Dump and Restore Requirements

Dump and Restore Requirements

The filesystem conversion procedures in the sections "Converting Filesystems on the System Disk From EFS to XFS" and "Converting a Filesystem on an Option Disk From EFS to XFS" in this chapter require that you dump the filesystems you plan to convert to tape or to another disk with sufficient free disk space to contain the dump image. Dumping to disk is substantially faster than dumping to tape.

When you convert a system disk, you must use the dump and restore commands. When you convert a filesystem on an option disk, you can use any backup and restore commands.

If you dump to a tape drive, follow these guidelines:

Have sufficient tapes available for dumping the filesystems to be converted.
If you are converting filesystems on a system disk, the tape drive must be local.
If you are converting filesystems on option disks, the tape drive can be local or remote.

The requirements for dumping to a different filesystem are:

The filesystem being converted must have 2 GB or less in use (the maximum size of the dump image file on an EFS filesystem) unless it is being dumped to an XFS filesystem.
The filesystem that will contain the dump must have sufficient disk space available to hold the filesystems to be converted.
If you are converting filesystems on a system disk, the filesystem where you place the dump must be local to the system.
If you are converting filesystems on option disks, the filesystem you dump to can be local or remote.