User`s guide

BACKUP
• Restoring a logical-disk file from a saveset containing several logical-disk
files
See the preceding description of restoring individual files from savesets,
contained in the description of the /RESTORE option.
4. Restoring/extracting individual files from logical disks
The phrase restoring individual files from a logical disk can apply to either
of the following two operations:
• Restoring files from a device-image saveset of a logical disk
• Extracting one or more files from a logical disk
The first operation is a saveset one, while the second is a subset one. For a
description of the first operation, see the preceding description of restoring
individual files from savesets, contained in the description of the /RESTORE
option.
For a description of the second operation, see the description of the /SUBSET
option.
The following command extracts the file MEMO1.TXT from the logical disk
FRIDAY.DSK on DL1 and places that file on device DL0:
.BACKUP/RESTORE/VERIFY DL1:FRIDAY.DSK/SUBSET,MEMO1.TXT DL0:
/[NO]REWIND
Rewinds a magtape before performing the next operation. This is the default.
The /NOREWIND option inhibits the rewinding of the magtape before appending
the next saveset to that magtape. This increases the speed of BACKUP
operations but also omits saveset name verification (the magtape must rewind
to check for unique saveset names).
If you intend to create a number of savesets on a magtape, you may want to
use the /NOREWIND option. However, since BUP cannot then check that the
saveset name you use is unique, Digital recommends that you always explicitly
assign unique saveset names.
/NOREWIND also inhibits initial tape rewind when performing /DIRECTORY
and /RESTORE operations.
Note: If a fetch or load causes a magtape handler to be read into memory, then
an automatic REWIND operation will be performed. So you must explicitly load
a magtape handler before using the /NOREWIND option.
/SAVESET
Used in combination with either the /RESTORE or /DIRECTORY options. The
/SAVESET option, specified with the first input specification, indicates the
saveset containing a file(s) you want to restore or the saveset from which you
want to obtain directories.
/SAVESET can only be used as a qualifier on the first input file.
22 RT–11 Command Descriptions