OK, here goes the question:
I set up raid1 on 2 disks with 2 partitions each (sda sdb, 1+2) both as raid1, md0 and md1.
md0 was /boot on both sda and sdb
md1 was / on both sda and sdb
sda also contained a swap partition outside the raid1 setup
This was a i386 setup done with gparted disk for the partitions and the raid using mdadm --create with a suffix of --metadata=0.90 (similar) as suggested by the program
I set the mount points from the Debian install disk and rebooted,
all was fine.
To simulate a disk, or lead failure, I disconnected the sda ide lead (each drive on individual leads) and the boot process will not find any drive.
I tried to access what was on the drive using 'supergrub2' cd but it found errors when trying to access raid, presumably because grub is only on sda
is there any means of rectifying this without starting again?