Hello, I'm currently fighting a raid problem with a wired log as follows: (md19 is a 3-devices raid5) ...... Aug 13 09:40:06 node-0 kernel: md19: detected capacity change from 2147483648 to 0 Aug 13 09:40:06 node-0 kernel: md: md19 stopped. Aug 13 09:40:06 node-0 kernel: md: unbind<dm-117> Aug 13 09:40:06 node-0 kernel: md: export_rdev(dm-117) Aug 13 09:40:06 node-0 kernel: md: unbind<dm-420> Aug 13 09:40:06 node-0 kernel: md: bind<dm-420> Aug 13 09:40:06 node-0 kernel: raid5: device dm-420 operational as raid disk 1 Aug 13 09:40:06 node-0 kernel: raid5: device dm-304 operational as raid disk 0 Aug 13 09:40:06 node-0 kernel: raid5: allocated 3230kB for md19 Aug 13 09:40:06 node-0 kernel: 1: w=1 pa=0 pr=3 m=1 a=0 r=3 op1=0 op2=0 Aug 13 09:40:06 node-0 kernel: 0: w=2 pa=0 pr=3 m=1 a=0 r=3 op1=0 op2=0 Aug 13 09:40:06 node-0 kernel: raid5: raid level 4 set md19 active with 2 out of 3 devices, algorithm 0 Aug 13 09:40:06 node-0 kernel: md19: bitmap initialized from disk: read 1/1 pages, set 0 bits Aug 13 09:40:06 node-0 kernel: created bitmap (1 pages) for device md19 Aug 13 09:40:06 node-0 kernel: md19: detected capacity change from 0 to 2147483648 Aug 13 09:40:06 node-0 kernel: md19: detected capacity change from 0 to 2147483648 Aug 13 09:40:06 node-0 kernel: md19: unknown partition table Aug 13 09:40:06 node-0 kernel: md: bind<dm-117> Aug 13 09:40:06 node-0 kernel: RAID5 conf printout: Aug 13 09:40:06 node-0 kernel: --- rd:3 wd:2 Aug 13 09:40:06 node-0 kernel: disk 0, o:1, dev:dm-304 Aug 13 09:40:06 node-0 kernel: disk 1, o:1, dev:dm-420 Aug 13 09:40:06 node-0 kernel: disk 2, o:1, dev:dm-117 Aug 13 09:40:06 node-0 kernel: md: recovery of RAID array md19 Aug 13 09:40:06 node-0 kernel: md: minimum _guaranteed_ speed: 1000 KB/sec/disk. Aug 13 09:40:06 node-0 kernel: md: using maximum available idle IO bandwidth (but not more than 400000 KB/sec) for recovery. Aug 13 09:40:06 node-0 kernel: md: using 128k window, over a total of 1048576 blocks. Aug 13 09:40:06 node-0 kernel: md: md19: recovery done. Aug 13 09:40:06 node-0 kernel: RAID5 conf printout: Aug 13 09:40:06 node-0 kernel: --- rd:3 wd:3 Aug 13 09:40:06 node-0 kernel: disk 0, o:1, dev:dm-304 Aug 13 09:40:06 node-0 kernel: disk 1, o:1, dev:dm-420 Aug 13 09:40:06 node-0 kernel: disk 2, o:1, dev:dm-117 An hour later, something wrong with dm-304. Aug 13 10:57:29 node-0 kernel: raid5: Disk failure on dm-304, disabling device. Aug 13 10:57:29 node-0 kernel: raid5: Operation continuing on 2 devices. Aug 13 10:57:29 node-0 kernel: md: recovery of RAID array md19 Aug 13 10:57:29 node-0 kernel: md: minimum _guaranteed_ speed: 1000 KB/sec/disk. Aug 13 10:57:29 node-0 kernel: md: using maximum available idle IO bandwidth (but not more than 400000 KB/sec) for recovery. Aug 13 10:57:29 node-0 kernel: md: using 128k window, over a total of 1048576 blocks. Aug 13 10:57:29 node-0 kernel: md: resuming recovery of md19 from checkpoint. Aug 13 10:57:29 node-0 kernel: md: md19: recovery done. Aug 13 10:57:29 node-0 kernel: RAID5 conf printout: Aug 13 10:57:29 node-0 kernel: --- rd:3 wd:2 Aug 13 10:57:29 node-0 kernel: disk 0, o:0, dev:dm-304 Aug 13 10:57:29 node-0 kernel: disk 1, o:1, dev:dm-420 Aug 13 10:57:29 node-0 kernel: disk 2, o:1, dev:dm-117 And the wired thing begins. The log as follows, was printed thousands of time. Aug 13 10:57:29 node-0 kernel: md: recovery of RAID array md19 Aug 13 10:57:29 node-0 kernel: md: minimum _guaranteed_ speed: 1000 KB/sec/disk. Aug 13 10:57:29 node-0 kernel: md: using maximum available idle IO bandwidth (but not more than 400000 KB/sec) for recovery. Aug 13 10:57:29 node-0 kernel: md: using 128k window, over a total of 1048576 blocks. Aug 13 10:57:29 node-0 kernel: md: resuming recovery of md19 from checkpoint. Aug 13 10:57:29 node-0 kernel: md: md19: recovery done. Aug 13 10:57:29 node-0 kernel: RAID5 conf printout: Aug 13 10:57:29 node-0 kernel: --- rd:3 wd:2 Aug 13 10:57:29 node-0 kernel: disk 0, o:0, dev:dm-304 Aug 13 10:57:29 node-0 kernel: disk 1, o:1, dev:dm-420 Aug 13 10:57:29 node-0 kernel: disk 2, o:1, dev:dm-117 finally, it finished. Aug 13 10:57:30 node-0 kernel: md: recovery of RAID array md19 Aug 13 10:57:30 node-0 kernel: md: minimum _guaranteed_ speed: 1000 KB/sec/disk. Aug 13 10:57:30 node-0 kernel: md: using maximum available idle IO bandwidth (but not more than 400000 KB/sec) for recovery. Aug 13 10:57:30 node-0 kernel: md: using 128k window, over a total of 1048576 blocks. Aug 13 10:57:30 node-0 kernel: md: resuming recovery of md19 from checkpoint. Aug 13 10:57:30 node-0 kernel: md: md19: recovery done. Aug 13 10:57:30 node-0 kernel: end_request: I/O error, dev dm-297, sector 2048 Aug 13 10:57:30 node-0 kernel: end_request: I/O error, dev dm-297, sector 1152 Aug 13 10:57:30 node-0 kernel: end_request: I/O error, dev dm-297, sector 512 Aug 13 10:57:30 node-0 kernel: end_request: I/O error, dev dm-297, sector 0 Aug 13 10:57:30 node-0 kernel: RAID5 conf printout: Aug 13 10:57:30 node-0 kernel: --- rd:3 wd:2 Aug 13 10:57:30 node-0 kernel: disk 0, o:0, dev:dm-304 Aug 13 10:57:30 node-0 kernel: disk 1, o:1, dev:dm-420 Aug 13 10:57:30 node-0 kernel: disk 2, o:1, dev:dm-117 Aug 13 10:57:30 node-0 kernel: RAID5 conf printout: Aug 13 10:57:30 node-0 kernel: --- rd:3 wd:2 Aug 13 10:57:30 node-0 kernel: disk 0, o:0, dev:dm-304 Aug 13 10:57:30 node-0 kernel: disk 1, o:1, dev:dm-420 Aug 13 10:57:30 node-0 kernel: disk 2, o:1, dev:dm-117 Aug 13 10:57:30 node-0 kernel: RAID5 conf printout: Aug 13 10:57:30 node-0 kernel: --- rd:3 wd:2 Aug 13 10:57:30 node-0 kernel: disk 1, o:1, dev:dm-420 Aug 13 10:57:30 node-0 kernel: disk 2, o:1, dev:dm-117 and then, dm-304, dm-420, dm-117 were unbound and exported. my system is centos 6.0 and the version of mdadm is 3.2.2 . This problem confuses me for a long time. Who can tell me what happened? -- 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
