3 Sep
2006
3 Sep
'06
11:42 p.m.
Roy J. Tellason wrote:
On Sunday 03 September 2006 04:14 pm, jim stephens
wrote:
Since SCSI devices are selected via individual data bits,
a wide device having an ID > 7 would be selected via DATAn
(where n > 7). A narrow device (initiator) doesn't *have*
those data lines connected to it (hence no way for it to
select a device > 7)
Only when you go from 50 -> 68 pin should you
beware of
termination on the upper 8 bits added by the extra lines and
what you have for an initiator and targets.
There is not much science in a wide initiator selecting narrow
devices on a chain, but there is when you have wide targets and
a narrow initiator.
What sort of problems would you expect doing this? My first SCSI setup some years back involved a wide
drive with an adapter, a
50-wire ribbon cable, and an Adaptec 2842 which worked fine until a storm
rolling through here took out the drive, the 2842, and the MB. :-(