IDE drive problems since RAID 0 - Help?

[MrSix]

Since buying two WD SATA 320gb AAKS drives and setting them up in a RAID0, my 'old' 120gb WD IDE drive has been acting funny...
Every so often it will click and 'spool down', then it will whirr up again moments later.
I have an ASrock 939 Dual SATA motherboard and i'm running my CD drive as the primary IDE master and the 120gb IDE HDD as the primary slave.

Does anybody have any solutions to the problem and should I worry that the drive keeps doing this as it contains all of my photographs (I'm a photographer).

 

[rpstewart]

Check the power settings in Control Panel, make sure they're not set to power the drives down.

Run WD's Lifeguard diags against the IDE drive.

Make sure your backups are up to date.