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Improper termination or faulty cable detected, please rectify. Bad drive or incompatibility?

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First post, by digicube

Posted on 
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I got this error message when I connect a Syquest SQ105 SCSI drive to Adaptec AHA-2940U2W using a SCSI3 to SCSI2 cable. I don't get this error message when I connect a Tandberg SLR4 tape drive using the same SCSI ID, cable and terminator. Is the Syquest drive defective or is it a matter of incompatibility? Syquest recommends Adaptec 1520 series ISA SCSI card, will getting it solve this problem?
Attached are the disks that came with it. Windows 98 will not load when the SCSI.sys is installed. I will install Windows 95 after I get this error message resolved.

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  • Filename
    Syquest SQ270 Floppy.zip
    File size
    1.09 MiB
    Downloads
    29 downloads
    File license
    Fair use/fair dealing exception

Reply 1 of 1, by Horun

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Not sure if this helps but back in the late 90's did a lot of work around SCSI gear. One thing that was a pain was if you had passive terminated device working with active termination devices. That applied to the adapter too.
Many 1520 adapters used passive (resistor packs) and I know the 2940 series all used active termination which could create a problem.
Another thing is the scsi bus speed. Did you go into the Adaptec BIOS (Ctrl+A) and set the speed for the ID of the Syquest to like 5Mbit ?
The 2940U2W uses ASPI8U2.SYS iirc not sure what driver SCSI.SYS is for. added: Been a long work day so am going by memory and not checking my old notes.

Hate posting a reply and then have to edit it because it made no sense 😁 First computer was an IBM 3270 workstation with CGA monitor. Stuff: https://archive.org/details/@horun

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