-----Original Message----- From: NeilBrown [mailto:neilb@xxxxxxx] Sent: Monday, November 11, 2013 4:58 PM To: Justin Piszcz Cc: joystick; linux-raid Subject: Re: 3.12: raid-1 mismatch_cnt question On Mon, 11 Nov 2013 13:52:23 -0500 Justin Piszcz <jpiszcz@xxxxxxxxxxxxxxx> wrote: [ .. ] I cannot promise that my code is bug free, but if it wasn't getting this locking correct, that would be a very serious bug. I think this possibility is quite unlikely. NeilBrown -- FWIW: Mount points/options: # grep md /etc/fstab /dev/md0 /boot ext3 defaults 0 0 /dev/md1 / ext4 defaults,discard 0 0 Both SSD's are plugged directly into the motherboard's 2 x 6Gbps ports (Intel chipset/X9SRL-F mobo) # mdadm --detail /dev/md0 /dev/md0: Version : 0.90 Creation Time : Fri Nov 2 10:10:14 2012 Raid Level : raid1 Array Size : 1048512 (1024.11 MiB 1073.68 MB) Used Dev Size : 1048512 (1024.11 MiB 1073.68 MB) Raid Devices : 2 Total Devices : 2 Preferred Minor : 0 Persistence : Superblock is persistent Update Time : Mon Nov 11 13:50:08 2013 State : clean Active Devices : 2 Working Devices : 2 Failed Devices : 0 Spare Devices : 0 UUID : 08624db8:4840de94:c44c77eb:7ee19756 Events : 0.441 Number Major Minor RaidDevice State 0 8 33 0 active sync /dev/sdc1 1 8 17 1 active sync /dev/sdb1 # mdadm --detail /dev/md1 /dev/md1: Version : 0.90 Creation Time : Fri Nov 2 10:10:27 2012 Raid Level : raid1 Array Size : 233381376 (222.57 GiB 238.98 GB) Used Dev Size : 233381376 (222.57 GiB 238.98 GB) Raid Devices : 2 Total Devices : 2 Preferred Minor : 1 Persistence : Superblock is persistent Update Time : Mon Nov 11 17:12:37 2013 State : clean Active Devices : 2 Working Devices : 2 Failed Devices : 0 Spare Devices : 0 UUID : 03a64f68:595e7c61:c44c77eb:7ee19756 Events : 0.340396 Number Major Minor RaidDevice State 0 8 34 0 active sync /dev/sdc2 1 8 18 1 active sync /dev/sdb2 # cat /proc/mdstat Personalities : [raid1] md1 : active raid1 sdc2[0] sdb2[1] 233381376 blocks [2/2] [UU] md0 : active raid1 sdc1[0] sdb1[1] 1048512 blocks [2/2] [UU] unused devices: <none> At boot: [ 12.579770] md: raid1 personality registered for level 1 [ 13.777189] md: Waiting for all devices to be available before autodetect [ 13.790829] md: If you don't use raid, use raid=noautodetect [ 13.804604] md: Autodetecting RAID arrays. [ 13.820461] md: Scanned 4 and added 4 devices. [ 13.834231] md: autorun ... [ 13.847869] md: considering sdc2 ... [ 13.861458] md: adding sdc2 ... [ 13.874984] md: sdc1 has different UUID to sdc2 [ 13.888487] md: adding sdb2 ... [ 13.901934] md: sdb1 has different UUID to sdc2 [ 13.915469] md: created md1 [ 13.928790] md: bind<sdb2> [ 13.942004] md: bind<sdc2> [ 13.955088] md: running: <sdc2><sdb2> [ 13.968212] md/raid1:md1: active with 2 out of 2 mirrors [ 13.981297] md1: detected capacity change from 0 to 238982529024 [ 13.994501] md: considering sdc1 ... [ 14.007674] md: adding sdc1 ... [ 14.020775] md: adding sdb1 ... [ 14.033718] md: created md0 [ 14.046545] md: bind<sdb1> [ 14.059301] md: bind<sdc1> [ 14.071918] md: running: <sdc1><sdb1> [ 14.084644] md/raid1:md0: active with 2 out of 2 mirrors [ 14.097321] md0: detected capacity change from 0 to 1073676288 [ 14.110059] md: ... autorun DONE. [ 14.123179] md1: unknown partition table [ 14.138285] EXT4-fs (md1): mounted filesystem with ordered data mode. Opts: (null) [ 14.640887] md0: [ 15.785971] EXT4-fs (md1): re-mounted. Opts: discard [ 15.970284] EXT3-fs (md0): using internal journal [ 15.970285] EXT3-fs (md0): mounted filesystem with writeback data mode Justin. -- 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
