Hi,
On 22/08/15 10:07, Lars Ellenberg wrote:
Did you try the same with a variation of:
create: "echo MAGIC STRING | dd oflag=direct conv=sync bs=4k count=1"
verify: "dd iflag=direct bs=4k count=1 | xxd -a"
I have now done this, and I still see the same failure rate of ~1:1000.
I actually used:
echo "TESTDATAMAGIC" | dd oflag=direct conv=sync status=none bs=4k
count=1 of=/dev/drbd2
and
ssh ${remhost} "dd status=none iflag=direct bs=4k count=1 if=/dev/drbd2
| xxd -a | grep -F 'TESTDATAMAGIC' >/dev/null"
Also, lvm.conf "preferred names" is not good enough.
You need to actually deny use of the lower level devices.
The lower level device is filtered out ( with filter = [
"r|^/dev/guests/mwsig-|" ] ).
I will now try and get more detailed output as you suggest; I wanted to
check that I still saw errors with dd'ing a particular string rather
than pvcreate before re-writing my test code to log more details.
Regards,
Matthew
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