Re: More ddf container woes

[NeilBrown <neilb@suse.de>]

On Wed, 23 Mar 2011 20:18:24 +0100 Albert Pauw <albert.pauw@gmail.com> wrote:

>   Hi Neil,
> 
> I noticed on your 3.1.5 announcement that there were ddf fixes as well.

Yes, they are mainly the fixes that you had helped me find and so already
knew about.

> 
> I tried the stuff I mentioned before (see below), but those issues 
> weren't fixed.
> 
> I hope you will have some time to look into this.

Hopefully, but probably not for a few weeks - I need to take a break from
mdadm and catch up with some other stuff.

I'll keep this message to refer back to when I do get back to mdadm.

Thanks for your help,

NeilBrown


> 
> Regards,
> 
> Albert Pauw
> 
> -------- Original Message --------
> 
>   Hi Neil,
> 
> I updated to the git version (devel) and tried my "old" tricks:
> 
> - Create a container with 5 disks
> - Created two raid sets (raid 1 md0 and raid 5 md1) in this container
> 
> mdadm -E  /dev/md127 shows all disks active/Online
> 
> - Failed one disk in md0
> 
> mdadm -E /dev/md127 shows this disk as active/Offline, Failed
> 
> - Failed one disk in md1
> 
> mdadm -E /dev/md127 shows this disk as active/Offline, Failed
> 
> - Added a new spare disk to the container
> 
> mdadm -E /dev/md127 shows this new disk as active/Online, Rebuilding
> 
> this looks good, but although the container has six disks, the lastly failed
> disk is missing, mdadm -E /dev/md127 only shows five disks (including
> the rebuilding one).
> 
> This time however, only one of the failed raid sets is rebuilding, so
> that fix is ok.
> 
> Here is another scenario with strange implications:
> 
> - Created a container with 6 disks
> 
> mdadm -E /dev/md127 shows all 6 disks as Global-Spare/Online
> 
> - Removed one of the disks, as I only needed 5
> 
> This time mdadm -e /dev/md127 shows six physical disks, one of which has
> no device
> 
> - Created two raid sets (raid 1 md0 and raid 5 md1) in this container
> 
> mdadm -E  /dev/md127 shows all disks active/Online, except the "empty
> entry" which stays
> Global-Spare/Online
> 
> - I fail two disks, one in each raid array
> 
> mdadm -E /dev/md127 shows these two disks as active/Offline, Failed
> 
> - I add back the disk I removed earlier, it should fit into the empty
> slot of mdadm -E
> 
> mdadm -E /dev/md127 shows something very strange, namely
> ->  All disks are set to Global-Spare/Online
> ->  All device files are removed from the slots in mdadm -E, except the
> newly added one,
> which shows the correct device
> 
> Albert
> 
> 
> 
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