On Sat, 28 Jul 2012 13:46:06 +0200 Albert Pauw <albert.pauw@xxxxxxxxx> wrote: > Hi Neil, > > After a hiatus of 1.5 year (busy with all sorts) I am back and tried the > ddf code to see how things improved. Thanks! > > I build a VM Centos 6.3 system with 6 extra 1GB disks for testing. > I found several issues in the standard installed 3.2.3 version of mdadm > relating to ddf, but installed the > 3.2.5 version in order to work with recent code. > > However, while version 3.2.3 is able to create a ddf container with > raidsets in it, I found a problem with the 3.2.5 version. > > After initially creating the container: > > mdadm -C /dev/md127 -e ddf -l container /dev/sd[b-g] > > which worked, I created a raid (1 or 5 it doesn't matter in this case) > in it: > > mdadm -C /dev/md0 -l raid5 -n 3 /dev/md127 > > However, it stays on resync=PENDING and readonly, and doesn't get build. > > So I tried to set it to readwrite: > > mdadm --readwrite /dev/md0 > > Unfortunately, it stays on readonly and doesn't get build. > > As said before, this did work in 3.2.3. > > Are you already on this problem? It sounds like a problem with 'mdmon'. mdmon needs to be running before the array can become read-write. mdadm should start mdmon automatically but maybe it isn't. Maybe it cannot find mdmon? could you check if mdadm is running? If it isn't run mdmon /dev/md127 & and see if it starts working. > > Kind regards, > > Albert > > P.S. My idea was, because the ddf code is not that much used, to create > a test/validate script for ddf. > There is one 'ddf' test in my test suite and I think it is working. I'm happy to add more tests if you suggest or write some. NeilBrown
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