As brian said you have to use echo "scsi add-single-disk a b c
d"/proc/scsi/scsi to insert
the new disque. Then I used scsi-start coming in the rpm scsi-idle to spin
up the disk.
(You don't need to patch the kernel with the scsi-idle stuff to have it work)
I've never tried the solution
I really feel that you have to get into the sources of the raid softwares
and patches to see what the
real functionalities of this stuff are ! Well, I'll probably do it but I
feel that a lot of people out there are willing to use
software raid "out of the box" and wont go through all this