On Tue, 28 Oct 2014 15:27:02 +0100 Ethan Wilson <ethan.wilson@xxxxxxxxxxxxx> wrote: > Very small bug report: Thanks for the bug report. However, please always quote version of mdadm and version of Linux. I think this might have been fixed already, in mdadm 3.3.1. NeilBrown > mdadm assemble --force fails to assemble at the very last step after > having adjusted the event count: > > > root@storage1:/root# mdadm --assemble /dev/md106 --config > /etc/mdadm/mdadm.secondary.conf --force > mdadm: forcing event count in > /dev/mapper/mpathid-350014ee0ac5a112e-part1(3) from 1058 upto 1061 > mdadm: forcing event count in > /dev/mapper/mpathid-350014ee056feaaf4-part1(4) from 1058 upto 1061 > mdadm: forcing event count in > /dev/mapper/mpathid-350014ee001a93ede-part1(6) from 1058 upto 1061 > mdadm: clearing FAULTY flag for device 1 in /dev/md106 for > /dev/mapper/mpathid-350014ee0ac5a112e-part1 > mdadm: clearing FAULTY flag for device 5 in /dev/md106 for > /dev/mapper/mpathid-350014ee056feaaf4-part1 > mdadm: clearing FAULTY flag for device 8 in /dev/md106 for > /dev/mapper/mpathid-350014ee001a93ede-part1 > mdadm: Marking array /dev/md106 as 'clean' > mdadm: /dev/md106 assembled from 8 drives - not enough to start the array. > > mdadm is wrong here: 8 devices is indeed the total number of devices for > this array. > the last command started it inactive like this: > > md106 : inactive dm-101[0](S) dm-24[9](S) dm-107[6](S) dm-103[5](S) > dm-123[4](S) dm-95[3](S) dm-105[2](S) dm-106[1](S) > 4193255424 blocks super 1.2 > (maybe the blocks count is also wrong? Not adjusted for parity maybe? > 4193255424 / 8.0 * 6.0 == 3144941568.0 almost correct) > > it can be fixed simply by doing: > > root@storage1:/root# mdadm --stop /dev/md106 > mdadm: stopped /dev/md106 > > root@storage1:/root# mdadm --assemble /dev/md106 --config > /etc/mdadm/secondary.conf --no-degraded > mdadm: /dev/md106 has been started with 8 drives. > > now it works: > > md106 : active raid6 dm-101[0] dm-24[9] dm-107[6] dm-103[5] dm-123[4] > dm-95[3] dm-105[2] dm-106[1] > 3144938496 blocks super 1.2 level 6, 512k chunk, algorithm 2 > [8/8] [UUUUUUUU] > bitmap: 0/1 pages [0KB], 1048576KB chunk > > Regards > EW > -- > 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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