Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!sdd.hp.com!hp-pcd!hpfcso!rjn
From: rjn@hpfcso.FC.HP.COM (Bob Niland)
Newsgroups: comp.sys.hp
Subject: Re: Using the DDS drive
Message-ID: <7370316@hpfcso.FC.HP.COM>
Date: 21 Feb 91 21:54:03 GMT
References: <1991Feb14.233141.10571@objy.com>
Organization: Hewlett-Packard/FSY Ft.Collins,CO,USA
Lines: 56

re: > I would appreciate some help from anyone who has experience using the
    > HP DDS drive with standard UNIX backup utilities, e.g.  tar and cpio.
    > I can't seem to write CPIO files to the drive no matter what I do.
    
Working example:

#SCSI Device File:
crw-rw-rw-   2 root     other     54 0x0d0403 Feb 18 03:17 /dev/rdat

#Fragments of /etc/backup.  Changes/additions are > flagged.
#(/etc/datdest contains "/dev/rdat")
 ...
destfile="/etc/datdest"		# file containing backup destination  
 ...
 ...
# Do the backup:

        if [ "${aflag:-yes}" = "yes" ]  # doing an archive
        then
                # remember the date/time backup started
                touch ${archive}.x
        fi

        echo "s `date` `uname -r` $aecho" >>$backuplog
        cd /
>       mt -t $dest rew

        {       find $backupdirs $aflag -hidden -print  |
>               cpio -ocBx > $dest
        } 2>>$backuplog                 # log stderr only.

        echo "f `date`" >>$backuplog

        if [ -f ${archive}.x ]  # did an archive
        then
                mv ${archive}.x $archive        # save the new archive time
        fi

# Finish up after backup:

        echo "\007Backup complete at `date`"
>       mt -t $dest eof 2
>       mt -t $dest offl &
        touch $remind                   # make reminder file.

Comments:

* Device file is BSD personaility w/no-rewind-on-close.
* Script therefore starts with a rewind to be on the safe side.
* Two EOFs written after archive to prevent reading old junk on restore
  from used tape.
* Final rewind-offline to eject tape (SCSI only).

Regards,                                              Hewlett-Packard
Bob Niland      Internet: rjn@FC.HP.COM               3404 East Harmony Road
                UUCP: [hplabs|hpfcse]!hpfcrjn!rjn     Ft Collins CO 80525-9599


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