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Re: [dm-devel] kpartx fails 4k block partition *changed**



Greetings,

I apologize I've riposted a updated pastebin. The dm seemed to have become confused with multiple luns being attached and detached before this post. A soft reboot of the system re-mapped and produced much different results. Now upon start up the 4k devices are not listed under lsblk as DM but only as their raw paths. Multipath has created the device without partition. I can manually execute kpartx and the dm parts are added. So now I'm not sure if this is a multipath problem or udev rules.

http://pastebin.com/Nnd4Ym4W

Thanks
Ross


On 3/13/2014 6:01 AM, Bryn M. Reeves wrote:
On 03/12/2014 10:20 PM, Ross Anderson wrote:
Under 0.50 multipath tools release, partitions are not being created for
devices that are 4k Native.  This is under kernel 3.13.6, udev-208.

http://pastebin.com/Nnd4Ym4W
The devices below don't appear in your lsblk output so it's hard to say
whether the partitions kpartx prints for the devices are valid or not:

     ##kpartx sfx4k
     sfx4k1 : 0 2056 sfx4k 2048
     sfx4k2 : 0 165068760 sfx4k 8192
     ##kpartx samplelib
     samplelib1 : 0 2056 samplelib 2048
     samplelib2 : 0 1171863512 samplelib 8192
That said the tables above look perfectly plausible. It would help to
verify that if you could post the partition tables the devices contain
(preferably in sector units).

kpartx -a 2 /dev/dm-2
failed to stat() 2
What's that '2' doing there? The only thing kpartx expects following the
'-a' is the whole disk device:

     SYNOPSIS
        kpartx [-a | -d | -l] [-v] wholedisk

What happens when you run 'kpartx -a /dev/mapper/sfx4k? (or samplelib).

Regards,
Bryn.

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