On Mon, 10 Sep 2012 09:11:54 +1000 Adam Goryachev <adam@xxxxxxxxxxxxxxxxxxxxxx> wrote: > On 09/07/2012 07:41 PM, Ralf Müller wrote: > > Am 07.09.2012 um 06:41 schrieb Adam Goryachev: > > > >> I have a MD raid6 with 5 drives, and every now and then one (random) > >> drive will fail. I've done all sorts of checks, and the drive is > >> actually working fine, so I suspect an issue with the Linux driver > >> and/or SATA controller (onboard). > >> > >> It isn't really relevant to the question, but I'll run through the sata > >> stuff, in case anyone can point out a simple solution to stop this from > >> happening (yes, a new server is on the way, but with budgets etc, that > >> could be some time away. This issue has happened for years, but we are > >> becoming more active with these failures now). > >> > >> 00:0e.0 IDE interface: nVidia Corporation MCP51 Serial ATA Controller > >> (rev a1) > >> 00:0f.0 IDE interface: nVidia Corporation MCP51 Serial ATA Controller > >> (rev a1) > >> 01:07.0 RAID bus controller: Silicon Image, Inc. Adaptec AAR-1210SA SATA > >> HostRAID Controller (rev 02) > >> > >> cat /proc/mdstat > >> Personalities : [raid1] [raid6] [raid5] [raid4] > >> md2 : active raid6 sdh1[5] sdg1[4] sdf1[0] sdd1[6](F) sde1[2] sda1[1] > >> 5860535808 blocks level 6, 64k chunk, algorithm 2 [5/4] [UUU_U] > >> [>....................] recovery = 1.4% (28663240/1953511936) > >> finish=486.5min speed=65938K/sec > >> > >> > >> > >> Since I know sdh is actually almost up to date, is there some way to > >> re-add it, and only have to sync the portions of the disk which have > >> changed? > > > > Besides all the stuff about fix your server, a raid is not a backup and you risk your data - simply add a write intent bitmap: > > > > # mdadm /dev/md2 --grow bitmap=internal > > > mdadm /dev/md2 --grow bitmap=internal > mdadm: can only add devices to linear arrays Check the man page.... mdadm /dev/md2 --grow --bitmap=internal NeilBrown > > md2 is raid6: > md2 : active raid6 sdh1[3] sdg1[4] sdf1[0] sde1[2] sda1[1] > 5860535808 blocks level 6, 64k chunk, algorithm 2 [5/5] [UUUUU] > > Regards, > Adam > > -- > 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
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