On Mon, Apr 02, 2012 at 05:19:34PM +0200, Niels S. Eliasen wrote: > Dó you have a cookbook for getting grub2 working(with the raid of course) ?
Well I can tell you what my setup is. I am using an IBM p710 (and I also have a p520 with a very similar setup although currently using a somewhat patched and manually installed via dd and other hacks that you wouldn't want to know about). I currently have: sda1: about 8MB, type PReP boot, flagged as bootable sda2: 1GB, type linux raid sda3: 140GB, type linux raid sdb and sdc are exactly the same. sda2, sdb2 and sdc2 are raid1 (I have 3 disks and I want all of them to be able to boot, so raid1 over 3 disks seemed fine). sda3, sdb3 and sdc3 are in raid5 and is currently / but I will change that to LVM when I reinstall the machine later this week. I am using grub from git checked out 20120320. I am also using the 3.2.0 backport kernel since it appears there is a problem with 2.6.32 and software raid. grub-probe would often get garbage trying to read the raid superblocks, and even using dd to read them and having them checked by someone that knwos the format of them, they were in fact garbage, but only sometimes. Other times it worked. 3.2.0 on the other hand has never returned invalid superblock data for the raid. So using 3.2.0 backport kernel and grub compiled from git from a couple of weeks ago I can then do: grub-install /dev/sda1 And after that, it boots fine and works as expected. Well on the serial console, the boot menu doesn't actually display quite right, so perhaps that could use some work still. For redundancy I actually do: grub-install /dev/sdc1 grub-install /dev/sdb1 grub-install /dev/sda1 and then update the boot disk order with: nvsetenv boot-device "/pci@80000002000000a/pci1014,0339@0/sas/disk@0 /pci@80000002000000a/pci1014,0339@0/sas/disk@10000 /pci@80000002000000a/pci1014,0339@0/sas/disk@20000" Since grub only sets it to the device you specified, and I want fall back to any of the 3 disks if needed. I haven't convinced the grub developers to allow multiple devices to be passed to grub-install at the same time. Perhaps later I will succeed in that. Anyhow, that works for me. If you are not using an IBM, then of course you won't be using a PReP partition for booting, and probably won't be using a DOS partition table either, which would change things a bit. grub-install does know about a few other types of powerpc machines, so it still ought to work in pretty much the same way. The actual setup of the raid was done through the debian installer the normal way, although I only thought of adding sdc2 to the raid1 later, so I did that manually. -- Len Sorensen -- To UNSUBSCRIBE, email to debian-powerpc-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20120402161850.gl10...@caffeine.csclub.uwaterloo.ca
