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Re: [linux-lvm] Strange LVM Error With AoE Disks



Jayson Vantuyl wrote:
> Hello,
> 
> We have been using Coraid's ATA-Over-Ethernet shelves for a while with
> much success.
> 
> Recently, we added a second shelf (numbered 1) to our first shelf
> (numbered 0).  CLVM has been running on the old shelf perfectly fine.
> 
> As soon as I added the second shelf, attempting to lvcreate a new lv
> utilizing the new disks generated roughly the following errors:
> 
>   Error locking on node ey00-02: Internal lvm error, check syslog
>   Error locking on node ey00-05: Internal lvm error, check syslog
>   Error locking on node ey00-01: Internal lvm error, check syslog
>   Error locking on node ey00-00: Internal lvm error, check syslog
>   Error locking on node ey00-04: Internal lvm error, check syslog
>   Error locking on node ey00-03: Internal lvm error, check syslog
>   Failed to activate new LV.
> 
> All of the nodes show the following errors in syslog:
> 
> Feb  7 06:09:36 ey00-00 lvm[4869]: Couldn't find all physical volumes
> for volume group ey00-data.
> Feb  7 06:09:37 ey00-00 lvm[4869]: Couldn't find device with uuid
> '0Cot9Z-BHjK-2Nkw-eEdy-fbFF-Wh1q-qhRaut'.
> Feb  7 06:09:37 ey00-00 lvm[4869]: Couldn't find all physical volumes
> for volume group ey00-data.
> Feb  7 06:09:37 ey00-00 lvm[4869]: Couldn't find device with uuid
> '0Cot9Z-BHjK-2Nkw-eEdy-fbFF-Wh1q-qhRaut'.
> Feb  7 06:09:37 ey00-00 lvm[4869]: Couldn't find all physical volumes
> for volume group ey00-data.
> Feb  7 06:09:37 ey00-00 lvm[4869]: Couldn't find device with uuid
> '0Cot9Z-BHjK-2Nkw-eEdy-fbFF-Wh1q-qhRaut'.
> Feb  7 06:09:37 ey00-00 lvm[4869]: Couldn't find all physical volumes
> for volume group ey00-data.
> Feb  7 06:09:37 ey00-00 lvm[4869]: Couldn't find device with uuid
> '0Cot9Z-BHjK-2Nkw-eEdy-fbFF-Wh1q-qhRaut'.
> Feb  7 06:09:37 ey00-00 lvm[4869]: Couldn't find all physical volumes
> for volume group ey00-data.
> Feb  7 06:09:37 ey00-00 lvm[4869]: Volume group for uuid not found:
> WWbD8SXOsAJzDYRCFQiciQho84Rl99nVF7QbO0ArRxnH4cZeKgzG0Nx4gbEhgALU
> 
> Inspecting the lvm.conf shows that these devices are the new ones that
> were added.
> 
> Even more bizarre, pvscan finds them just fine on all nodes.
> 
> The only thing I can note about these devices that is particularly
> different is that they appear to be using minor numbers above 256.  Note
> this ls output:
> 
> brw-rw---- 1 root disk 152, 288 Feb  7 04:43 /dev/etherd/e1.2
> brw-rw---- 1 root disk 152, 289 Feb  7 06:10 /dev/etherd/e1.2p1
> brw-rw---- 1 root disk 152, 304 Feb  7 04:44 /dev/etherd/e1.3
> brw-rw---- 1 root disk 152, 305 Feb  7 06:10 /dev/etherd/e1.3p1
> 
> Is there a known problem with LVM or CLVM related to large device minor
> numbers?


Did you restart clvmd after adding the new disks? There is a bug where it
doesn't always recognise new hardware.

-- 

patrick


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