I am expanding my 9 harddisk RAID6 to 10 harddisk RAID6:
md1 : active raid6 sdg[0] sdi[12](S) sdt[15](S) sdy[17](S) sdx[16](S)
sdh[8] sdw[13] sdo[14] sdk[5] sdd[11] sdc[3] sdv[9] sdn[10]
27349121408 blocks super 1.2 level 6, 128k chunk, algorithm 2
[9/9] [UUUUUUUUU]
bitmap: 2/2 pages [8KB], 1048576KB chunk
It is, however, hanging the system.
# remove the bitmap
mdadm -v --grow /dev/md1 -b none
# Do the reshape
mdadm -v --grow /dev/md1 --raid-devices=10
--backup-file=/root/back-md1
mdadm: Need to backup 7168K of critical section..
cat /proc/mdstat
<<hangs>>
dmesg says:
[4328128.021614] md: reshape of RAID array md1
[4328128.021618] md: minimum _guaranteed_ speed: 10000 KB/sec/disk.
[4328128.021621] md: using maximum available idle IO bandwidth (but
not more than 30000 KB/sec) for reshape.
[4328128.021783] md: using 128k window, over a total of 3907017344k.
[4328128.312637] md: md_do_sync() got signal ... exiting
Disk I/O is blocked to the RAID.
What to do?
/Ole
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