Feb  7 16:07:28 ubuntu-oneiric kernel: [  111.796176]  nbd15: unknown partition table
Feb  7 16:07:29 ubuntu-oneiric kernel: [  113.116148] nbd15: NBD_DISCONNECT
Feb  7 16:07:29 ubuntu-oneiric kernel: [  113.125780] nbd15: Receive control failed (result -32)
Feb  7 16:07:29 ubuntu-oneiric kernel: [  113.125780] nbd15: queue cleared
Feb  7 16:07:29 ubuntu-oneiric kernel: [  113.364252]  nbd15: unknown partition table
Feb  7 16:07:30 ubuntu-oneiric kernel: [  114.707306] EXT3-fs (nbd15): error: can't find ext3 filesystem on dev nbd15.
Feb  7 16:07:30 ubuntu-oneiric kernel: [  114.712128] EXT2-fs (nbd15): error: can't find an ext2 filesystem on dev nbd15.
Feb  7 16:07:30 ubuntu-oneiric kernel: [  114.714545] EXT4-fs (nbd15): VFS: Can't find ext4 filesystem
Feb  7 16:07:31 ubuntu-oneiric kernel: [  114.886021] nbd15: NBD_DISCONNECT
Feb  7 16:07:31 ubuntu-oneiric kernel: [  114.893177] nbd15: Receive control failed (result -32)
Feb  7 16:07:31 ubuntu-oneiric kernel: [  114.904341] nbd15: queue cleared
Feb  7 16:18:45 ubuntu-oneiric kernel: [  789.601014] nbd15: Attempted send on closed socket