I was serching for an odd sound in my case and I unplugged my storage drive.... When I plugged it back in and booted, I got the msg that it cant find the Op system. So it was looking at my storage drive for my operating system. Only way it runs now is without the storage drive conected.
Is there any way to get it to hold priority over the other drive?

More details please. Type of drives and notably whether internal or external - whether PATA/SATA/SCSI etc.

Have you chedked the MAIN and the RAID bios boot order??

More details please. Type of drives and notably whether internal or external - whether PATA/SATA/SCSI etc.

Have you chedked the MAIN and the RAID bios boot order??

All drives are internal.
I have 2 maxtor Raptor drives RAID'ed.
1 250 gig storage drive SATA
Its a ABIT AN7 Mobo...

I assume that something changed priority when I booted without the storage drive and when I pluged it back in it wont look at the RAID first and wants me to enter a disk and hit any key.

In your BIOS setup can you choose between SATA and SCSI? If so you need to set SCSI before SATA in order to boot the RAID set. In the RAID/SATA BIOS setup you need to set the boot device to the RAID set.

I dont see that setting in BIOS...and in the RAID BIOS I only seem to have format and create options :/

Same here.
My BIOS has no "Boot from SCSI" setting.
Apparently, if you have a HDD connected to your onboard IDE controller, but you want the PC to boot from the HDD on the controller card, you need this setting to tell it to boot [NOT from the onboard HDD, but] from the HDD on the card.
I think if you don't have such a setting in the BIOS you must not fit a HDD to any onboard controller.
Do you [like me] have 2 controllers/connectors on the card?
Could you connect your HDD's to these only and use the onboard controllers for optical drives?

Is the RAID and/or the 250gig SATA (a) on-board or (b) attached to a pci-card.

I have 2 maxtor Raptor drives RAID'ed.
Maxtor didn't make Raptors which are Western Digital SATA drives. When I saw Raptor I thought SATA but are these actulaly PATA drives?

I think if you don't have such a setting in the BIOS you must not fit a HDD to any onboard controller. Well the "odd" thing is that the hardware was functioning before the storage drive was unplugged.