Hi - For some reason, my raid5 array resyncs after every reboot. I don't recall this happening originally, although I have had to hot-add disks after failures and upgrade mdadm between then and now. Below I have attached some logs of bootup. All of the event counters are identical, so I wouldn't expect to see a resync. Does the kernel not stop raid arrays that it did not start? I ask because the disks in question are attached to a controller which is started when its driver is loaded via a module. When the module is loaded, I have already seen md autodetect in the logs, and I have a mdadm-raid script in my bootscripts which kicks in. However, I don't have any kill scripts on shutdown. Lastly, after unmounting all file systems, I see something blink on console about md0 (I believe to the affect that it is in use) right before the actual reset. If someone could provide insight into the resyncs (even though the event counters are the same), or validate what I think may be happening (meaning that md keeps a dirty bit around in addition to the event counter), I'd appreciate that. regards, Nathan Feb 3 15:59:51 screwdriver kernel: md: md driver 0.90.0 MAX_MD_DEVS=256, MD_SB_DISKS=27 Feb 3 15:59:51 screwdriver kernel: md: Autodetecting RAID arrays. Feb 3 15:59:51 screwdriver kernel: md: autorun ... Feb 3 15:59:51 screwdriver kernel: md: ... autorun DONE. --snip-- << module for controller loaded >> --snip-- Feb 3 15:59:51 screwdriver kernel: [events: 00000018] Feb 3 15:59:51 screwdriver kernel: md: bind<scsi/host4/bus0/target1/lun0/part1,1> Feb 3 15:59:51 screwdriver kernel: [events: 00000018] Feb 3 15:59:51 screwdriver kernel: md: bind<scsi/host4/bus0/target2/lun0/part1,2> Feb 3 15:59:51 screwdriver kernel: [events: 00000018] Feb 3 15:59:51 screwdriver kernel: md: bind<scsi/host4/bus0/target3/lun0/part1,3> Feb 3 15:59:51 screwdriver kernel: [events: 00000018] Feb 3 15:59:51 screwdriver kernel: md: bind<scsi/host4/bus0/target4/lun0/part1,4> Feb 3 15:59:51 screwdriver kernel: [events: 00000018] Feb 3 15:59:51 screwdriver kernel: md: bind<scsi/host4/bus0/target5/lun0/part1,5> Feb 3 15:59:51 screwdriver kernel: [events: 00000018] Feb 3 15:59:51 screwdriver kernel: md: bind<scsi/host4/bus0/target6/lun0/part1,6> Feb 3 15:59:51 screwdriver kernel: [events: 00000018] Feb 3 15:59:51 screwdriver kernel: md: bind<scsi/host4/bus0/target7/lun0/part1,7> Feb 3 15:59:51 screwdriver kernel: [events: 00000018] Feb 3 15:59:51 screwdriver kernel: md: bind<scsi/host4/bus0/target8/lun0/part1,8> Feb 3 15:59:51 screwdriver kernel: [events: 00000018] Feb 3 15:59:51 screwdriver kernel: md: bind<scsi/host4/bus0/target9/lun0/part1,9> Feb 3 15:59:51 screwdriver kernel: [events: 00000018] Feb 3 15:59:51 screwdriver kernel: md: bind<scsi/host4/bus0/target10/lun0/part1,10> Feb 3 15:59:51 screwdriver kernel: [events: 00000018] Feb 3 15:59:51 screwdriver kernel: md: bind<scsi/host4/bus0/target11/lun0/part1,11> Feb 3 15:59:51 screwdriver kernel: [events: 00000018] Feb 3 15:59:51 screwdriver kernel: md: bind<scsi/host4/bus0/target12/lun0/part1,12> Feb 3 15:59:51 screwdriver kernel: [events: 00000018] Feb 3 15:59:51 screwdriver kernel: md: bind<scsi/host4/bus0/target13/lun0/part1,13> Feb 3 15:59:51 screwdriver kernel: [events: 00000018] Feb 3 15:59:51 screwdriver kernel: md: bind<scsi/host4/bus0/target0/lun0/part1,14> Feb 3 15:59:51 screwdriver kernel: md: scsi/host4/bus0/target0/lun0/part1's event counter: 00000018 Feb 3 15:59:51 screwdriver kernel: md: scsi/host4/bus0/target13/lun0/part1's event counter: 00000018 Feb 3 15:59:51 screwdriver kernel: md: scsi/host4/bus0/target12/lun0/part1's event counter: 00000018 Feb 3 15:59:51 screwdriver kernel: md: scsi/host4/bus0/target11/lun0/part1's event counter: 00000018 Feb 3 15:59:51 screwdriver kernel: md: scsi/host4/bus0/target10/lun0/part1's event counter: 00000018 Feb 3 15:59:51 screwdriver kernel: md: scsi/host4/bus0/target9/lun0/part1's event counter: 00000018 Feb 3 15:59:51 screwdriver kernel: md: scsi/host4/bus0/target8/lun0/part1's event counter: 00000018 Feb 3 15:59:51 screwdriver kernel: md: scsi/host4/bus0/target7/lun0/part1's event counter: 00000018 Feb 3 15:59:51 screwdriver kernel: md: scsi/host4/bus0/target6/lun0/part1's event counter: 00000018 Feb 3 15:59:51 screwdriver kernel: md: scsi/host4/bus0/target5/lun0/part1's event counter: 00000018 Feb 3 15:59:51 screwdriver kernel: md: scsi/host4/bus0/target4/lun0/part1's event counter: 00000018 Feb 3 15:59:51 screwdriver kernel: md: scsi/host4/bus0/target3/lun0/part1's event counter: 00000018 Feb 3 15:59:51 screwdriver kernel: md: scsi/host4/bus0/target2/lun0/part1's event counter: 00000018 Feb 3 15:59:51 screwdriver kernel: md: scsi/host4/bus0/target1/lun0/part1's event counter: 00000018 Feb 3 15:59:51 screwdriver kernel: md0: max total readahead window set to 3328k Feb 3 15:59:51 screwdriver kernel: md0: 13 data-disks, max readahead per data-disk: 256k Feb 3 15:59:51 screwdriver kernel: raid5: device scsi/host4/bus0/target0/lun0/part1 operational as raid disk 0 Feb 3 15:59:51 screwdriver kernel: raid5: device scsi/host4/bus0/target13/lun0/part1 operational as raid disk 13 Feb 3 15:59:51 screwdriver kernel: raid5: device scsi/host4/bus0/target12/lun0/part1 operational as raid disk 12 Feb 3 15:59:51 screwdriver kernel: raid5: device scsi/host4/bus0/target11/lun0/part1 operational as raid disk 11 Feb 3 15:59:51 screwdriver kernel: raid5: device scsi/host4/bus0/target10/lun0/part1 operational as raid disk 10 Feb 3 15:59:51 screwdriver kernel: raid5: device scsi/host4/bus0/target9/lun0/part1 operational as raid disk 9 Feb 3 15:59:51 screwdriver kernel: raid5: device scsi/host4/bus0/target8/lun0/part1 operational as raid disk 8 Feb 3 15:59:51 screwdriver kernel: raid5: device scsi/host4/bus0/target7/lun0/part1 operational as raid disk 7 Feb 3 15:59:51 screwdriver kernel: raid5: device scsi/host4/bus0/target6/lun0/part1 operational as raid disk 6 Feb 3 15:59:51 screwdriver kernel: raid5: device scsi/host4/bus0/target5/lun0/part1 operational as raid disk 5 Feb 3 15:59:51 screwdriver kernel: raid5: device scsi/host4/bus0/target4/lun0/part1 operational as raid disk 4 Feb 3 15:59:51 screwdriver kernel: raid5: device scsi/host4/bus0/target3/lun0/part1 operational as raid disk 3 Feb 3 15:59:51 screwdriver kernel: raid5: device scsi/host4/bus0/target2/lun0/part1 operational as raid disk 2 Feb 3 15:59:51 screwdriver kernel: raid5: device scsi/host4/bus0/target1/lun0/part1 operational as raid disk 1 Feb 3 15:59:51 screwdriver kernel: raid5: allocated 14819kB for md0 Feb 3 15:59:51 screwdriver kernel: raid5: raid level 5 set md0 active with 14 out of 14 devices, algorithm 2 Feb 3 15:59:51 screwdriver kernel: raid5: raid set md0 not clean; reconstructing parity Feb 3 15:59:51 screwdriver kernel: RAID5 conf printout: Feb 3 15:59:51 screwdriver kernel: --- rd:14 wd:14 fd:0 Feb 3 15:59:51 screwdriver kernel: disk 0, s:0, o:1, n:0 rd:0 us:1 dev:scsi/host4/bus0/target0/lun0/part1 Feb 3 15:59:51 screwdriver kernel: disk 1, s:0, o:1, n:1 rd:1 us:1 dev:scsi/host4/bus0/target1/lun0/part1 Feb 3 15:59:51 screwdriver kernel: disk 2, s:0, o:1, n:2 rd:2 us:1 dev:scsi/host4/bus0/target2/lun0/part1 Feb 3 15:59:51 screwdriver kernel: disk 3, s:0, o:1, n:3 rd:3 us:1 dev:scsi/host4/bus0/target3/lun0/part1 Feb 3 15:59:51 screwdriver kernel: disk 4, s:0, o:1, n:4 rd:4 us:1 dev:scsi/host4/bus0/target4/lun0/part1 Feb 3 15:59:51 screwdriver kernel: disk 5, s:0, o:1, n:5 rd:5 us:1 dev:scsi/host4/bus0/target5/lun0/part1 Feb 3 15:59:51 screwdriver kernel: disk 6, s:0, o:1, n:6 rd:6 us:1 dev:scsi/host4/bus0/target6/lun0/part1 Feb 3 15:59:51 screwdriver kernel: disk 7, s:0, o:1, n:7 rd:7 us:1 dev:scsi/host4/bus0/target7/lun0/part1 Feb 3 15:59:51 screwdriver kernel: disk 8, s:0, o:1, n:8 rd:8 us:1 dev:scsi/host4/bus0/target8/lun0/part1 Feb 3 15:59:51 screwdriver kernel: disk 9, s:0, o:1, n:9 rd:9 us:1 dev:scsi/host4/bus0/target9/lun0/part1 Feb 3 15:59:51 screwdriver kernel: disk 10, s:0, o:1, n:10 rd:10 us:1 dev:scsi/host4/bus0/target10/lun0/part1 Feb 3 15:59:51 screwdriver kernel: disk 11, s:0, o:1, n:11 rd:11 us:1 dev:scsi/host4/bus0/target11/lun0/part1 Feb 3 15:59:51 screwdriver kernel: disk 12, s:0, o:1, n:12 rd:12 us:1 dev:scsi/host4/bus0/target12/lun0/part1 Feb 3 15:59:51 screwdriver kernel: disk 13, s:0, o:1, n:13 rd:13 us:1 dev:scsi/host4/bus0/target13/lun0/part1 Feb 3 15:59:51 screwdriver kernel: RAID5 conf printout: Feb 3 15:59:51 screwdriver kernel: --- rd:14 wd:14 fd:0 Feb 3 15:59:51 screwdriver kernel: disk 0, s:0, o:1, n:0 rd:0 us:1 dev:scsi/host4/bus0/target0/lun0/part1 Feb 3 15:59:51 screwdriver kernel: disk 1, s:0, o:1, n:1 rd:1 us:1 dev:scsi/host4/bus0/target1/lun0/part1 Feb 3 15:59:51 screwdriver kernel: disk 2, s:0, o:1, n:2 rd:2 us:1 dev:scsi/host4/bus0/target2/lun0/part1 Feb 3 15:59:51 screwdriver kernel: disk 3, s:0, o:1, n:3 rd:3 us:1 dev:scsi/host4/bus0/target3/lun0/part1 Feb 3 15:59:51 screwdriver kernel: disk 4, s:0, o:1, n:4 rd:4 us:1 dev:scsi/host4/bus0/target4/lun0/part1 Feb 3 15:59:51 screwdriver kernel: disk 5, s:0, o:1, n:5 rd:5 us:1 dev:scsi/host4/bus0/target5/lun0/part1 Feb 3 15:59:51 screwdriver kernel: disk 6, s:0, o:1, n:6 rd:6 us:1 dev:scsi/host4/bus0/target6/lun0/part1 Feb 3 15:59:51 screwdriver kernel: disk 7, s:0, o:1, n:7 rd:7 us:1 dev:scsi/host4/bus0/target7/lun0/part1 Feb 3 15:59:51 screwdriver kernel: disk 8, s:0, o:1, n:8 rd:8 us:1 dev:scsi/host4/bus0/target8/lun0/part1 Feb 3 15:59:51 screwdriver kernel: disk 9, s:0, o:1, n:9 rd:9 us:1 dev:scsi/host4/bus0/target9/lun0/part1 Feb 3 15:59:51 screwdriver kernel: disk 10, s:0, o:1, n:10 rd:10 us:1 dev:scsi/host4/bus0/target10/lun0/part1 Feb 3 15:59:51 screwdriver kernel: disk 11, s:0, o:1, n:11 rd:11 us:1 dev:scsi/host4/bus0/target11/lun0/part1 Feb 3 15:59:51 screwdriver kernel: disk 12, s:0, o:1, n:12 rd:12 us:1 dev:scsi/host4/bus0/target12/lun0/part1 Feb 3 15:59:51 screwdriver kernel: disk 13, s:0, o:1, n:13 rd:13 us:1 dev:scsi/host4/bus0/target13/lun0/part1 Feb 3 15:59:51 screwdriver kernel: md: updating md0 RAID superblock on device Feb 3 15:59:51 screwdriver kernel: md: scsi/host4/bus0/target0/lun0/part1 [events: 00000019]<6>(write) scsi/host4/bus0/target0/lun0/part1's sb offset: 35005504 Feb 3 15:59:51 screwdriver kernel: md: syncing RAID array md0 Feb 3 15:59:51 screwdriver kernel: md: minimum _guaranteed_ reconstruction speed: 100 KB/sec/disc. Feb 3 15:59:51 screwdriver kernel: md: using maximum available idle IO bandwith (but not more than 100000 KB/sec) for reconstruction. Feb 3 15:59:51 screwdriver kernel: md: using 124k window, over a total of 35005504 blocks. Feb 3 15:59:51 screwdriver kernel: md: scsi/host4/bus0/target13/lun0/part1 [events: 00000019]<6>(write) scsi/host4/bus0/target13/lun0/part1's sb offset: 35005504 Feb 3 15:59:51 screwdriver kernel: md: scsi/host4/bus0/target12/lun0/part1 [events: 00000019]<6>(write) scsi/host4/bus0/target12/lun0/part1's sb offset: 35005504 Feb 3 15:59:51 screwdriver kernel: md: scsi/host4/bus0/target11/lun0/part1 [events: 00000019]<6>(write) scsi/host4/bus0/target11/lun0/part1's sb offset: 35005504 Feb 3 15:59:51 screwdriver kernel: md: scsi/host4/bus0/target10/lun0/part1 [events: 00000019]<6>(write) scsi/host4/bus0/target10/lun0/part1's sb offset: 35005504 Feb 3 15:59:51 screwdriver kernel: md: scsi/host4/bus0/target9/lun0/part1 [events: 00000019]<6>(write) scsi/host4/bus0/target9/lun0/part1's sb offset: 35005504 Feb 3 15:59:52 screwdriver kernel: md: scsi/host4/bus0/target8/lun0/part1 [events: 00000019]<6>(write) scsi/host4/bus0/target8/lun0/part1's sb offset: 35005504 Feb 3 15:59:52 screwdriver kernel: md: scsi/host4/bus0/target7/lun0/part1 [events: 00000019]<6>(write) scsi/host4/bus0/target7/lun0/part1's sb offset: 35005504 Feb 3 15:59:52 screwdriver kernel: md: scsi/host4/bus0/target6/lun0/part1 [events: 00000019]<6>(write) scsi/host4/bus0/target6/lun0/part1's sb offset: 35005504 Feb 3 15:59:52 screwdriver kernel: md: scsi/host4/bus0/target5/lun0/part1 [events: 00000019]<6>(write) scsi/host4/bus0/target5/lun0/part1's sb offset: 35005504 Feb 3 15:59:52 screwdriver kernel: md: scsi/host4/bus0/target4/lun0/part1 [events: 00000019]<6>(write) scsi/host4/bus0/target4/lun0/part1's sb offset: 35005504 Feb 3 15:59:52 screwdriver kernel: md: scsi/host4/bus0/target3/lun0/part1 [events: 00000019]<6>(write) scsi/host4/bus0/target3/lun0/part1's sb offset: 35005504 Feb 3 15:59:52 screwdriver kernel: md: scsi/host4/bus0/target2/lun0/part1 [events: 00000019]<6>(write) scsi/host4/bus0/target2/lun0/part1's sb offset: 35005504 Feb 3 15:59:52 screwdriver kernel: md: scsi/host4/bus0/target1/lun0/part1 [events: 00000019]<6>(write) scsi/host4/bus0/target1/lun0/part1's sb offset: 35005504 --snip-- - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
