[Bug 1085032] Re: Network is shut down before iscsi volumes are unmounted/shutdown

[markdv]

using _netdev is only partial solution. It might unmount the filesystem,
but the iscsi session still can't logout properly...

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https://bugs.launchpad.net/bugs/1085032

Title:
  Network is shut down before iscsi volumes are unmounted/shutdown

Status in “open-iscsi” package in Ubuntu:
  Invalid

Bug description:
  I have a server with Ubuntu 12.04 LTS running on it and a SAN attached to it via iSCSI + multipath. When shutting down/rebooting the system the network is shut down before the iSCSI volumes are unmounted and iscsi is shut down. Thus the volume can't be flushed and i run into potential data-loss.
  So at least those filesystems imported via the network need to be unmounted before the network is shut down.

   * Stopping atop system monitor: atop.
   * Stopping multipath daemon multipathd                                  [ OK ]
   * Stopping Name Service Cache Daemon nscd                               [ OK ]
   * Stopping LDAP connection daemon nslcd                                 [ OK ]
   * Stopping SASL Authentication Daemon saslauthd                         [ OK ]
   * Stopping MD monitoring service mdadm --monitor                        [ OK ]
   * Stopping NFS kernel daemon                                            [ OK ]
   * Unexporting directories for NFS kernel daemon...                      [ OK ]
   * Stopping OpenLDAP slapd                                               [ OK ]
   * Asking all remaining processes to terminate...                        [ OK ]
   * All processes ended within 1 seconds....                              [ OK ]
  rpcbind: rpcbind terminating on signal. Restart with "rpcbind -w"
   * Deconfiguring network interfaces...                                   [ OK ]
   * Deactivating swap...                                                  [ OK ]
   * Unmounting local filesystems...
  [   35.296645] end_request: I/O error, dev dm-1, sector 10238558242
  [   35.297043] Buffer I/O error on device dm-2, logical block 1279819776
  [   35.297484] JBD2: I/O error detected when updating journal superblock for dm2-8.
  [   35.297988] end_request: I/O error, dev dm-1, sector 10238558242
  [   35.298380] Buffer I/O error on device dm-2, logical block 1279819776
  [   35.298802] JBD2: I/O error detected when updating journal superblock for dm2-8.
  [   35.299285] end_request: I/O error, dev dm-1, sector 10238558242
  [   35.299680] Buffer I/O error on device dm-2, logical block 1279819776
  [   35.308467] JBD2: I/O error detected when updating journal superblock for dm2-8.
  [   35.329612] end_request: I/O error, dev dm-1, sector 34
  [   35.339448] Buffer I/O error on device dm-2, logical block 0
                                                                           [ OK ]
   * Disconnecting iSCSI targets                                           [ OK ]
   * Stopping iSCSI initiator service                                      [ OK ]
   * Will now restart

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