On Mon, 2014-01-20 at 19:07 +0000, Ron Leach wrote: > On 20/01/2014 18:29, Phil Turmel wrote: > > > > Let me clarify: /dev/md0 should be a v0.90 or v1.0 raid1 for /boot, no LVM. > > > > /dev/md1 is an LVM PV for the OS. > > > Ok. That means I need physical partitions for those, on each of the > drives. > > Since I am using 3TB drives, I'll need to use a GPT which, if I > understand correctly, requires to reveal a dummy 'partition' to make > the BIOS think there is a boot sector thingy there. > > So I'm assuming to pre-partition the physical devices this way: > > /dev/sd[x]1 - 64k (? I'm checking the docs) empty, for BIOS to see I've set mine to 1MB (bios boot, EF02 in gdisk) this means it aligns nicely on the 1 MB partition as does its start position 2048 sectors on a 512e drive. > /dev/sd[x]2 - 128 MB /boot v0.90/v1.0 RAID1, /dev/md0 I'm not sure here, but I have no problems using a 1.2 metadata partition... I think the reason it works is that the stuff in biosboot contains everything needed to boot, the "boot" directory is not needed with biosboot as its only a temp staging area used to build the boot loader which is then copied to the biosboot... I would check this for yourself just to be sure; I recall I kept it as a seperate partition due to a miss-understanding and/or it seemed the "right way" at the time. > /dev/sd[x]3 - remainder ~3 TB for LVM, v1.2 RAID1, /dev/md1 > > and then make the two RAID1s, and then create the LVM. > > > > > > > Having root in an LVM allows strange things like relocating and/or > > resizing it on the fly. Particularly handy if physical access is difficult. > > > > Yes, it was that potential aspect that set me deciding to try your > approach. Functional demands on our systems keep changing. > > Much appreciated, Ron > -- > 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 > -- 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
