Konstantin Svist wrote: > I've been playing around with RAID config and may have finally messed > it up. > > Initially, I created the array with 3 300G drives: > # mdadm --create --verbose /dev/md0 --level=5 --raid-devices=3 /dev/sda4 > /dev/sdb1 /dev/sdc1 > # mkfs.ext4 -v -m 0.01 -E stride=16,stripe-width=32 /dev/md0 > > It's been working nicely so far, and I decided to add a 4th 300G drive: > # mdadm --grow --raid-devices=4 --backup-file=/root/grow_md0.bak /dev/md0 > > That finished overnight, while I looked around and found that chunk size > of 512 should work better. I unmounted the FS and ran > # mdadm --grow -c 512 --backup-file=/root/grow_md0_rechunk.bak /dev/md0 > mdadm: component size 293033536K is not a multiple of chunksize 512K > > so I sized it down a bit: > # mdadm --grow -z 293033472 --backup-file=/root/grow_md0_size.bak /dev/md0 > > and then back to resizing chunks: > mdadm --grow -c 512 --backup-file=/root/grow_md0_rechunk.bak /dev/md0 > > It's running right now: > # cat /proc/mdstat > Personalities : [raid6] [raid5] [raid4] > md0 : active raid5 sdd1[3] sda4[0] sdc1[2] sdb1[1] > 293033472 blocks super 0.91 level 5, 64k chunk, algorithm 2 [4/4] > [UUUU] > [====>................] reshape = 22.7% (66540032/293033472) > finish=947.3min speed=3984K/sec > > > But just now I tried to mount the filesystem and it's failing: > EXT4-fs (md0): bad geometry: block count 146516768 exceeds size of > device (73258368 blocks) > > Here's the question, then: am I royally screwed or is my data still > there? How do I recover? May I suggest trying this on the linux-raid list? Not that's it's off-topic here, just that people there may have faster/better answers. -- Bill Davidsen <davidsen@xxxxxxx> "We have more to fear from the bungling of the incompetent than from the machinations of the wicked." - from Slashdot -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
