= disco verification =
ubuntu@ip-172-30-0-118:~$ sudo mdadm --create /dev/md0 --run --metadata=default
--level=0 --raid-devices=2 /dev/xvdb /dev/xvdc
mdadm: Fail create md0 when using /sys/module/md_mod/parameters/new_array
mdadm: array /dev/md0 started.
ubuntu@ip-172-30-0-118:~$ cat /proc/mdstat
Personalities : [raid0]
md0 : active raid0 xvdc[1] xvdb[0]
3141632 blocks super 1.2 512k chunks
unused devices: <none>
## kernel & mdadm upgrade
ubuntu@ip-172-30-0-118:~$ dmesg | grep raid
[ 2.419732] md: If you don't use raid, use raid=noautodetect
[ 4.990204] md/raid0:md0: cannot assemble multi-zone RAID0 with
default_layout setting
[ 4.997283] md/raid0: please set raid0.default_layout to 1 or 2
ubuntu@ip-172-30-0-118:~$ sudo mdadm --stop /dev/md0
mdadm: stopped /dev/md0
ubuntu@ip-172-30-0-118:~$ sudo mdadm --assemble -U layout-original /dev/md0
/dev/xvdb /dev/xvdc
mdadm: /dev/md0 has been started with 2 drives.
ubuntu@ip-172-30-0-118:~$ cat /proc/mdstat
Personalities : [raid0]
md0 : active raid0 xvdb[0] xvdc[1]
3141632 blocks super 1.2 512k chunks
unused devices: <none>
## reboot
ubuntu@ip-172-30-0-118:~$ dmesg | grep raid
[ 2.545479] md: If you don't use raid, use raid=noautodetect
ubuntu@ip-172-30-0-118:~$ cat /proc/mdstat
Personalities : [raid0]
md0 : active raid0 xvdb[0] xvdc[1]
3141632 blocks super 1.2 512k chunks
unused devices: <none>
ubuntu@ip-172-30-0-118:~$ sudo mdadm --stop /dev/md0
mdadm: stopped /dev/md0
ubuntu@ip-172-30-0-118:~$ sudo mdadm --create /dev/md0 --run --metadata=default
--level=0 --raid-devices=2 /dev/xvdc /dev/xvdb
mdadm: /dev/xvdc appears to be part of a raid array:
level=raid0 devices=2 ctime=Fri Dec 6 21:57:50 2019
mdadm: /dev/xvdb appears to be part of a raid array:
level=raid0 devices=2 ctime=Fri Dec 6 21:57:50 2019
mdadm: array /dev/md0 started.
ubuntu@ip-172-30-0-118:~$ sudo mdadm --detail /dev/md0 | grep Layout
Layout : original
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1850540
Title:
multi-zone raid0 corruption
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-release-notes/+bug/1850540/+subscriptions
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
