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Internal SCSI locks system

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Anonymous   11-24-2000 at 11:07:05 AM

I've got an SCSI card (Adaptec AHA 2910c) installed into my PC. This works fine with a scanner.
Any time I try to connect (simply connecting the cable is enough to get the problem) an internal peripheral (DVD drive, Jaz drive) the system (Win98) locks up at start...
[Motherboard is a Chaintech CT-6ATA2]

Note
All works fine with this very same card and peripherals when installed in another machine (Siemens Nixdorf, Siemens motherboard)

Any idea?

TIA,
--
Jean-Francois Nifenecker, Bordeaux (Europe)
jfnif@compuserve.com

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Anonymous   11-24-2000 at 02:02:06 PM
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I only use and old 1-device scsi card for my scanner, so I don't have much experience at this. Are your new internal devices terminating the scsi bus correctly? I don't know that card, but if it's a "1-type of scsi" card (e.g., scsi-2 for external and internal), I would think that adding an internal device would extend the existing scsi bus and therefore require that your new peripheral be the new termination point.

Mike

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Anonymous   11-24-2000 at 03:46:53 PM
- 0 +

Mike,
Thanks for your suggestions.

Everything is OK here, the peripherals have the 'termination' jumper set (Jaz drive has none, but I've added a Pioneer DVD-drive which has one).

Some more info : when using an Adaptec AHA1505 (ISA) card, instead of the 2910 (PCI) everything is OK!
Testing the same two sets (ie AHA2910 [pci] + Jaz + DVD, and AHA1505 [isa] + Jaz + DVD) on another machine gives the same results, ie the former locks while the latter doesn't!

Does anyone know is there is some configuration available for the PCI connectors? Could bus speed have any consequence in that matter?
Well, this thread turns to be Motherboard-Oriented, may be I should ask there?

Thanks for any suggestion, now I'm lost...
--
Jean-Francois Nifenecker, Bordeaux (Europe)
jfnif@compuserve.com

Reply to Anonymous
Anonymous   11-24-2000 at 07:09:37 PM
- 0 +

Okay, last post in this becasue you obviously have more experience with this than I do. I've always been curious about scsi, so I downloaded the manual from adaptec's web site (it beats reading all the silly P4 arguments on this forum...which I don't). What's throwing me off is that this hardware works fine in that one system. I'm sure you checked this, but is it possible that the software setup is different in the PC that works? I came accross a warning in the 2910C user guide that says:

<b>Caution: If you are attaching an AHA-2910C between two temininated SCSI devices, or if you are using both internal and external SCSI devices, you must disable host adapter SCSI termination with SCSISelect....</b>

I mention it only because you didn't. No need to respond unless it actually helps.

Mike

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