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SubjectWhat is 2.4.0-test10: md1 has overlapping physical units with md2!
Is this something to be concerned about? It sounds like a disaster waiting
to happen from the message. This is on 2 systems (with similar disk setups
[same other than size]).



dmesg from bootup:
Nov 18 16:31:01 mwg kernel: md driver 0.90.0 MAX_MD_DEVS=256, MAX_REAL=12
Nov 18 16:31:01 mwg kernel: raid1 personality registered
Nov 18 16:31:01 mwg kernel: md.c: sizeof(mdp_super_t) = 4096
Nov 18 16:31:01 mwg kernel: autodetecting RAID arrays
Nov 18 16:31:01 mwg kernel: (read) ide/host0/bus0/target0/lun0/part1's sb offset: 524544 [events: 00000056]
Nov 18 16:31:01 mwg kernel: (read) ide/host0/bus0/target0/lun0/part3's sb offset: 4194688 [events: 00000055]
Nov 18 16:31:01 mwg kernel: (read) ide/host0/bus0/target0/lun0/part4's sb offset: 24771008 [events: 00000058]
Nov 18 16:31:01 mwg kernel: (read) ide/host0/bus1/target0/lun0/part1's sb offset: 524544 [events: 00000056]
Nov 18 16:31:01 mwg kernel: (read) ide/host0/bus1/target0/lun0/part3's sb offset: 4194688 [events: 00000055]
Nov 18 16:31:01 mwg kernel: (read) ide/host0/bus1/target0/lun0/part4's sb offset: 24771008 [events: 00000058]
Nov 18 16:31:01 mwg kernel: autorun ...
Nov 18 16:31:01 mwg kernel: considering ide/host0/bus1/target0/lun0/part4 ...
Nov 18 16:31:01 mwg kernel: adding ide/host0/bus1/target0/lun0/part4 ...
Nov 18 16:31:01 mwg kernel: adding ide/host0/bus0/target0/lun0/part4 ...
Nov 18 16:31:01 mwg kernel: created md2
Nov 18 16:31:01 mwg kernel: bind<ide/host0/bus0/target0/lun0/part4,1>
Nov 18 16:31:01 mwg kernel: bind<ide/host0/bus1/target0/lun0/part4,2>
Nov 18 16:31:01 mwg kernel: running: <ide/host0/bus1/target0/lun0/part4><ide/host0/bus0/target0/lun0/part4>
Nov 18 16:31:01 mwg kernel: now!
Nov 18 16:31:01 mwg kernel: ide/host0/bus1/target0/lun0/part4's event counter: 00000058
Nov 18 16:31:01 mwg kernel: ide/host0/bus0/target0/lun0/part4's event counter: 00000058
Nov 18 16:31:01 mwg kernel: md: md2: raid array is not clean -- starting background reconstruction
Nov 18 16:31:01 mwg kernel: md2: max total readahead window set to 124k
Nov 18 16:31:01 mwg kernel: md2: 1 data-disks, max readahead per data-disk: 124k
Nov 18 16:31:01 mwg kernel: raid1: device ide/host0/bus1/target0/lun0/part4 operational as mirror 1
Nov 18 16:31:01 mwg kernel: raid1: device ide/host0/bus0/target0/lun0/part4 operational as mirror 0
Nov 18 16:31:01 mwg kernel: raid1: raid set md2 not clean; reconstructing mirrors
Nov 18 16:31:01 mwg kernel: raid1: raid set md2 active with 2 out of 2 mirrors
Nov 18 16:31:01 mwg kernel: md: updating md2 RAID superblock on device
Nov 18 16:31:01 mwg kernel: ide/host0/bus1/target0/lun0/part4 [events: 00000059](write) ide/host0/bus1/target0/lun0/part4's sb offset: 24771008
Nov 18 16:31:01 mwg kernel: md: syncing RAID array md2
Nov 18 16:31:01 mwg kernel: md: minimum _guaranteed_ reconstruction speed: 100 KB/sec/disc.
Nov 18 16:31:01 mwg kernel: md: using maximum available idle IO bandwith (but not more than 100000 KB/sec) for reconstruction.
Nov 18 16:31:01 mwg kernel: md: using 124k window, over a total of 24771008 blocks.
Nov 18 16:31:01 mwg kernel: ide/host0/bus0/target0/lun0/part4 [events: 00000059](write) ide/host0/bus0/target0/lun0/part4's sb offset: 24771008
Nov 18 16:31:01 mwg kernel: .
Nov 18 16:31:01 mwg kernel: considering ide/host0/bus1/target0/lun0/part3 ...
Nov 18 16:31:02 mwg kernel: adding ide/host0/bus1/target0/lun0/part3 ...
Nov 18 16:31:02 mwg kernel: adding ide/host0/bus0/target0/lun0/part3 ...
Nov 18 16:31:02 mwg kernel: created md1
Nov 18 16:31:02 mwg kernel: bind<ide/host0/bus0/target0/lun0/part3,1>
Nov 18 16:31:02 mwg kernel: bind<ide/host0/bus1/target0/lun0/part3,2>
Nov 18 16:31:02 mwg kernel: running: <ide/host0/bus1/target0/lun0/part3><ide/host0/bus0/target0/lun0/part3>
Nov 18 16:31:02 mwg kernel: now!
Nov 18 16:31:02 mwg kernel: ide/host0/bus1/target0/lun0/part3's event counter: 00000055
Nov 18 16:31:02 mwg kernel: ide/host0/bus0/target0/lun0/part3's event counter: 00000055
Nov 18 16:31:02 mwg kernel: md: md1: raid array is not clean -- starting background reconstruction
Nov 18 16:31:02 mwg kernel: md1: max total readahead window set to 124k
Nov 18 16:31:02 mwg kernel: md1: 1 data-disks, max readahead per data-disk: 124k
Nov 18 16:31:02 mwg kernel: raid1: device ide/host0/bus1/target0/lun0/part3 operational as mirror 1
Nov 18 16:31:02 mwg kernel: raid1: device ide/host0/bus0/target0/lun0/part3 operational as mirror 0
Nov 18 16:31:02 mwg kernel: raid1: raid set md1 not clean; reconstructing mirrors
Nov 18 16:31:02 mwg kernel: raid1: raid set md1 active with 2 out of 2 mirrors
Nov 18 16:31:02 mwg kernel: md: updating md1 RAID superblock on device
Nov 18 16:31:02 mwg kernel: ide/host0/bus1/target0/lun0/part3 [events: 00000056](write) ide/host0/bus1/target0/lun0/part3's sb offset: 4194688
Nov 18 16:31:02 mwg kernel: md: serializing resync, md1 has overlapping physical units with md2!
Nov 18 16:31:02 mwg kernel: ide/host0/bus0/target0/lun0/part3 [events: 00000056](write) ide/host0/bus0/target0/lun0/part3's sb offset: 4194688
Nov 18 16:31:02 mwg kernel: .
Nov 18 16:31:02 mwg kernel: considering ide/host0/bus1/target0/lun0/part1 ...
Nov 18 16:31:02 mwg kernel: adding ide/host0/bus1/target0/lun0/part1 ...
Nov 18 16:31:02 mwg kernel: adding ide/host0/bus0/target0/lun0/part1 ...
Nov 18 16:31:02 mwg kernel: created md0
Nov 18 16:31:02 mwg kernel: bind<ide/host0/bus0/target0/lun0/part1,1>
Nov 18 16:31:02 mwg kernel: bind<ide/host0/bus1/target0/lun0/part1,2>
Nov 18 16:31:02 mwg kernel: running: <ide/host0/bus1/target0/lun0/part1><ide/host0/bus0/target0/lun0/part1>
Nov 18 16:31:02 mwg kernel: now!
Nov 18 16:31:02 mwg kernel: ide/host0/bus1/target0/lun0/part1's event counter: 00000056
Nov 18 16:31:02 mwg kernel: ide/host0/bus0/target0/lun0/part1's event counter: 00000056
Nov 18 16:31:02 mwg kernel: md: md0: raid array is not clean -- starting background reconstruction
Nov 18 16:31:02 mwg kernel: md0: max total readahead window set to 124k
Nov 18 16:31:02 mwg kernel: md0: 1 data-disks, max readahead per data-disk: 124k
Nov 18 16:31:02 mwg kernel: raid1: device ide/host0/bus1/target0/lun0/part1 operational as mirror 1
Nov 18 16:31:02 mwg kernel: raid1: device ide/host0/bus0/target0/lun0/part1 operational as mirror 0
Nov 18 16:31:02 mwg kernel: raid1: raid set md0 not clean; reconstructing mirrors
Nov 18 16:31:02 mwg kernel: raid1: raid set md0 active with 2 out of 2 mirrors
Nov 18 16:31:02 mwg kernel: md: updating md0 RAID superblock on device
Nov 18 16:31:02 mwg kernel: ide/host0/bus1/target0/lun0/part1 [events: 00000057](write) ide/host0/bus1/target0/lun0/part1's sb offset: 524544
Nov 18 16:31:02 mwg kernel: md: serializing resync, md0 has overlapping physical units with md2!
Nov 18 16:31:02 mwg kernel: ide/host0/bus0/target0/lun0/part1 [events: 00000057](write) ide/host0/bus0/target0/lun0/part1's sb offset: 524544
Nov 18 16:31:02 mwg kernel: .
Nov 18 16:31:02 mwg kernel: ... autorun DONE.




fdisk:
/dev/hda:
kernel version 132096

Command (m for help):
Disk /dev/hda: 16 heads, 63 sectors, 59554 cylinders
Units = cylinders of 1008 * 512 bytes

Device Boot Start End Blocks Id System
/dev/hda1 1 1041 524632+ fd Linux raid autodetect
/dev/hda2 1042 2082 524664 82 Linux swap
/dev/hda3 2083 10405 4194792 fd Linux raid autodetect
/dev/hda4 10406 59554 24771096 fd Linux raid autodetect

Command (m for help):
/dev/hdc:
kernel version 132096

Command (m for help):
Disk /dev/hdc: 16 heads, 63 sectors, 59554 cylinders
Units = cylinders of 1008 * 512 bytes

Device Boot Start End Blocks Id System
/dev/hdc1 1 1041 524632+ fd Linux raid autodetect
/dev/hdc2 1042 2082 524664 82 Linux swap
/dev/hdc3 2083 10405 4194792 fd Linux raid autodetect
/dev/hdc4 10406 59554 24771096 fd Linux raid autodetect

Command (m for help):



/etc/raidtab:
raiddev /dev/md/0
raid-level 1
nr-raid-disks 2
nr-spare-disks 0
chunk-size 32
persistent-superblock 1
device /dev/ide/host0/bus0/target0/lun0/part1
raid-disk 0
device /dev/ide/host0/bus1/target0/lun0/part1
raid-disk 1
raiddev /dev/md/1
raid-level 1
nr-raid-disks 2
nr-spare-disks 0
chunk-size 32
persistent-superblock 1
device /dev/ide/host0/bus0/target0/lun0/part3
raid-disk 0
device /dev/ide/host0/bus1/target0/lun0/part3
raid-disk 1
raiddev /dev/md/2
raid-level 1
nr-raid-disks 2
nr-spare-disks 0
chunk-size 32
persistent-superblock 1
device /dev/ide/host0/bus0/target0/lun0/part4
raid-disk 0
device /dev/ide/host0/bus1/target0/lun0/part4
raid-disk 1




/proc/mdstat:
Personalities : [raid1]
read_ahead 1024 sectors
md0 : active raid1 ide/host0/bus1/target0/lun0/part1[1] ide/host0/bus0/target0/lun0/part1[0]
524544 blocks [2/2] [UU]

md1 : active raid1 ide/host0/bus1/target0/lun0/part3[1] ide/host0/bus0/target0/lun0/part3[0]
4194688 blocks [2/2] [UU]

md2 : active raid1 ide/host0/bus1/target0/lun0/part4[1] ide/host0/bus0/target0/lun0/part4[0]
24771008 blocks [2/2] [UU]

unused devices: <none>
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