You deploy a VMware vSphere Data Protection (VDP) appliance on a server that is running Windows Storage Server 2008 R2 or Windows Storage Server 2012. When the deployment accesses the Network File System (NFS) shares on the server, the deployment fails, and you receive the following error message:
Additionally, messages that resemble the following are logged to the "/var/log/vmkernel.log" file during the failure:
Error writing to disk.
# tail –f /var/log/vmkernel.log
2013-03-15T09:30:03.820Z cpu2:9466)BC: 3115: Blocking due to no free buffers. nDirty = 995 nWaiters = 1
2013-03-15T09:30:03.940Z cpu2:9466)BC: 3115: Blocking due to no free buffers. nDirty = 988 nWaiters = 1
2013-03-15T09:30:04.110Z cpu2:9466)BC: 3115: Blocking due to no free buffers. nDirty = 988 nWaiters = 1
2013-03-15T09:30:04.220Z cpu2:9466)BC: 3115: Blocking due to no free buffers. nDirty = 982 nWaiters = 1
2013-03-15T09:30:04.400Z cpu2:9466)BC: 3115: Blocking due to no free buffers. nDirty = 988 nWaiters = 1
2013-03-15T09:30:04.520Z cpu2:9466)BC: 3115: Blocking due to no free buffers. nDirty = 920 nWaiters = 1
2013-03-15T09:31:34.300Z cpu22:9466)BC: 3115: Blocking due to no free buffers. n Dirty = 905 nWaiters = 1
2013-03-15T09:33:07.710Z cpu18:9466)BC: 3115: Blocking due to no free buffers. nDirty = 975 nWaiters = 1
2013-03-15T09:34:45.030Z cpu8:9466)BC: 3115: Blocking due to no free buffers. nDirty = 970 nWaiters = 1
2013-03-15T09:35:17.139Z cpu22:10713)WARNING: UserLinux: 1331: unsupported: (void)
2013-03-15T09:36:16.959Z cpu4:9466)BC: 3115: Blocking due to no free buffers. nDirty = 961 nWaiters = 1
2013-03-15T09:38:30.167Z cpu2:9466)BC: 3115: Blocking due to no free buffers. nDirty = 977 nWaitrs = 1
2013-03-15T09:40:18.908Z cpu0:9466)BC: 3115: Blocking due to no free buffers. nDirty = 977 nWaitrs = 1
2013-03-15T09:42:04.068Z cpu0:8221)NFSLock: 610: Stop accessing fd 0x41000ad83078 3
2013-03-15T09:42:11.082Z cpu2:8194)StorageApdHandler: 248: APD Timer started for ident [e22d08a3-f45c4254]
2013-03-15T09:42:11.082Z cpu2:8194)StorageApdHandler: 395: Device or filesystem with identifier [e22d08a3-f45c4254] has entered the All Paths Down state.
2013-03-15T09:42:11.082Z cpu2:8194)StorageApdHandler: 846: APD Start for ident [e22d08a3-f45c4254]!
2013-03-15T09:43:03.972Z cpu2:8194)NFSLock: 570: Start accessing fd 0x41000ad83078 again
Note After the failure occurs and the vSphere client is updated, the NFS data store comes back online.2013-03-15T09:30:03.820Z cpu2:9466)BC: 3115: Blocking due to no free buffers. nDirty = 995 nWaiters = 1
2013-03-15T09:30:03.940Z cpu2:9466)BC: 3115: Blocking due to no free buffers. nDirty = 988 nWaiters = 1
2013-03-15T09:30:04.110Z cpu2:9466)BC: 3115: Blocking due to no free buffers. nDirty = 988 nWaiters = 1
2013-03-15T09:30:04.220Z cpu2:9466)BC: 3115: Blocking due to no free buffers. nDirty = 982 nWaiters = 1
2013-03-15T09:30:04.400Z cpu2:9466)BC: 3115: Blocking due to no free buffers. nDirty = 988 nWaiters = 1
2013-03-15T09:30:04.520Z cpu2:9466)BC: 3115: Blocking due to no free buffers. nDirty = 920 nWaiters = 1
2013-03-15T09:31:34.300Z cpu22:9466)BC: 3115: Blocking due to no free buffers. n Dirty = 905 nWaiters = 1
2013-03-15T09:33:07.710Z cpu18:9466)BC: 3115: Blocking due to no free buffers. nDirty = 975 nWaiters = 1
2013-03-15T09:34:45.030Z cpu8:9466)BC: 3115: Blocking due to no free buffers. nDirty = 970 nWaiters = 1
2013-03-15T09:35:17.139Z cpu22:10713)WARNING: UserLinux: 1331: unsupported: (void)
2013-03-15T09:36:16.959Z cpu4:9466)BC: 3115: Blocking due to no free buffers. nDirty = 961 nWaiters = 1
2013-03-15T09:38:30.167Z cpu2:9466)BC: 3115: Blocking due to no free buffers. nDirty = 977 nWaitrs = 1
2013-03-15T09:40:18.908Z cpu0:9466)BC: 3115: Blocking due to no free buffers. nDirty = 977 nWaitrs = 1
2013-03-15T09:42:04.068Z cpu0:8221)NFSLock: 610: Stop accessing fd 0x41000ad83078 3
2013-03-15T09:42:11.082Z cpu2:8194)StorageApdHandler: 248: APD Timer started for ident [e22d08a3-f45c4254]
2013-03-15T09:42:11.082Z cpu2:8194)StorageApdHandler: 395: Device or filesystem with identifier [e22d08a3-f45c4254] has entered the All Paths Down state.
2013-03-15T09:42:11.082Z cpu2:8194)StorageApdHandler: 846: APD Start for ident [e22d08a3-f45c4254]!
2013-03-15T09:43:03.972Z cpu2:8194)NFSLock: 570: Start accessing fd 0x41000ad83078 again