dump/restore

[Guy Harris]

>Dump/restore is very quick, and it backs up everything, but I have
>a few questions:   It seems to dump the entire filesystem, including
>the superblock/inode dumps.  It also seems to me that it dumps
>disk blocks in order of the disk itself, rather than the order of the
>file.  This means that restoring a filesystem will *not* reduce
>the fragmentation.

False.  It does not dump disk blocks in the order of the disk, and it
definitely doesn't *restore* disk blocks in the order of the disk
itself.  Dumping/restoring a file system will reduce fragmentation,
especially on systems such as V7, S3, or 4.1BSD that have the V7 file system
and also have dump/restor (not "restore").  Unfortunately, S5 has the V7
file system, but generally doesn't have dump/restor....

>Does it also require the exact same filesystem to by restored on?
>If this is so, then I can't use dump/retore to expand a full filesystem.

No, it doesn't; one of the common uses of dump/restor(e) is to expand
full file systems.