On 07/18/2010 08:03 PM, Bill Davidsen wrote: > 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. > Yeah, I thought of exactly the same thing after posting this message. -- 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
