Backup software

[Derek Atkins]

What does 'file tapevol.tgz' give you?

Are you sure you're using the LinuxTar target and not the Linux
targer?  The latter will use dump...

I would recommend trying to do this by hand before using
a script.

-derek

jbk <jbk at mail2.gis.net> writes:

> >Executing the following did not access the tape device.
> 
> # dd if=/dev/nht0 | cat > tapevol.tgz
> 61433+0 records in
> 61432+0 records out
> 
> [root at kelly-rand tape3]# ls
> total 30756
> 
> -rw-r--r--    1 root     root     31453696 Dec 16 21:57
> tapevol.tgz
> 
> # mv tapevol.tgz tapevol
> 
> ]# head tapevol
>  with link time reference (no version symbols)]
> ' [ (lazy)
> 
> 
> relocation processing: cannot make segment writable for
> relocation' has different size in shared object, consider
> re-linking
> : Symbol `<program name unknown>: profiler found no PLTREL
> in object : profiler out of memory shadowing PLTREL of can't
> restore segment prot after relocDST not allowed in SUID/SGID
> programsempty dynamics string token substitution' because of
> empty dynamic string token substitution
> cannot load auxiliary `
>  requested by file=load auxiliary object=load filtered
> object=cannot allocate dependency listcannot allocate symbol
> search listcannot load shared object fileout of
> memoryDYNAMIC LINKER BUG!!!
> : : error while loading shared libraries: <program name
> unknown>
> 
> >Is the above error mssg relevant ?
> 
> This is the backup script as I used it.
> $TAPE is local to this script, I could make it an
> environment variable but why bother at this stage? /dev/nht0
> is one and the same.
> ###############################
> #!/bin/bash
> # backup
> 
> append() # append item to backup list table
> {
>     n=${#blist[*]}
>     blist[$n]=$1
> }
> 
> # Backup table
> #
> #     host    platform  filesystem   levels
> (Full/Incremental MTWTF)
> # append 'loki       LinuxTar /mnt/windows/gbb  I I I F I'
> #####################
> # append 'raijin     Linux    /dev/hda1   I I I F I'
> #####################
> append 'localhost       LocalTar /etc     F I I I I'
> append 'localhost       LocalTar /var          F I I I I'
> append 'localhost       LocalTar /usr/local  F I I I I'
> append 'localhost       LocalTar /home/Dad  F I I I I'
> #####################
> 
> # Using 'dd' to write the tape avoids requiring .rhosts on
> artemis (owner
> # of the tape drive) giving access to root from the other
> systems.  If
> # the command were of the form 'rsh <remothost> dump f
> artemis:/dev/rst0',
> # artemis would need to give root rsh privileges to
> <remotehost>.  Not doing
> # this avoids giving system wide superuser privileges to
> people with Unix
> # machines on their desks, while allowing those same people
> to have
> # superuser privileges for the machines on their desks.
> #
> 
> TAPEDEV=/dev/nht0
> WRT_TAPE="dd of=$TAPEDEV obs=126b"
> 
> error_exit()
> {
>     echo "The nightly backup failed" | mail -s "backup
> failed" backuplist
>     mt -f $TAPEDEV rewoffl
>     exit
> }
> 
> dump_host() # args: host platform filesystem levels
> day_of_week
> {
>     echo '####################'
>     date
>     # first test if we can access remote host
>     # rsh -n $1 echo
>     # if [ $? != 0 ] ; then
>     #    echo "rsh to $1 failed" | mail -s "backup failed"
> backuplist
>     # return
>     #  fi
> 
>     day=$(($9 + 2))
>     level=${!day} # evaluate $day'th positional argument
> 
>     if [ $level = F ] ; then
>  dl=0
>  echo File $fileno: Full backup of $3 on $1
>     else
>  dl=5
>  echo File $fileno: Incremental backup of $3 on $1
>     fi
> 
>     case $2 in
>  SunOS)   rsh -n $1 /etc/dump ${dl}uf - $3 | $WRT_TAPE ;;
>  Solaris)  rsh -n $1 /usr/sbin/ufsdump ${dl}uf - $3 |
> $WRT_TAPE ;;
>  Linux)   rsh -n $1 /sbin/dump ${dl}uf - $3 | $WRT_TAPE ;;
>  LinuxTar) if [ $level = F ] ; then
>       rsh -n $1 tar zcf - $3 | $WRT_TAPE
>     else
>       rsh -n $1 tar zcf - -N \"7 days ago\" $3 | $WRT_TAPE
>     fi ;;
>  LocalTar) if [ $level = F ] ; then
>      tar zcf - $3 | $WRT_TAPE
>     else
>      tar zcf - -N \"7 days ago\" $3 | $WRT_TAPE
>     fi;;
>     esac
> 
>     if [ $? != 0 ] ; then error_exit ; fi
> 
>     fileno=$(($fileno + 1))
> }
> 
> date
> mt -f $TAPEDEV rewind
> if [ $? != 0 ] ; then error_exit; fi
> 
> #
> set -v
> # cd /root/backup
> 
> # Put a copy of the backup scripts on the tape as File 0
> # tar cvf $TAPEDEV backup pc.backup
> # if [ $? != 0 ] ; then error_exit; fi
> 
> # Determine backup level for today.  Get the day of the
> week, and
> # add in the offset to the backup level arguments.  The
> crontab entries
> # run backups starting at midnight, Monday night - Friday
> night, so
> # the day of week numbers will be 2-6.  The level arguments
> start at $4.
> 
> if [ $# -eq 1 ] ; then
>     case $1 in
>  Mon)    day_of_week=2 ;;
>  Tue)    day_of_week=3 ;;
>  Wed)    day_of_week=4 ;;
>  Thu)    day_of_week=5 ;;
>  Fri)    day_of_week=6 ;;
>  *)  echo use day of week in lowercase
>      exit ;;
>     esac
> else
>     day_of_week=$((`date +%w`))
>     if [ $day_of_week -lt 2 ] ; then day_of_week=2 ; fi
>     if [ $day_of_week -gt 6 ] ; then day_of_week=6 ; fi
> fi
> 
> # Main loop.  Execute the backup for each host entry.
> fileno=1
> i=0
> while [ $i -lt ${#blist[*]} ] ; do
> 
>     dump_host ${blist[$i]} $day_of_week
> 
>     i=$(($i + 1))
> done
> 
> date
> echo File $fileno - 'M$-win units'
> #/root/backup/pc.backup $fileno
> 
> mt -f $TAPEDEV rewoffl
> 
> #End of backup script
> ###############################
> 
> Jim Kelly-Rand
> 

-- 
       Derek Atkins, SB '93 MIT EE, SM '95 MIT Media Laboratory
       Member, MIT Student Information Processing Board  (SIPB)
       URL: http://web.mit.edu/warlord/    PP-ASEL-IA     N1NWH
       warlord at MIT.EDU                        PGP key available