SCSI Adapters

Using the correct scsi adapter is crucial to the ability of your scsi drives and peripherals to work properly at their maximum speed -- or at all...
SCSI Adapters have different types of connectors and/or "genders" of connectors on each end. They are used for connecting a device with one type of connector to a cable or other device with another type of connector. Unfortunately there have been quite a few "standard" connectors over scsi's long history. As scsi got faster and "wider", it was necessary to update the connector types to newer, "better", "faster" connector types. So of course with the advent of new connectors came the need for adapters.  An important issue to keep in mind is the "wide" and "narrow" or "high byte" "low byte" problem. "Wide scsi" means 16 bit or 2 "bytes" (8 bits make a byte). Narrow scsi is 1 byte (8 bits). Connecting wide devices to a narrow bus or narrow devices to a wide bus must be done with the proper adapter which takes the termination problems into account. Wide scsi devices will work just fine using only the first byte, and therefore can be used on a narrow bus (cable) as long as their connected using a scsi adapter with high byte termination. Narrow devices can be used on a wide bus, without problems depending on whether or not they are connected to an "LVD" (Low Voltage Differential) segment. Connecting narrow devices to an LVD bus will cause that segment to drop out of LVD mode. Feel free to contact us with your SCSI Connectivity Issue. 

SCSI Information:
   •The basics for newbies and technical information
   •Connectivity FAQ
   •Connector Pictures

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Adapter, SCA 2 female connector to HD68 Female. Ultra2/U160/LVD compatible.


Adapter SCA-80 Female to Wide SCSI-3 HD68 Female. Ultra2/U160/LVD compatible.


IDC50 Male to HD68 Female SCSI Adapter, on Bulkhead bracket


HD68 male to IDC50 male adapter with High Byte Termination, offset connectors on vertical adapter.


External HD68 Female to HD50 Male SCSI Adapter, with Active High Byte Termination


IDC50 female to HD68 female Adapter, for connecting tape drives, CDROMs or non-wide hard drives to Wide SCSI internal cables. HD68 is often called HPDB68 or MiniD68. This Adapter has no high byte termination, so it is ideal for narrow drives in the middle of a Wide cable. Using a high byte terminated adapter in the middle of a wide cable would normally cause extreme problems.


SCSI Internal-External Adapter IDC50 male to HD50 Female on L Bracket. IDC50 male internal connector to adapt SCSI-1/SCSI-2 systems with no external connector to have an external SCSI 50-pin High Density connector (HPDB50) (HPDB50 / MiniD50 female mounted on bulkhead bracket


Internal/External SCSI Adapter, HD68 Female to Female, on L Bracket for standard Rear Bulkhead Slot Covers


SCA SCSI Adapter, SCA80 Female to IDC50 Male and HD68 Female

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