gzip archives coming up invalid!

From: Chris W. Parker (cparker_at_swatgear.com)
Date: 01/06/05

  • Next message: SW: "Setup syslog for firewall log message {Scanned}" 
    Date: Thu, 6 Jan 2005 12:32:56 -0800
To: "General Red Hat Linux discussion list" <redhat-list@redhat.com>

    Hello,

    I've been running a script in /etc/cron.daily that tar's the /etc,
    /home, and /var directories and then gzip's them. After the gzip they
    are FTP'd to a backup server.

    I've just had the need to retrieve a file in one of the backups and it
    turns out they are all corrupt! This is not good. :(

    [root@hachiroku ~/temp]# gzip -t 01-01-05.home.tar.gz

    gzip: 01-01-05.home.tar.gz: invalid compressed data--format violated
    [root@hachiroku ~/temp]#

    This is the script I am using, maybe there is a problem with it?? Or
    maybe the corruption is happening during the FTP transfer?

    =-=-=-=-=-=-=
    #!/bin/bash

    # set variables
    DATE=`date +%m-%d-%y`
    OLDDATE=`date +%m-%d-%y --date '7 days ago'`

    # make sure we are executing the following commands from the correct
    directory
    cd /

    # make the /var archive
    tar -cW --totals --label $DATE.var -f $DATE.var.tar /var
    gzip -9 -S .gz $DATE.var.tar

    # make the /etc archive
    tar -cW --totals --label $DATE.etc -f $DATE.etc.tar /etc
    gzip -9 -S .gz $DATE.etc.tar

    # make the /home archive
    tar -cW --totals --label $DATE.home -f $DATE.home.tar /home
    gzip -9 -S .gz $DATE.home.tar

    echo "*** connecting to ftp and uploading files"

    ftp -n ati-nas-01.ati.local > /var/log/lastbackup << endend
    user user password
    cd /linuxbackup/hachiroku
    pwd
    bell
    del $OLDDATE.var.tar.gz
    del $OLDDATE.etc.tar.gz
    del $OLDDATE.home.tar.gz
    put $DATE.var.tar.gz
    put $DATE.etc.tar.gz
    put $DATE.home.tar.gz
    ls
    quit
    endend

    #echo "*** Removing Backup Files"
    rm -f $DATE.*tar.gz

    #echo "*** Done"
    exit 0
    =-=-=-=-=-=-=-=-=

    Any ideas would be appreciated!

    The average size of the compressed /var file is ~68MB. /etc is ~1.5MB.
    /home is ~50MB.

    Thanks,
    Chris. 

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