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Crontab rsync does not backup to NAS device

hey guys

I have a WD MyWorldBook Edition II NAS drive that I am attempting to back up a folder (and its contents) with rsync using crontab every hour.

crontab:

Code:

00 8 * * 1,2,3,4,5 rsync -rth --log-file=/mnt/nas/backups/sync0800/changes.log /folder/ /mnt/nas/backups/sync08000/

00 9 * * 1,2,3,4,5 rsync -rth --log-file=/mnt/nas/backups/sync0900/changes.log /folder/ /mnt/nas/backups/sync0900/

00 10 * * 1,2,3,4,5 rsync -rth --log-file=/mnt/nas/backups/sync1000/changes.log /folder/ /mnt/nas/backups/sync1000/

and continues to 1800...

when I run the line in a terminal window, it runs perfectly fine, but will not do so in crontab

i have looked around on the net, and found i should do this:

Code:

chmod 0644 /etc/crontab

and:

Code:

crontab /etc/crontab

yet this has not helped.

i mapped the nas drive using this:

Code:

mount -t cifs //192.168.1.99/Private -o username=****,password=**** /mnt/nas

thanks in advance

'but will not do so in crontab' ?? What are the symptoms/error msgs?
The usual issue is that cron has a minimal env, so you need to refix all progs and files with complete paths eg

/usr/bin/rsync

instead of just
rsync

Usually cron will email the crontab owner or root with error msgs if it fails.