Hello, I have 16 disks and two RAID controllers, 8 disks per controller. These are c0d0 -> c0d7 and c1d0 -> c1d7. The first disk on each controller is configured with two partitions: 300MB (p1) and the rest of the disk (p2). Then I make some mirror plexes: c0d0p1 + c1d0p1 = md0 c0d0p2 + c1d0p2 = md1 c0d1p1 + c1d1p1 = md2 c0d2p1 + c1d2p1 = md3 c0d3p1 + c1d3p1 = md4 c0d4p1 + c1d4p1 = md5 c0d5p1 + c1d5p1 = md6 c0d6p1 + c1d6p1 = md7 Disks c0d7p1 and c1d7p1 are added to md7 as spares, and all the mirrors are configured to be in the same spare-group in mdadm.conf. If I loose a disk in a mirror other than md7, then md will steal a spare disk from md7 and use that. But what if the disk is c0d0 or c1d0? There are two mirror plexes sitting on top of these disks mirroring different partitions. Will md work this out, partition the spares accordingly and fix up both using one spare disk, or will it just break, or will it get really confused and try to use both the spares in md7 to resolve the situation? I think I already know what the answer's going to be and that I've just shot myself in the foot? Well, not quite as this isn't a live server yet so I have time to correct this. Rgds, John -- 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
