Hi,

What the version of mdadm in the test? Could you please help get the output of:

mdadm -E /dev/sd[bcde]1

Thanks,
Song




On Wed, Nov 8, 2017 at 1:37 AM, Tobx [off-list ref] wrote:

Hello,

I try to get a RAID 5 array to assemble at boot with mdadm:

# mdadm --create /dev/md/test --level=5 --raid-devices=3 --write-journal=/dev/sde1 /dev/sd[bcd]1
mdadm: Defaulting to version 1.2 metadata
mdadm: array /dev/md/test started.
# /usr/share/mdadm/mkconf > /etc/mdadm/mdadm.conf
# update-initramfs -u -k all
update-initramfs: Generating /boot/initrd.img-4.9.0-4-amd64
# reboot

After the reboot:

# mdadm --detail /dev/md/test
mdadm: cannot open /dev/md/test: No such file or directory

This can easily be corrected with:

# mdadm --stop /dev/md127
mdadm: stopped /dev/md127
# mdadm --assemble --scan
mdadm: /dev/md/test has been started with 3 drives and 1 journal.

The same works as expected when leaving out the journal option "--write-journal=/dev/sde1".

The same issue occurs without a mdadm.conf file:

# rm /etc/mdadm/mdadm.conf
# update-initramfs -u -k all
update-initramfs: Generating /boot/initrd.img-4.9.0-4-amd64

It does not work with the journal option, but it works without.

Options in /etc/default/mdadm:

AUTOCHECK=true
START_DAEMON=true
DAEMON_OPTIONS="--syslog"
VERBOSE=false

Options in /etc/mdadm/mdadm.conf (if used):

HOMEHOST <system>
MAILADDR root
ARRAY /dev/md/test  metadata=1.2 UUID=4f0448f6:fee2638c:a1c1b547:20358980 name=debian:test
   spares=1

I tried this with Debian Stretch (4.9.0-4), Debian Stretch (4.13.0-0) and Ubuntu 17.10 (4.13.0-16).

I can hardly find any information about the journal option, am I missing something?

Cheers,
Tobi--
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html