Ref: 03250413
Title: NCS/1 Backup Procedure
Date: 8/11/88

Copyright 3Com Corporation, 1991.  All rights reserved.

This is a NCS/1 Backup Procedure with sample dump of the root
file system on my Sun-2 "picacho."

It is important that the NCS be in single user mode to prevent
any server or deamon programs from altering files while they are
being backed up.

Use the following the procedure to make a full or archival backup
of an NCS/1 in standard configuration:

1. Reboot the NCS to Single User Mode.  From 'root login' type:

    #shutdown -h now      ('#' is the system prompt)
    .
    .
    .    ( messages about shutting down...)
    > bt -s( boot the machine into Single User)
    .
    .    ( messages about boot up)
    .
2. 'Dump' the root (/) file system. This will take 20 min and 1
tape:

   #/etc/dump cf /dev/rst0 /dev/rsd0a  (dump the root system)
   .
   .  ( messages from the 'dump' program about progress)
   .
   DUMP: DUMP IS DONE
   DUMP: Tape Rewinding

3. 'Dump' the /usr  file system. This will take 2 hrs. and 3
tapes:

   #/etc/dump cf /dev/rst0 /dev/rsd0g  (dump the /usr system)
   .
   .  ( messages from dump...Change tapes...this will take 2
       hrs!)
   DUMP: DUMP IS DONE
   DUMP: Tape rewinding

4. Bring the system up out of Single User to Multi user by typing
cntl-d at the prompt:

    #^d   ( this will start multi-user)
    .
    .  ( messages about startup...)
    .
    NCS/1 login:

This is the list of a successful 'dump' of the root file system on a
NCS/1.  The options 'cf' specify that the dump will be using cassette
tape and that the tape device ( file) is '/dev/rst0'. The file
system containing '/' (root) is the last parameter '/dev/rsd0a'.

The 'dump' command for the /usr file is identical except for the
name of the file system to be 'dumped', '/dev/rsd0g'.  The
command string is:

    #/etc/dump cf /dev/rst0 /dev/rsd0g

This should take about 2 hrs and require 4 cassettes for an NCS/1
using the 71 meg Micropolis 1325 drive (the standard
configuration.)

  picacho# /etc/dump cf /dev/rst0 /dev/rsd0a
  DUMP: Date of this level 0 dump: Thu Aug 11 12:32:28 1988
  DUMP: Date of last level 0 dump: the epoch
  DUMP: Dumping /dev/rsd0a (/) to /dev/rst0
  DUMP: mapping (Pass I) [regular files]
  DUMP: mapping (Pass II) [directories]
  DUMP: estimated 6039 tape blocks on 0.35 tape(s).
  DUMP: dumping (Pass III) [directories]
  DUMP: dumping (Pass IV) [regular files]
  DUMP: 26.99% done, finished in 0:14
  DUMP: 53.82% done, finished in 0:08
  DUMP: 79.65% done, finished in 0:03
  DUMP: DUMP: 6039 tape blocks on 1 tape(s)
  DUMP: DUMP IS DONE
  DUMP: Tape rewinding
  picacho#


This is the list of a successful 'dump' of the root file system
on a NCS/1.  The options 'cf' specify that the dump will be using
cassette tape and that the tape device ( file) is '/dev/rst0'.
The file system containing '/' (root) is the last parameter '/dev/
rsd0a'.

The 'dump' command for the /usr file is identical except for the
name of the file system to be 'dumped', '/dev/rsd0g'.  The
command string is:

    #/etc/dump cf /dev/rst0 /dev/rsd0g

This should take about 2 hrs and require 4 cassettes for an NCS/1
using the 71 meg Micropolis 1325 drive.
