backup question

[qualispace]

Hello,
I have a backup script that will create a tar.gz file of each website and copy the file in another drive. I have Plesk 7.5 Reloaded. The following is the script

# eg : sourcedir="/usr/local/psa/home/vhosts"
#sourcedir="Put in the path of the source folder"
sourcedir="/home/robinson/temp/test"

# eg : backupdir="/backupdrive"
#backupdir="Put in the path of the destination folder"
backupdir="/home/robinson/temp/dest"


for i in `ls $sourcedir`
do
tar -cpzf $backupdir/$i.tar.gz $sourcedir/$i --exclude "$sourcedir/logs"
done

Can anybody tell me if the above script will work fine or not? Also tell me where are the access_log files stored for all the websites in Plesk 7.5 Reloaded.

Thanks
Regards
Nitesh