Re: Version 3.2.5 and ddf issues (bugreport)

[NeilBrown <neilb@suse.de>]

[-- Attachment #1: Type: text/plain, Size: 1771 bytes --]

On Sat, 28 Jul 2012 13:46:06 +0200 Albert Pauw <albert.pauw@gmail.com> 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


[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 828 bytes --]