How to Back Up the Root (/) File System

Use this procedure to back up the root (/) file system of a cluster node. Ensure that the cluster is running without errors before performing the backup procedure.

This procedure provides the long forms of the Sun Cluster commands. Most commands also have short forms. Except for the long and short forms of the command names, the commands are identical. For a list of the commands and their short forms, see Appendix A, Sun Cluster Object-Oriented Commands.

1. Become superuser or assume a role the provides solaris.cluster.modify RBAC authorization on the cluster node that you are backing up.

2. Switch each running data service from the node to be backed up to another node in the cluster.

   # clnode evacuate node

   node

   Specifies the node from which you are switching resource groups and device groups.

3. Shut down the node.

   # shutdown -g0 -y -i0

4. Reboot the node in noncluster mode.

   • SPARC: Type:

     ok boot -x

   • On x86 based system, perform the following commands:

     phys-schost# shutdown -g -y -i0 Press any key to continue

   1. In the GRUB menu, use the arrow keys to select the appropriate Solaris entry and type e to edit its commands.

      The GRUB menu appears similar to the following:

      GNU GRUB version 0.95 (631K lower / 2095488K upper memory) +-------------------------------------------------------------------------+ | Solaris 10 /sol_10_x86 | | Solaris failsafe | | | +-------------------------------------------------------------------------+ Use the ^ and v keys to select which entry is highlighted. Press enter to boot the selected OS, 'e' to edit the commands before booting, or 'c' for a command-line.

      For more information about GRUB based booting, see Chapter 11, GRUB Based Booting (Tasks), in System Administration Guide: Basic Administration.

   2. In the boot parameters screen, use the arrow keys to select the kernel entry and type e to edit the entry.

      The GRUB boot parameters screen appears similar to the following:

      GNU GRUB version 0.95 (615K lower / 2095552K upper memory) +----------------------------------------------------------------------+ | root (hd0,0,a) | | kernel /platform/i86pc/multiboot | | module /platform/i86pc/boot_archive | +----------------------------------------------------------------------+ Use the ^ and v keys to select which entry is highlighted. Press 'b' to boot, 'e' to edit the selected command in the boot sequence, 'c' for a command-line, 'o' to open a new line after ('O' for before) the selected line, 'd' to remove the selected line, or escape to go back to the main menu.

   3. Add -x to the command to specify that the system boot into noncluster mode.

      [ Minimal BASH-like line editing is supported. For the first word, TAB lists possible command completions. Anywhere else TAB lists the possible completions of a device/filename. ESC at any time exits. ] grub edit> kernel /platform/i86pc/multiboot -x

   4. Press the Enter key to accept the change and return to the boot parameters screen.

      The screen displays the edited command.

      GNU GRUB version 0.95 (615K lower / 2095552K upper memory) +----------------------------------------------------------------------+ | root (hd0,0,a) | | kernel /platform/i86pc/multiboot -x | | module /platform/i86pc/boot_archive | +----------------------------------------------------------------------+ Use the ^ and v keys to select which entry is highlighted. Press 'b' to boot, 'e' to edit the selected command in the boot sequence, 'c' for a command-line, 'o' to open a new line after ('O' for before) the selected line, 'd' to remove the selected line, or escape to go back to the main menu.-

   5. Type b to boot the node into noncluster mode.

      ---

      Note –

      This change to the kernel boot parameter command does not persist over the system boot. The next time you reboot the node, it will boot into cluster mode. To boot into noncluster mode instead, perform these steps to again to add the -x option to the kernel boot parameter command.

      ---

5. Back up the root (/) file system.

   • If the root disk is not encapsulated, use the following command.

     # ufsdump 0ucf dump-device /

   • If the root disk is encapsulated, use the following command.

     # ufsdump 0ucf dump-device /dev/vx/rdsk/rootvol

   Refer to the ufsdump(1M) man page for more information.

6. Reboot the node in cluster mode.

   # init 6

Example 11–3 Backing Up the Root (/) File System

In the following example, the root (/) file system is backed up onto tape device /dev/rmt/0.

# ufsdump 0ucf /dev/rmt/0 /
  DUMP: Writing 63 Kilobyte records
  DUMP: Date of this level 0 dump: Tue Apr 18 18:06:15 2000
  DUMP: Date of last level 0 dump: the epoch
  DUMP: Dumping /dev/rdsk/c0t0d0s0 (phys-schost-1:/) to /dev/rmt/0
  DUMP: Mapping (Pass I) [regular files]
  DUMP: Mapping (Pass II) [directories]
  DUMP: Estimated 859086 blocks (419.48MB).
  DUMP: Dumping (Pass III) [directories]
  DUMP: Dumping (Pass IV) [regular files]
  DUMP: 859066 blocks (419.47MB) on 1 volume at 2495 KB/sec
  DUMP: DUMP IS DONE
  DUMP: Level 0 dump on Tue Apr 18 18:06:15 2000