Installation guide

maximum logical volumes, maximum physical volumes, and
maximum physical extents in a volume group, which requires
approximately 4 MB of additional disk space.
5.2.1 Migration Summary
The following steps summarize the procedure for migrating shadowed data
from an ULTRIX system to a DIGITAL UNIX system:
1. Dump the ULTRIX shadowed file system to tape. (This is the only step
performed on an ULTRIX system.)
2. Label the disks that you intend to use for disk mirroring. If you plan to
migrate the shadowed disks, install the disks on the DIGITAL UNIX
system before labeling.
3. Create and extend a nonmirrored logical volume.
4. Mirror the logical volume.
5. Create a DIGITAL UNIX file system on the mirrored logical device.
6. Mount the DIGITAL UNIX file system and restore the ULTRIX file
system from tape.
Repeat this procedure for each ULTRIX shadowed file system.
5.2.2 Migration Example
The following example demonstrates how to migrate an ULTRIX shadowed
file system to corresponding partitions on a DIGITAL UNIX system. The
resulting migration automatically mirrors data on the DIGITAL UNIX
system in the same manner that data was shadowed on the ULTRIX
system. The elements of this example include:
ULTRIX Disk Shadowing example elements before migration:
File system: /fs
Shadow device: /dev/shd14g
Disk partitions: /dev/rz1g and /dev/rz2g
Shadow set: two-member
Disk type: rz56
LVM example elements after migration:
File system: /fs
Logical volume: logvolmir
Volume group: /dev/vg01
Physical volumes: /dev/rz1g and /dev/rz2g
5–4 Migrating Your ULTRIX System and Network Environment