On Mon, Apr 02, 2012 at 12:18:50PM -0400, Lennart Sorensen wrote: > 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.
Oh and if you want, I can put my debian source package for the git checkout of grub up on my website. -- 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/20120402162025.gm10...@caffeine.csclub.uwaterloo.ca
