User`s guide

BACKUP
The following example command displays on your terminal a directory of the
logical disk MYBACK.DSK on DU0:
.BACKUP/DIRECTORY DU0:MYBACK.DSK/SUBSET
RT-11 BACKUP
04-Jan-91 10:50
Subset: DU0:MYBACK.DSK
File Blocks Date
PROG1 .OBJ 15 Friday 14-Dec-90
PROG2 .OBJ 234 Friday 14-Dec-90
PROG3 .OBJ 49 Monday 03-Dec-90
MEMO1 .TXT 10 Wednesday 02-Jan-91
MEMO2 .TXT 2 Thursday 03-Jan-91
5 Files, 310 Blocks
3. Extracting one or more files from a logical disk
You can extract one or more selected files from mounted or unmounted logical
disks by using the following general command syntax:
BACKUP/RESTORE in-dev:ldname.dsk/SUBSET,file1[,file2,...] out-dev:
where:
in-dev: specifies the volume containing the logical disk.
ldname.dsk specifies the name of the logical disk.
file(n) specifies the file or files you want to restore from the logical disk.
You can use wildcards.
out-dev specifies the volume to which you want the file(s) restored.
The following command extracts the files REPORT.* in logical disk WRK.DSK
on SY, to device DK:
.BACKUP/RESTORE SY:WRK.DSK/SUBSET,REPORT.* DK:
See the /RESTORE option for more information on restoring logical disks.
/SYSTEM
(Used only with /RESTORE) Allows you to restore SYS files when using
wildcards. This is to prevent you from accidentally losing or corrupting SYS
files.
/VERIFY[:ONLY]
Verifies that output data matches input data in a BACKUP/RESTORE operation.
Although verification slows down the operation, it is usually worth the time spent
in terms of higher data integrity and confidence in your BACKUP operations.
Three Verification Procedures
Depending on how you specify it, the /VERIFY option performs one of three
different verification procedures:
• /VERIFY verifies a data transfer as you are backing up the data.
RT–11 Command Descriptions 25