worried that due to the autostart due to the 
persistent superblock something could become destroyed.

Actually I would prever an kernel parameter to disable raid autostart and 
first partition the harddisk, but so far I havn't found something like this.


Thanks,

Bernd