Converting the root File System to AdvFS

Conversion allows moving the UFS root file system on one disk to the equivalent AdvFS root file system on a different target disk.

Needs:

• A second bootable disk (you must use partition a or c)

Setup:

• Existing UFS configuration
  File system: root
  Mount directory: /
  Disk partition: /dev/rz1a
• New AdvFS configuration
  File system: root
  Mount directory: /newroot
  Disk partition: /dev/rz2a
  File domain: root_domain
  Fileset: root

Convertion procedure:

• Login as root on the system containing the root file system
• Create a file domain and fileset
  # mkfdmn -r -t rz26 /dev/rz2a root_domain
# mkfset root_domain root

• Create a mount-point directory and mount the new fileset on the directory
  # mkdir /newroot
# mount -t advfs root_domain#root /newroot

• Restore the UFS root file system to the root fileset
  # vdump 0f - / | (cd /newroot; vrestore -xf -)

• Make the disk with the root domain a bootable disk
  # disklabel -r /dev/rrz2a > /tmp/rz2label
# disklabel -t advfs -r -R /dev/rrz2a /tmp/rz2label rz26

• Edit /etc/fstab on the AdvFS root fileset to indicate the new root entry and perform the following actions:

  $\rhd$ search /newroot/etc/fstab for the previous UFS root mount:
  /dev/rz1a / ufs rw 1 1

  $\rhd$ comment out this entry with the pound sign (#)

  $\rhd$ add the following line:
  root_domain#root / advfs rw 1 1

• Shutdown the system and reset the boot default device, BOOTDEF_DEV to point to the disk with the new root domain.
• Reboot the system to enable the AdvFS root file system.

The converted root file system is ready to use.
N.B. The AdvFS root domain is limited to one disk. Do not use addvol to extend the root domain.