Add SCSI disks to NT Server yields wrong drive letter

[nolacoaches]

I have an NT 40 server that I really need to add some disk space to. It currently has a DAC960 RAID controller with RAID 5 disks configured as the C: drive and E: drive. and a CD as drive D:
I added an external SCSI drive to an Adaptec 2940 controller and when NT boots, it labels the new drive C: and changes the C: to F:
Changing F: back to C: in Disk Admin doesn't work.
In the boot up sequence I see the DAC960 identify 1 system disks, THEN the Adaptec recognizes DISK 1, but in NT Disk Admin it sees them reversed, the Adaptec drive is DISK 0.
The SCSI environement is:
Device: Port, Bus, Target, LUN
CD-ROM 0,0,1,0
Adaptec Ecrix 1 tape 1,0,6,0
Adaptec disk 1,0,4,0
DAC960 DAC960 2,3,0,0
DAC960 GAM 2,4,6,0

Is there anything I can do to stop NT from changing the drive letter of the C: partition on the RAID?

Never stay up on the barren heights of cleverness, but come down into the green valleys of silliness.
Ludwig Wittgenstein

 

[Koonan]

Drive letter assignment can get screwy when you add new adapters.

Try this

http://support.microsoft.com/kb/141832/en-us.

 

[nolacoaches]

Perfect solution. All I had to do was swap the TAG value of the 2 adapters and when NT booted I had my new drive.

Thanks.

Never stay up on the barren heights of cleverness, but come down into the green valleys of silliness.
Ludwig Wittgenstein