root@netdev.Comsys.COM (Alex Huppenthal) (03/14/90)
SCO Xenix 2.3.2 GT, doesn't support adding to an existing tar tape.
These scripts do.
I've tested these tonight, for a few minutes. They appear to
do the expected.
If you are aware of a more elegant solution, I'd like to hear from
you. In the mean time, if you've been battling the same problem,
these scripts allow you to make use of all the tape on a 150MB
backup, not just the initial tape write.
Change the /etc/default/tape and tar entries, and execute these short
scripts, where appropriate, and you may end up as happy as I am.
Enjoy.
If you add to these, or find make additions, like range checks, error checks,
logfiles, etc, I'd love to receive the updates.
-Alex
Standard disclaimer: We take no responsibility for these, of any kind.
Note: This shar archive will unpack into the current directory.
# This is a shell archive. Remove anything before this line,
# then unpack it by saving it in a file and typing "sh file".
#
# Wrapped by root on Wed Mar 14 01:02:25 CST 1990
# Contents: add all check ctape goto tape tar
echo x - add
sed 's/^@//' > "add" <<'@//E*O*F add//'
# Archive Tape Fix for SCO Xenix 2.3.2GT
#
# AHA1540A + Archive 2150s tape backup system
# workaround to allow tar additions to tape archives.
#
# March 12, 1990 alex@comsys.com
#
# This script adds files to the end of a tape.
# For the Archive 2150s tape unit, the parameters
# are 150000 1 kilobyte blocks, 20 is the blocking factor
#
# The non-rewinding device /dev/nrct0 is specified in the tar line.
# If you'd like to rewind the tape after tar completes,
# change the tar command in this script to point to /dev/rct0
#
# Tar reports 'Seek= 00 K ' - what does it know, really?
#
# Disclaimer: Good luck. If it breaks, oh well, go back to
# using 10MB of each $25 tape, as I did before.
#
# If you find this useful, post something of value, or make a
# donation to a charitable organization.
#
#
#
echo 'Add, Version 0'
count=0
while true
do
tape rfm /dev/nrct0 2>/dev/null || break
count=`expr $count + 1 `
echo "past fileset $count "
done
tar cvfbk /dev/nrct0 20 150000 $*
echo 'Files added to /dev/nrct0 '
echo 'Tape positioned for next write'
@//E*O*F add//
chmod u=rwx,g=rx,o=rx add
echo x - all
sed 's/^@//' > "all" <<'@//E*O*F all//'
# all
# This script prints a verbose tar listing of
# on the tape, first printing the Tape archive
# number.
#
# I use it for listing the contents of tar tapes
# to build a tar library index. - alex@comsys.com
#
#
#
echo "all: Tar tape listing - `date`"
count=1
tape rewind
while true
do
echo
echo "Tar dataset number $count"
tar tvf /dev/nrct0 2>/dev/null || break
count=`expr $count + 1`
done
echo "/dev/nrct0"
tape rfm /dev/nrct0 2>/dev/null
echo "tape at end of archives"
@//E*O*F all//
chmod u=rwx,g=rx,o=rx all
echo x - check
sed 's/^@//' > "check" <<'@//E*O*F check//'
# check
# prints a verbose listing of the archive, and leaves
# the tape at the next archive position.
tar tvf /dev/nrct0
@//E*O*F check//
chmod u=rwx,g=rx,o=rx check
echo x - ctape
sed 's/^@//' > "ctape" <<'@//E*O*F ctape//'
# ctape
# This script prints the number of tape data sets
# on the entire tape backup, starting at the current
# position to the end.
#
# If you'd like a count of the entire tape, issue
#
# tape rewind
#
# then run this script, or add it to this script.
#
# alex@comsys.com
#
#
echo 'ctape: Counting file sets from current tape position'
count=0
while true
do
tape rfm /dev/nrct0 2> /dev/null || break
count=`expr $count + 1`
echo "Found $count"
done
echo "/dev/nrct0"
echo "$count tar archives found"
echo "tape positioned for next write"
@//E*O*F ctape//
chmod u=rwx,g=rx,o=rx ctape
echo x - goto
sed 's/^@//' > "goto" <<'@//E*O*F goto//'
# goto [arg]
# Moves the tape from the beginning
# to the [arg] filenumber.
#
# This, used with the 'all' command, allows you
# to begin restoring date the tape from a selected
# archive location.
#
# By issuing a 'goto 5' this script moves 4 tape file
# marks into the tape archive. You may tar xvf /dev/nrct0
# files/dirs.
#
# Note: A goto 1, is a NOP. You are already over position 1.
count=2
tape rewind
while [ $count -le $1 ]
do
tape rfm /dev/nrct0 2>/dev/null ||
( echo 'Tape position - at end of last archive'; exit )
echo "Over position $count"
count=` expr $count + 1`
done
if [ $count -le 2 ]
then echo 'You are already at position 1'
fi
@//E*O*F goto//
chmod u=rwx,g=rx,o=rx goto
echo x - tape
sed 's/^@//' > "tape" <<'@//E*O*F tape//'
#
# this is the /etc/default/tape file
device = /dev/nrct0
@//E*O*F tape//
chmod u=rw,g=r,o=r tape
echo x - tar
sed 's/^@//' > "tar" <<'@//E*O*F tar//'
# this is the /etc/default/tar file used
#
# device block size tape
archive0=/dev/rfd048ds9 18 360 n
archive1=/dev/rfd148ds9 18 360 n
archive2=/dev/rfd096ds15 10 1200 n
archive3=/dev/rfd196ds15 10 1200 n
archive4=/dev/rfd096ds9 18 720 n
archive5=/dev/rfd196ds9 18 720 n
archive6=/dev/rfd0135ds18 18 1440 n
archive7=/dev/rfd1135ds18 18 1440 n
archive8=/dev/rct0 20 150000 y
archive9=/dev/rctmini 20 0 y
# The default device in the absence of a numeric or "-f device" argument
archive=/dev/nrct0 20 150000 n
@//E*O*F tar//
chmod u=rw,g=r,o=r tar
echo Inspecting for damage in transit...
temp=/tmp/shar$$; dtemp=/tmp/.shar$$
trap "rm -f $temp $dtemp; exit" 0 1 2 3 15
cat > $temp <<\!!!
37 203 1169 add
24 88 541 all
4 23 133 check
25 101 620 ctape
25 131 757 goto
3 10 59 tape
15 71 524 tar
133 627 3803 total
!!!
wc add all check ctape goto tape tar | sed 's=[^ ]*/==' | diff -b $temp - >$dtemp
if [ -s $dtemp ]
then echo "Ouch [diff of wc output]:" ; cat $dtemp
else echo "No problems found."
fi
exit 0
--
Alex Internet: root@comsys.COM
Huppenthal UUCP: {cs.utexas.edu!texbell}!netdev!alex
Communication Systems Research 6045 Buffridge Tr, Dallas, TX 75252