>Can someone explain to me why there are 50 pin, 68 pin and 80 pin SCUSI
>controllers. Is it to do with evolved versions?
They're all different SCSI _connectors_.
Generally, the size of the connector relates to the size of the data
path. Larger connector -- as in increased number of pins -- generally
allows for a larger data path.
50-pin transfers 8 bits (1 byte) at a time.
68-pin transfers 16 bits (2 bytes) or 32 bits (4 bytes) at a time.
(To do 32 bits, a second 50-pin cable is utilized.)
80-pin transfers 16 bits (2 bytes) at a time. Connector also
transfers power to device.
There are also:
110-pin transfers up to 32 bits (4 bytes) at a time.
Firewire is also a SCSI-bus connection.
There are many good sites about SCSI. <http://www.scsita.org>
Someone correct me if I've mistaken anything.
Cheers,
Mike Whalen
--
The NOSPIN Group Promotions is now offering
Mandrake Linux or Red Hat Linux CD sets along
with our NOSPIN Power Linux CD... at a great price!!!
http://freepctech.com/goodies/promotions.shtml