[ILUG] SCSI [OT]

[Ross K. Davis]

Hi,

I am having SCSI configuration problems. There are probably too many possibilities as to what's
wrong so if someone could just answer some of the following questions it would be greatly 
appreciated. Strangely enough I have looked at Adaptec/Tekram/Plextor/Western Digital website
support and have not been able to clarify the following questions!

I have a Tekram DC-390U2W SCSI card with 3 internal and 1 external connector on it.
There is a Western Digital LVD drive connected to a 68-pin 16-bit Wide Ultra2 internal connector
and a Plextor CDR and Plextor CDROM connected to a 50-pin 8-bit internal connector.
The card is automatically assigned SCSI-ID7 from what I can gather and does termination of one end
of the chain but with multiple connectors which device is actually supposed to be the other end of
the chain? Do you teminate the device with the lowest SCSI-ID, say SCSI-ID0 and does it matter
which type of device is set to do the termination?? Plextor says on it's site that the particular
CDROM I have (UltraPlex 40TSi) should be at the end, because it's an Ultra-SCSI device and needs
active termination! The Tekram adaptor manual tells you to terminate the last device on the external
connector and the last on the internal connector if you have a mix of both - are external devices
given SCSI-IDs 8-15?? Is this why it says to have two terminators set? 

Would anyone be able to suggest if SCAM should be enabled, what SCSI-IDs each device should be set to
(assuming SCAM disabled) for optimum performance and which device(s) should be terminated for this
configuration??

I have only managed to get the HDD and the CDR working together so far...but never the CDROM with either
device. I have tried the CDROM in another sytem without problems albeit a different host adaptor/devices
connected!

If anyone can plough through all this and answer anything - thanks!

Ross