Ok, refined the problem a lot, but still not quite there: 1. Choose expert mode install
2. Go through language, keyboard, cd detection, load installer components, detect and configure network 3. Switch to console on F2 and type these three commands: 3.1 modprobe dm-mod 3.2 udpkg -i /cdrom/pool/main/d/dmraid/dmraid-....udeb (only file in that dir) 3.3 dmraid -ay (this will make the fakeraid arrays visible to disk-detect) 4. Continue through detect and partition disks, timezone and clock, users and passwords, install base system, install kernel 5. Switch back to console on F2 and do the following: 5.1 cp /sbin/dmraid /target/sbin (this is necessary because the dmraid .deb is not available for install to /target) 5.2 chroot /target 5.3 nano /usr/share/initramfs-tools/hooks/dmraid - this will create a new file, which needs three lines: . /usr/share/initramfs-tools/hook-functions manual_add_modules dm-mod copy_exec /sbin/dmraid /sbin/ 5.4 nano /usr/share/initramfs-tools/scripts/init-premount/dmraid - this will create another new file, which needs two lines: modprobe dm-mod dmraid -ay 5.5 **make sure you chmod +x both these files after creating them!** 5.6 update-initramfs -u (this will add the above stuff to your installed initrd) 6. Continue through setting up the package manager, select and install software 7. [At this point I still don't know how to get either grub or lilo to install, so choose "Continue without boot loader" and finish - I am lucky enough to have Grub already installed and working, so I can continue to experiment] Now, that all looks as if it ought to work, but for some reason it doesn't quite. Three out of four modifications to the initrd work: the dm-mod module is included in the build, the dmraid executable is included in the build, and the dm-mod is successfully modprobe'd. But the dmraid -ay command in the init-premount script does not get run, even though /sbin/dmraid is present on the initrd, and can be run manually from the busybox shell (where it successfully creates the /dev/mapper/sil_* devices). Unfortunately even running it from there does not allow me to boot - when I CTRL-D to go back to the boot, it still hangs on "Waiting for root file system ... ...". Now the most bizarre bit. If I go back to step 5 above and replace /usr/share/initramfs-tools/init with the busybox shell before updating the initrd, I can boot manually by typing the commands from that original init file one at a time after dropping into the busybox shell. I can manually do the modprobe and dmraid commands, and when I get to the mountroot command it successfully mounts /dev/mapper/sil_aebdgidebbaj4 as /root! So why will it do that when I process init manually, and not when I use the break option and manually execute dmraid? And why will dmraid not run from my init-premount script, even though modprobe runs successfully from the same script? Does this have something to do with 5.1 (the executable being from a udeb rather than from a proper package)? I'm sorry I cannot offer any of this as ready-to-use patches. I do not know which package(s) would need the patching. But sections 3 and 5 above show clearly what needs to be added to make this work. I would love to get this working - it seems very close now. Please reply to [EMAIL PROTECTED] rather than to my personal email address. Thank you, Chris Carr -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.432 / Virus Database: 268.16.8/621 - Release Date: 09/01/2007 13:37