[nslu2-linux] scsi-stop and cron-job?

Can anybody please give me a hint how to spin down my HDD if not used a while?
My system is a NSLU2 with SlugOS 5.3 LE.

The following does work fine, if invoked manually:
/opt/sbin/scsi-stop /dev/sdb

So I think about using cron - good idea?

Or will this cause trouble to attached processes? (Samba,...)
I'm not shure, but I think I saw a solution with crontab + some
kind of disk statistics, but can't google or remember anymore

(invoking '/opt/sbin/scsi-idle /dev/sdb 180' does not do the job
as it shall by documentation)

Greetings,
Mai Kee

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