> hi neil: > I get your the latest patches (v2.6.29-rc5-335-g0ac4ee7) from git://neil.brown.name/md. > I want to test the function that switch raid from raid5 to raid6. > But find some problem. > I create a raid6 which has 4 disks,and write some files to this raid6 ,next,i remove two of them. > if this raid6 is ok,now i can read the files that i have written correctly. > but in fact that i can't read the files ok.maybe there is some error about raid6 in v2.6.29-rc5-335-g0ac4ee7. > > > Steps i have done are as follows > 1, mdadm -C /dev/md6 -l 6 -n 4 /dev/sda /dev/sdb /dev/sdc /dev/sdd --metadata=1.0 --size=1000000 -f > 2, pvcreate /dev/md6 > 3, vgcreate md6vg /dev/md6 > 4, lvcreate -L 200M -n md6lv md6vg > 5, mkfs.xfs /dev/mapper/md6vg-md6lv > 6, mount /dev/mapper/md6vg-md6lv /tmp (is ok) > > 7, mdadm -f /dev/md6 /dev/sda /dev/sdb (faulty two disks) > 8, mount /dev/mapper/md6vg-md6lv /tmp (now can't read the filesystem information correctly) > (mount: Structure needs cleaning) (print this ) > > thanks neil ,right here waiting for your help ! Thanks for reporting this. There must be something broken in the changes to raid6 to support hardware-offload of the calculations. If you try my 'md-scratch' branch it might work better. It has all the code for raid level conversion, but none of the raid6 rework. NeilBrown -- 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
