Jan 3 01:24:12 chaos kernel: [ 830.038426] md: bug in file
drivers/md/md.c, line 1662
Jan 3 01:24:12 chaos kernel: [ 830.038524]
Jan 3 01:24:12 chaos kernel: [ 830.038608]
md:^I**********************************
Jan 3 01:24:12 chaos kernel: [ 830.038697] md:^I* <COMPLETE RAID
STATE PRINTOUT> *
Jan 3 01:24:12 chaos kernel: [ 830.038787]
md:^I**********************************
Jan 3 01:24:12 chaos kernel: [ 830.038879] md0: <sdd2><sdc2><sdb2><sda2>
Jan 3 01:24:12 chaos kernel: [ 830.039116] md: rdev sdd2,
SZ:219777152 F:0 S:1 DN:3
Jan 3 01:24:12 chaos kernel: [ 830.039206] md: rdev superblock:
Jan 3 01:24:12 chaos kernel: [ 830.039297] md: SB: (V:1.0.0)
ID:<ad8e8baf.00000000.00000000.00000
000> CT:06707edf
Jan 3 01:24:12 chaos kernel: [ 830.039448] md: L-496822052
S00000048 ND:0 RD:0 md0 LO:65536 CS
:196610
Jan 3 01:24:12 chaos kernel: [ 830.039547] md: UT:00000000 ST:0
AD:439554320 WD:0 FD:439554448
SD:0 CSUM:00000000 E:00000000
Jan 3 01:24:12 chaos kernel: [ 830.039700] D 0:
DISK<N:-1,(-1,-1),R:-1,S:-1>
Jan 3 01:24:12 chaos kernel: [ 830.039851] D 1:
DISK<N:-1,(-1,-1),R:-1,S:-1>
Jan 3 01:24:12 chaos kernel: [ 830.039971] D 2:
DISK<N:-1,(-1,-1),R:-1,S:-1>
Jan 3 01:24:12 chaos kernel: [ 830.040093] D 3:
DISK<N:-1,(-1,-1),R:-1,S:-1>
Jan 3 01:24:12 chaos kernel: [ 830.040221] md: THIS:
DISK<N:0,(0,0),R:0,S:0>
Jan 3 01:24:12 chaos kernel: [ 830.040345] md: rdev sdc2,
SZ:219777152 F:0 S:1 DN:2
Jan 3 01:24:12 chaos kernel: [ 830.040438] md: rdev superblock:
Jan 3 01:24:12 chaos kernel: [ 830.040530] md: SB: (V:1.0.0)
ID:<ad8e8baf.00000000.00000000.00000
000> CT:06707edf
Jan 3 01:24:12 chaos kernel: [ 830.040683] md: L-496822052
S00000048 ND:0 RD:0 md0 LO:65536 CS
:196610
Jan 3 01:24:12 chaos kernel: [ 830.040782] md: UT:00000000 ST:0
AD:439554320 WD:0 FD:439554448
SD:0 CSUM:00000000 E:00000000
Jan 3 01:24:12 chaos kernel: [ 830.040932] D 0:
DISK<N:-1,(-1,-1),R:-1,S:-1>
Jan 3 01:24:12 chaos kernel: [ 830.041083] D 1:
DISK<N:-1,(-1,-1),R:-1,S:-1>
Jan 3 01:24:12 chaos kernel: [ 830.042321] D 2:
DISK<N:-1,(-1,-1),R:-1,S:-1>
Jan 3 01:24:12 chaos kernel: [ 830.042441] D 3:
DISK<N:-1,(-1,-1),R:-1,S:-1>
Jan 3 01:24:12 chaos kernel: [ 830.042564] md: THIS:
DISK<N:0,(0,0),R:0,S:0>
Jan 3 01:24:12 chaos kernel: [ 830.042687] md: rdev sdb2,
SZ:219777152 F:0 S:1 DN:1
Jan 3 01:24:12 chaos kernel: [ 830.042779] md: rdev superblock:
Jan 3 01:24:12 chaos kernel: [ 830.042870] md: SB: (V:1.0.0)
ID:<ad8e8baf.00000000.00000000.00000
000> CT:06707edf
Jan 3 01:24:12 chaos kernel: [ 830.043022] md: L-496822052
S00000048 ND:0 RD:0 md0 LO:65536 CS
:196610
Jan 3 01:24:12 chaos kernel: [ 830.043121] md: UT:00000000 ST:0
AD:439554320 WD:0 FD:439554448
SD:0 CSUM:00000000 E:00000000
Jan 3 01:24:12 chaos kernel: [ 830.043274] D 0:
DISK<N:-1,(-1,-1),R:-1,S:-1>
Jan 3 01:24:12 chaos kernel: [ 830.043424] D 1:
DISK<N:-1,(-1,-1),R:-1,S:-1>
Jan 3 01:24:12 chaos kernel: [ 830.043544] D 2:
DISK<N:-1,(-1,-1),R:-1,S:-1>
Jan 3 01:24:12 chaos kernel: [ 830.043666] D 3:
DISK<N:-1,(-1,-1),R:-1,S:-1>
Jan 3 01:24:12 chaos kernel: [ 830.043792] md: THIS:
DISK<N:0,(0,0),R:0,S:0>
Jan 3 01:24:12 chaos kernel: [ 830.043917] md: rdev sda2,
SZ:219777152 F:0 S:1 DN:0
Jan 3 01:24:12 chaos kernel: [ 830.044009] md: rdev superblock:
Jan 3 01:24:12 chaos kernel: [ 830.044095] md: SB: (V:1.0.0)
ID:<ad8e8baf.00000000.00000000.00000
000> CT:06707edf
Jan 3 01:24:12 chaos kernel: [ 830.044235] md: L-496822052
S00000048 ND:0 RD:0 md0 LO:65536 CS
:196610
Jan 3 01:24:12 chaos kernel: [ 830.044327] md: UT:00000000 ST:0
AD:439554320 WD:0 FD:439554448
SD:0 CSUM:00000000 E:00000000
Jan 3 01:24:12 chaos kernel: [ 830.044467] D 0:
DISK<N:-1,(-1,-1),R:-1,S:-1>
Jan 3 01:24:12 chaos kernel: [ 830.044612] D 1:
DISK<N:-1,(-1,-1),R:-1,S:-1>
Jan 3 01:24:12 chaos kernel: [ 830.044727] D 2:
DISK<N:-1,(-1,-1),R:-1,S:-1>
Jan 3 01:24:12 chaos kernel: [ 830.044843] D 3:
DISK<N:-1,(-1,-1),R:-1,S:-1>
Jan 3 01:24:12 chaos kernel: [ 830.044963] md: THIS:
DISK<N:0,(0,0),R:0,S:0>
Jan 3 01:24:12 chaos kernel: [ 830.045078]
md:^I**********************************
Jan 3 01:24:12 chaos kernel: [ 830.045163]
repeated over and over.
kernel 2.6.19.1 with SATA drives on a promise tx4 300 controller.
Which leads to this code:
if (!mddev->events) {
/*
* oops, this 64-bit counter should never wrap.
* Either we are in around ~1 trillion A.C., assuming
* 1 reboot per second, or we have a bug:
*/
MD_BUG();
mddev->events --;
}
... which seems wrong to me. if mddev->events==0, won't
mddev->events-- cause it to wrap around again shortly?
Order of events:
Create raid5 1 drive short, realize resync will take forever, delete raid5,
re-create with 'assume clean', add spare, grow into the spare,
decide it will still take too long on a 750gb array, delete the whole thing
re-create with assume-clean, realize I need non-software-raid
partition for booting,
delete, repartition, re-create, allow it to work on resync this time.
Copy data, reboot to pull the old drives out (resync not completed),
can't boot because of old buggy motherboard, use a rescue kernel
(2.6._18_.1) it refuses to start the array with --assemble, due to the
integer overflow.
Yes, it was not pretty, I was testing the different parts of mdadm
before entrusting my data to it.
I did solve the problem: zeroed the superblocks, created with a
missing drive and hot-added it, now it's rebuilding with no more
kernel errors. Event counter is at 879 now, so that should be ok.
I'll see how it handles a reboot and autostart tomorrow.
--Dan
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