Debian Raid Crash Repair

[Siju George <sgeorge.ml@gmail.com>]

hi,

I had a mirror o sarge with 2 disks. One of them failed now. I had
given an option for 1 spare disk while configuring Raid. Could some
one please tell me what I should do to Place a new disk and recreate
the mirror?? Should I manually partition the new disk or is there a
command that I can run after connecting the disk so that the Raid
Partitions will be created automatically and the rest of the space in
the hard disk be freely available? I would like to place an 80 GB disk
instead of a 40 GB one.

Thankyou so much

Kind Regards

Siju