RESTOR(VIII) 11/24/73 RESTOR(VIII)
NAME
restor - incremental file system restore
SYNOPSIS
restor key [ arguments ]
DESCRIPTION
Restor is used to read magtapes dumped with the dump
command. The key argument specifies what is to be done.
Key is a character from the set trxw.
t The date that the tape was made and the date that was
specified in the dump command are printed. A list of
all of the i-numbers on the tape is also given.
r The tape is read and loaded into the file system
specified in arguments. This should not be done
lightly (see below).
x Each file on the tape is individually extracted into a
file whose name is the file's i-number. If there are
arguments, they are interpreted as i-numbers and only
they are extracted.
f Read the dump from the next argument file instead of
the tape.
i All read and checksum errors are reported, but will
not cause termination.
w In conjunction with the x option, before each file is
extracted, its i-number is typed out. To extract this
file, you must respond with y.
The r option should only be used to restore a complete dump
tape onto a clear file system or to restore an incremental
dump tape onto this. Thus
/etc/mkfs /dev/rp0 40600
restor r /dev/rp0
is a typical sequence to restore a complete dump. Another
restor can be done to get an incremental dump in on top of
this.
A dump followed by a mkfs and a restor is used to change the
size of a file system.
FILES
/dev/mt0
SEE ALSO
ls (I), dump (VIII), mkfs (VIII), check (VIII), clri (VIII)
DIAGNOSTICS
There are various diagnostics involved with reading the tape
and writing the disk. There are also diagnostics if the i-
list or the free list of the file system is not large enough
to hold the dump.
BUGS
There is redundant information on the tape that could be
used in case of tape reading problems. Unfortunately,
restor's approach is to exit if anything is wrong.
Files that have been deleted are not removed when
incremental tapes are loaded. It will be necessary to check
the restored file system and clri any files that show up
with a 201 delta diagnostic.
The current version of restor does not free space occupied
by files that are overwritten. Thus a check will have to be
performed to reclain the missing space.