SCSI -3 and SCSI-2 compatibility

[RanDum72]

I have an Adaptec 2906 PCI SCSI-2 controller and tried to hook up a Yamaha 8x8x24 SCSI-3 burner on it (packed by Pacific Digital). My system can detect the drive but the drive won't read a single CD. I have an old Toshiba 4x CD-rom and a 1.6gig DEC drive that run fine with the controller so I know the Adaptec is OK. Is there an issue with running SCSI-3 drives on a SCSI-2 controller? I thought that the worst thing the SCSI-3 drive will do is go down to SCSI-2 transfer rates. The SCSI ID's were fine, terminated properly (external SCSI scanner and internal SCSI CD-burner).

System:
AMD Duron 700
MSI K7T Pro2 Mobo
256mb PC133 ram cas2
40gig Maxtor 7200rpm ATA-100
TDK VeloCD 12x10x32 IDE burner(this is from my other PC)
10xDVD(IDE)
Promise Ultra-100 controller
Adaptec 2906 PCI (no boot option)

Misc. testing equip.:
4x Toshiba CD-rom
1.6g DEC SCSI-2 harddrive

E-mail me at RDUMAPLIN@bak.rr.com and/or post in this board.

Thanks.

 

[mastertech01]

I doubt it is a SCSI 3 ..it may be Ultra SCSI-2 20MPS.. Use an Ultra SCSI card for best results. It should still at least work. You may have a drive problem. Make sure you have the drive properly terminated and ID set for it correctly and I always use Parity enabled.

 

[RanDum72]

Yes, I think they mean Ultra SCSI when they say SCSI-3 since its only a 50pin connection. The drive was terminated properly, even experimented with turning parity on/off set it to different SCSI ID's, detached my SCSI scanner just to make sure there is no conflict, etc. The darn drive doesn't want to read a single CD but my system can find it. Its probably a drive problem. Returned it for an exchange but out of stock so I got another TDK VeloCD 12x10x32 "BurnProof" IDE burner. NOw I'm happier