Skylar Thompson wrote:

>On 17 Jul 2004 14:52:53 -0700, Stuart Norris <stuie_norris@yahoo.com.au> wrote:
>  
>
>>Hello All,
>>
>>I have an Alpha station 200i 4/100.  
>>
>>I am finding it very hard to get 50 pin SCSI disks that are good enough to use.
>>
>>I have several RZ29 drives with a 68 pin interfaces.  
>>
>>If I buy a female 50 pin to female 68 pin SCSI adapter can I connect this adapter to
>>the mother board and run the 68 pin drives.  The 68 pin SCSI cable I have states 
>>that all the drives including the last must be unterminated.
>>
>>From a gender point of view this will work. 
>>
>>Will this work from a SCSI point of view?
>>    
>>
>
>It should, since SCSI is fairly implementation-independent. Just make sure
>your SCSI IDs are all < 7.
>  
>
and make sure that if you have a mix of 8 and 16 bit devices in the
chain, that the 16 bits are after the 8 and that you are getting good
device termination power for the termination.

Barry

-- 

Barry Treahy, Jr                       E-mail: Treahy@MMaz.com
Midwest Microwave                          Phone: 480/314-1320
Vice President & CIO                         FAX: 480/661-7028

"Barry Treahy, Jr." <Treahy@MMaz.com> wrote in message news:<40FB4B6F.2050009@MMaz.com>...
> Skylar Thompson wrote:
> 
> >On 17 Jul 2004 14:52:53 -0700, Stuart Norris <stuie_norris@yahoo.com.au> wrote:
> >  
> >
> >>Hello All,
> >>
> >>I have an Alpha station 200i 4/100.  
> >>
> >>I am finding it very hard to get 50 pin SCSI disks that are good enough to use.
> >>
> >>I have several RZ29 drives with a 68 pin interfaces.  
> >>
> >>If I buy a female 50 pin to female 68 pin SCSI adapter can I connect this adapter to
> >>the mother board and run the 68 pin drives.  The 68 pin SCSI cable I have states 
> >>that all the drives including the last must be unterminated.
> >>
> >>From a gender point of view this will work. 
> >>
> >>Will this work from a SCSI point of view?
> >>    
> >>
> >
> >It should, since SCSI is fairly implementation-independent. Just make sure
> >your SCSI IDs are all < 7.
> >  
> >
> and make sure that if you have a mix of 8 and 16 bit devices in the
> chain, that the 16 bits are after the 8 and that you are getting good
> device termination power for the termination.
> 
> Barry

Unfortzunately, it isn't that simple. www.paralan.com has a nice
overview about the current SCSI standards. From what you write I
expect that you have "wide" SCSI drives. If you have also a "wide"
SCSI controller in you Alpha, than there will be no problem, but since
you mention 50 pin I guess that you have a "narrow" SCSI controller.
Adaptec sold an adapter to connect 8 bit (narrow) and 16 bit (wide)
devices, where the unused connections are proper terminated. The
simplest way to use you drives would be to get a used ultra-wide SCSI
controller.