Backup to another machine with rsync stag

[ochid]

Dear AlI member,
I use the open source version of Zimbra 6.01 version of the operating system Centos 5.3. I'm making the script run backups with cron.

#! /bin/bash
su - zimbra -c"/opt/zimbra/bin/zmcontrol stop"
sleep 30
kill -9 `ps -u zimbra -o "pid="`
rsync -avHK --delete /opt/zimbra/ root@192.168.0.12:/mnt/HD_a4/zimbra
su - zimbra -c"/opt/zimbra/bin/zmcontrol start"
exit

but I got an issue when running the script will itu.Rsync Stag when it comes to the folder /opt/zimbra/db/data/mboxgroup10/mail_item.ibd.if i see the folder size : -rw-rw---- 1 zimbra zimbra 17825792 Dec 10 11:45 mail_item.ibd
in crontab only one command and make sure my zimbra log was dead all. maybe there is a similar case please advice.

Thank's very much.