On Wed, Jul 30, 2008 at 5:47 PM, Richard Michael <rmichael-raid@xxxxxxxxxxxxxxxx> wrote: > On Wed, Jul 30, 2008 at 04:56:38PM -0500, Jon Nelson wrote: >> On Wed, Jul 30, 2008 at 4:49 PM, Richard Michael >> <rmichael-raid@xxxxxxxxxxxxxxxx> wrote: >> > Re-reading what I wrote, it's a mess of typos. :) But, yes, I want to >> > remove half the disks on a regular basis, as off-site storage, and return >> > them to the array for periodic resync. >> >> Basically what you want is a raid 51. >> 2x RAID5 (4 disks each) mirrored to form a RAID1. > > Exactly. Have you built such a config and managed to get the system > booting from the nested RAID1 (perhaps even with LVM inside)? This is > where I am having difficulty. Else, I'll just create an 8-way RAID1 of > 100MB or so for /boot (as usual, as I mentioned elsewhere). Built? Yes. Managed to get it to boot? No. Not bothered. Just partition the drives with a bit to spare (a few gig) and use that. No great loss and it saves a great deal of hassle. I'd use 4 drives for storage in raid5 and the other 4 also in raid5 for swap. -- Jon -- 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
