> From: Jeff Walther <[EMAIL PROTECTED]>
> Subject: Re: [PCI] 9500 hd query
> 
>> Date: Sat, 23 Jul 2005 11:58:32 +1000
>> From: David Elmo <[EMAIL PROTECTED]>
> 
>>> From: Andrew Popovich <[EMAIL PROTECTED]>
>>> Subject: Re: [PCI]
> 
>>> sure you can add internal SCSI Drive to your PM as it has integrated
>>> SCSI-2 adapter. It must be SCSI 50-pin HDD (Maximum 9.1 Gb, as I
>>> remember)
>>> 
>> 
>> You can get 18G too. Try http://Afterthemac.com
> 
> If you read the fine print, you'll find that these jokers are *not*
> selling 50 pin drives.  They are selling SCA (80 pin) drives with
> adapters to 50 pins.
> 
> Because they provide technical support, and because that
> configuration can be made to work, this may be okay.  However, based
> on the years of postings here and elsewhere, unless you really know
> SCSI, using an adapted SCA drive is a recipe for headache, heartache
> and the heartbreak of SCSIriasis.
>
>

I must confess that I was surprised to receive an 80 pin with an adaptor
when I got my 18G "50 pin". Lately I have been wondering about some issues.
I put it in an external box for quite a while, it had a unique ID and the
box scsi out port had a terminator on it (being at the end of an external
chain). It would sometimes not mount (I would turn it on before startup for
a while). A scsi probe 5 soon mounted it and I was able to back up things on
the rarish occasions I used it. I believe someone else posted a similar
issue recently. Still, I was "happy" with it.

But I must confess too that now I am wanting to put it inside a 7600 or
7300, I am a bit unsure of the pin configs. The adaptor to 50 has no obvious
for termination. The hd itself does and I use it. But the hd itself also has
pins for ID but I use the adaptor pins to set the id. There is confusion in
my mind as to the effectiveness of the jumper pins on the HD itself in
relation to the adaptor. So, I am exhibiting to some extent the truth of
your remarks.

I took the 80 to 50 adaptor off the other day, and put a 80 to 68 adaptor I
had on and stuck the thing on a U2B scsi card in a 7300 I keep open on a
bench for testing stuff. The ribbon cable was a fancy one with an active
terminator at the end... so I only jumpered a pair of pins for autospin. It
worked faster of course but I am looking at some issues of stability. I know
about half of what I am doing.

David Elmo
 


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