Hi, I'm currently combing two servers into one, and I'm trying to figure out the safest way to do that. System one had two md arrays: one raid-1 with the OS and a second one with data (raid-5) It is bootable through lilo System two had 9 arrays, one with the OS (raid-1) two raid-1's for swap, and 6 md devices that belong in an LVM volume. This system has grub. All md arrays are self-booting 0xFD partitions. I want to boot off system one. I verified that that boots fine if I disconnect all the [system-2] drives, so that's working okay. Now when I boot I get a lilo prompt, so I know the right disk is booted by the BIOS. When logged in, I see only the md devices from system two, and thus the current md0 "/" drive is from system two. Now what options do I have ? If I zero the superblock(s) (or even the whole partitions) from md0 of system 2, it will not boot off of that obviously, but what will now get to be md0 ? It could be the second array from system 2 equally well as the first array from system one, right ? I could experiment with finding the right array by using different kernel root= commandlines, but only grub gives me that possibility, lilo has no boot-time shell (well, it has a commandline...) Another thing that strikes me is that running 'mdadm --detail --scan' also only finds the arrays from system 2. Is that expected since it just reads its /etc/mdadm.conf file, or should it disregard that and show all arrays ? Upon first glance 'fdisk -l' does show all devices fine (there are 10 of them) I think (er, hope, actually) that with mdadm.conf one could probably force the machine to recognize the right drives as md0 as opposed to them being numbered mdX, but is that a right assumption ? At the time the kernel md code reads / assembles the various 0xFD partitions, the root-partition is not mounted (obviously) so reading /etc/mdadm.conf will not be possible. I'll start to try out some things but I _really_ want to avoid having an unbootable system: for one, this system has no CDrom nor floppy, and even more importantly I don't think my rescue media have all neccessary drivers for the ATA & SATA cards. Anyone have some good advice for me ? Maarten -- - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
