System backup and restoration
Backup and restore for Digital Unix follows standard Unix conventions
with some minor differences related to AdvFS file systems. Commands useful
for backup include:
- tar - The standard Unix tar command.
- cpio - The standard Unix cpio command
- dump,restore - The Digital dump and restore commands are only
applicable to UFS file systems.
- rdump,rrestore - Dumps or restores UFS file systems to/from remote
- vdump,vrestore - Dumps or restores AdvFS file systems. Is purported
to allow better file system integrity on active file systems than dump
does for UFS file systems. There is no built in method for backing up
AdvFS file systems to a remote tape drive like there is with UFS systems
using rdump. To acomplish this, you need to use the kind of syntax you
would use on a "tar" or "cpio" command that is using
a remote tape drive. This involves sending the "vdump" output
to standard out, and piping that output to an "rsh" command
running "dd" on a system with a tape drive connected.
See the section regarding root disk
recovery for additional concerns regarding disaster recovery
Sybase raw disk partitions are backed up using sybase utilities accessed