Faulty format script

[Shaitan]

The first crontab "event" in my backup routine is a script/command to format an external firewire disk to prepare for filecopying. I've had the script running for 5-6 months without a hitch, but this last week it's been really troublesome and effectively non functional halting the entire backup process.

Here's my script

#!/bin/csh -f
/usr/sbin/diskutil eraseDisk HFS+ Onsdag /volumes/Onsdag

The crontab entry

0       20      *       *       3       /bin/sh -c "/library/firstclass\ server/sh/format-onsdag.sh"

The result delivered to my mailbox is:

Message 6:
<snip>
Subject: Cron <xxx@xxxmain> /bin/sh -c "/library/firstclass\ server/sh/format-onsdag.sh"
X-Cron-Env: <SHELL=/bin/sh>
X-Cron-Env: <HOME=/Users/xxx>
X-Cron-Env: <PATH=/usr/bin:/bin>
X-Cron-Env: <LOGNAME=xxx>
X-Cron-Env: <USER=fxxx>
Date: Wed, 24 Nov 2004 20:00:19 +0100 (CET)


Partitioning encountered error Could not unmount disk (-10000) on disk disk3
Started erase on disk disk3
Creating Partition Map
Could not unmount disk for zeroing

When run manually (sh./format-onsdag.sh) the "script" executes perfectly, and no changes has been changed in regard to crontab or format-onsdag.sh during the last couple of months.

Any ideas what could be happening here, and maybe even how to correct ir?


Thanks

 

[Darkshadow]

Does the user that cron is being run as have permission to unmount the drive? It appears that the script isn't working because it isn't able to unmount the drive. Also, make sure there aren't any programs using files / no open files on the drive or else you won't be able to unmount it with any user (including root).