I use mdadm 3.1.1 with ubuntu 10.04 2.6.32-17 kernel I want to shrink a 6 drive raid 5 to a 5 drive raid 5
via: $ sudo mdadm --grow /dev/md0 --raid-devices=5 --backup-file /mdadmbackup
cmdline shows me following output:
mdadm: Need to backup 1280K of critical section.. $
and nothing happen even under cat /proc/mdstat shows me just the normal array and nothing more no drive interaction
What is happen?
Will there be a algorithm which create Raid - Sys without Write-hole like zfs? If yes when?