Hi NeilBrown, the frozen option did the trick. Thanks ! So far rebuild with no problems. 2 hours rebuilding , 15min sleeping in a loop ... []'s Salatiel On Mon, Nov 12, 2012 at 5:28 PM, NeilBrown <neilb@xxxxxxx> wrote: > On Mon, 12 Nov 2012 16:07:28 +0000 Benjamin ESTRABAUD <be@xxxxxxxxxx> wrote: > >> Hi! >> >> You could setup a cron job that will pause the resync by writing to sysfs: >> >> If your array if "md0": >> >> echo "idle" > /sys/block/md0/md/sync_action > > "idle" is not sufficient. It will stop the recovery, but then it will > immediately start again. > You need "frozen". > > NeilBrown > > >> >> However, this is probably not necessary as the resynced stripes will be >> marked in the bitmap, meaning that if your rebuild fails, re-assembling >> the array should restart the resync from where it stopped. >> >> Regards, >> Ben. >> >> On 12/11/12 12:44, Salatiel Filho wrote: >> > Hi guys, i have an external USB enclosure with 4 disks in RAID5 mode >> > using mdadm. I dont know exactly why but if i use this disks for >> > massive I/O for lots of hours (over 12 hours), linux usually eject >> > some or all disks (causing a faulty in the raid) and remaps them: sdb >> > -> sdf , sdc -> sdg , sdd -> sdh , sde -> sdi >> > Well , this was never exactly a problem because most of the time those >> > disks are idle (just backup), but i had a real disk failure and i will >> > replace the disk. But probably the rebuild process will take a lot >> > more than 12 hours so the chances are that some disk will be ejected >> > and i will be in a trouble situation where a raid5 rebuilding process >> > will probably be stopped by an apparently failure. So my question is: >> > >> > If i get into that situation , will i be able to disassemble and >> > reassemble the disk using the three disks i know are 'fine' and >> > restart the rebuild process from where it stopped ? I have internal >> > bitmap enabled. >> > >> > Is it possible to somehow freeze the rebuild process ? So i could >> > pause the process for a few hours after 8 hours of work for example. >> > >> > The raid will be assembled but umounted during the rebuild proccess. >> > >> > I am using kernel 3.2.30. >> > >> > Thanks !!! >> > >> > >> > []'s >> > Salatiel >> > -- >> > To unsubscribe from this list: send the line "unsubscribe linux-raid" in >> > the body of a message tomajordomo@xxxxxxxxxxxxxxx >> > More majordomo info athttp://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 > -- 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
