This is a known issue and a patch has been submitted. I'm not sure when it is scheduled to appear in the kernel. There will be no actual disk I/O during the raid check and the array will not actually be checked. --Larkin On 4/2/2012 4:21 PM, Mathias Burén wrote: > Hi mailing list, > > On my old > > model name : Intel(R) Atom(TM) CPU 330 @ 1.60GHz > > I'm currently seeing a resync speed of around 200MB/s! > > ~ $ cat /proc/mdstat > Personalities : [raid6] [raid5] [raid4] > md0 : active raid6 sdg1[0] sde1[7] sdh1[8] sdf1[5] sdc1[3] sdd1[4] sdb1[9] > 9751756800 blocks super 1.2 level 6, 64k chunk, algorithm 2 > [7/7] [UUUUUUU] > [======>..............] check = 32.6% (636923520/1950351360) > finish=111.2min speed=196740K/sec > > unused devices: <none> > > This ia almost 10 times higher than what I used to see on 3.2 and > earlier. What's that about? The array is a 7 drive RAID6: > > $ sudo mdadm -D /dev/md0 > /dev/md0: > Version : 1.2 > Creation Time : Tue Oct 19 08:58:41 2010 > Raid Level : raid6 > Array Size : 9751756800 (9300.00 GiB 9985.80 GB) > Used Dev Size : 1950351360 (1860.00 GiB 1997.16 GB) > Raid Devices : 7 > Total Devices : 7 > Persistence : Superblock is persistent > > Update Time : Mon Apr 2 22:18:14 2012 > State : clean, checking > Active Devices : 7 > Working Devices : 7 > Failed Devices : 0 > Spare Devices : 0 > > Layout : left-symmetric > Chunk Size : 64K > > Check Status : 32% complete > > Name : ion:0 (local to host ion) > UUID : e6595c64:b3ae90b3:f01133ac:3f402d20 > Events : 6773811 > > Number Major Minor RaidDevice State > 0 8 97 0 active sync /dev/sdg1 > 9 8 17 1 active sync /dev/sdb1 > 4 8 49 2 active sync /dev/sdd1 > 3 8 33 3 active sync /dev/sdc1 > 5 8 81 4 active sync /dev/sdf1 > 8 8 113 5 active sync /dev/sdh1 > 7 8 65 6 active sync /dev/sde1 > > Best regards, > Mathias > -- > 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 > -- 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
