On Tue, 7 Feb 2012 16:02:27 +1100 Richard Herd <2001oddity@xxxxxxxxx> wrote: > Hi Neil, > > Hmm - see you're point about the kernel... > > Kernel updated. I'm now running 2.6.38. > > I went to work on it a bit more under 2.6.38 - I'm not sure here, it > wouldn't take all the disks as before, but this time seems to have > assembled (with --force) using 4 of the disks. > > Trying to re-add the 5th and 6th didn't throw the same warning as > before (failed to re-add and not adding as spare), it said ''re-added > /dev/xxx to /dev/md0' but when checking detail we can see they were > added as spares not as part of the array. That is expected. "--force" just gets you enough to keep going and that is what you have. Hopefully no more errors (keep the air-con ?? or maybe just keep the doors open, depending where you are :-) > > Anyway, with the array assembled and running, I have got the > filesystem mounted and am quickly smashing an rsync to mirror what I > can (8TB, how long could it take? lol). Good news. > > Thanks so much for your help guys - once I got the hint on the kernel > it wasn't too hard to get the array assembled again. Now it's just a > waiting game I guess to see how much of the data is intact. Also, at > what point would those two disks now marked as spare be re-synced into > the array? After the reshape completes? Yes. When the reshape completes, both the spares will get included into the array and recovered together. > > Really appreciate your help :-) And I appreciate nice detailed bug reports - they tend to get more attention. Thanks! NeilBrown > > Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] > [raid4] [raid10] > md0 : active raid6 sde1[6](S) sdg1[7](S) sdc1[1] sdf1[4] sdd1[3] sdb1[2] > 7814047744 blocks super 0.91 level 6, 64k chunk, algorithm 18 > [6/4] [_UUUU_] > [>....................] reshape = 3.9% (78086144/1953511936) > finish=11710.7min speed=2668K/sec > > unused devices: <none> > > > root@raven:~# mdadm --detail /dev/md0 > /dev/md0: > Version : 0.91 > Creation Time : Tue Jul 12 23:05:01 2011 > Raid Level : raid6 > Array Size : 7814047744 (7452.06 GiB 8001.58 GB) > Used Dev Size : 1953511936 (1863.01 GiB 2000.40 GB) > Raid Devices : 6 > Total Devices : 6 > Preferred Minor : 0 > Persistence : Superblock is persistent > > Update Time : Tue Feb 7 15:52:10 2012 > State : clean, degraded, reshaping > Active Devices : 4 > Working Devices : 6 > Failed Devices : 0 > Spare Devices : 2 > > Layout : left-symmetric-6 > Chunk Size : 64K > > Reshape Status : 3% complete > New Layout : left-symmetric > > UUID : 9a76d1bd:2aabd685:1fc5fe0e:7751cfd7 (local to host raven) > Events : 0.1850269 > > Number Major Minor RaidDevice State > 0 0 0 0 removed > 1 8 33 1 active sync /dev/sdc1 > 2 8 17 2 active sync /dev/sdb1 > 3 8 49 3 active sync /dev/sdd1 > 4 8 81 4 active sync /dev/sdf1 > 5 0 0 5 removed > > 6 8 65 - spare /dev/sde1 > 7 8 97 - spare /dev/sdg1 > > > > > On Tue, Feb 7, 2012 at 3:25 PM, NeilBrown <neilb@xxxxxxx> wrote: > > On Tue, 7 Feb 2012 14:50:57 +1100 Richard Herd <2001oddity@xxxxxxxxx> wrote: > > > >> Hi Neil, > >> > >> OK, git head is: mdadm-3.2.3-21-gda8fe5a > >> > >> I have 8 disks. They get muddled about each boot (an issue I have > >> never addressed). Ignore sde (esata HD) and sdh (usb boot). > >> > >> It seems even with --force, dmesg always reports 'kicking non-fresh > >> sdc/g1 from array!'. Leaving sdg out as suggested by Phil doesn't > >> help unfortunately. > >> > >> root@raven:/neil/mdadm# ./mdadm -Avvv --force > >> --backup-file=/usb/md0.backup /dev/md0 /dev/sda1 /dev/sdb1 /dev/sdc1 > >> /dev/sdd1 /dev/sdf1 /dev/sdg1 > >> mdadm: looking for devices for /dev/md0 > >> mdadm: /dev/sda1 is identified as a member of /dev/md0, slot 2. > >> mdadm: /dev/sdb1 is identified as a member of /dev/md0, slot 1. > >> mdadm: /dev/sdc1 is identified as a member of /dev/md0, slot 3. > >> mdadm: /dev/sdd1 is identified as a member of /dev/md0, slot 5. > >> mdadm: /dev/sdf1 is identified as a member of /dev/md0, slot 4. > >> mdadm: /dev/sdg1 is identified as a member of /dev/md0, slot 0. > >> mdadm:/dev/md0 has an active reshape - checking if critical section > >> needs to be restored > >> mdadm: accepting backup with timestamp 1328559119 for array with > >> timestamp 1328567549 > >> mdadm: restoring critical section > >> mdadm: added /dev/sdg1 to /dev/md0 as 0 > >> mdadm: added /dev/sda1 to /dev/md0 as 2 > >> mdadm: added /dev/sdc1 to /dev/md0 as 3 > >> mdadm: added /dev/sdf1 to /dev/md0 as 4 > >> mdadm: added /dev/sdd1 to /dev/md0 as 5 > >> mdadm: added /dev/sdb1 to /dev/md0 as 1 > >> mdadm: failed to RUN_ARRAY /dev/md0: Input/output error > > > > > > Hmmm.... maybe your kernel isn't quite doing the right thing. > > commit 674806d62fb02a22eea948c9f1b5e58e0947b728 is important. > > It is in 2.6.35. What kernel are you running? > > Definitely something older given the "1: w=1 pa=18...." messages. They > > disappear in 2.6.34. > > > > So I'm afraid you're going to need a new kernel. > > > > NeilBrown > > > > > > > > > >> > >> and dmesg: > >> [13964.591801] md: bind<sdg1> > >> [13964.595371] md: bind<sda1> > >> [13964.595668] md: bind<sdc1> > >> [13964.595900] md: bind<sdf1> > >> [13964.599084] md: bind<sdd1> > >> [13964.599652] md: bind<sdb1> > >> [13964.600478] md: kicking non-fresh sdc1 from array! > >> [13964.600493] md: unbind<sdc1> > >> [13964.612138] md: export_rdev(sdc1) > >> [13964.612163] md: kicking non-fresh sdg1 from array! > >> [13964.612183] md: unbind<sdg1> > >> [13964.624077] md: export_rdev(sdg1) > >> [13964.628203] raid5: reshape will continue > >> [13964.628243] raid5: device sdb1 operational as raid disk 1 > >> [13964.628252] raid5: device sdf1 operational as raid disk 4 > >> [13964.628260] raid5: device sda1 operational as raid disk 2 > >> [13964.629614] raid5: allocated 6308kB for md0 > >> [13964.629731] 1: w=1 pa=18 pr=6 m=2 a=2 r=6 op1=0 op2=0 > >> [13964.629742] 5: w=1 pa=18 pr=6 m=2 a=2 r=6 op1=1 op2=0 > >> [13964.629751] 4: w=2 pa=18 pr=6 m=2 a=2 r=6 op1=0 op2=0 > >> [13964.629760] 2: w=3 pa=18 pr=6 m=2 a=2 r=6 op1=0 op2=0 > >> [13964.629767] raid5: not enough operational devices for md0 (3/6 failed) > >> [13964.640403] RAID5 conf printout: > >> [13964.640409] --- rd:6 wd:3 > >> [13964.640416] disk 1, o:1, dev:sdb1 > >> [13964.640423] disk 2, o:1, dev:sda1 > >> [13964.640429] disk 4, o:1, dev:sdf1 > >> [13964.640436] disk 5, o:1, dev:sdd1 > >> [13964.641621] raid5: failed to run raid set md0 > >> [13964.649886] md: pers->run() failed ...
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