Michael wrote and now answers his own question Went back to Harald's original e-mail on the subject and re-configured the partitions - it appears to all work now. In the example below, the first raid partition does not begin at the physical disk start, changing that allows lilo to recognize the md devices, that's the only change I made. The start below is produced by fdisk so should be accurate. Don't have time to experiment further, must deliver this system. > This is what I have > > / /dev/md0 is raid 1 of hda3 + hdc3 > /boot /dev/md1 is raid 1 of hda2 + hdc2 > > lilo.conf > ----------- > disk=/dev/md0 > # fdisk of hda > bios=0x80 > sectors=63 > heads=16 > cylinders=39770 > partition=/dev/md1 > # from fdisk -ul -- starts at block 408 > start=410256 > > boot=/dev/hda > delay=50 > vga=normal > > image=/boot/bzImage > root=/dev/md0 > label=Linux > read-only > > ----------------------- > this all looks OK to me > lilo complains: don't know how to handle device 0x0901 > > seems I must be doing something fundamentally wrong. This appears to > me to be essentially identical to the example. > > Michael > [EMAIL PROTECTED] >