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[linux-lvm] Strange LVM Error With AoE Disks



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?

-- 
Jayson Vantuyl
Systems Architect



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