The RZ29's I have came out of StorageWorks boxes. I'm assuming it's a
standard RZ29 in those boxes. I figured though since RZ26L and RZ28 are
50-pin that a RZ29 would be 50 pin also. Big surprise to see it's a
68-pin drive!
On the drive it says RZ29B-W... Guess the W means "Wide". Is there just
a standard RZ29 that is SCSI-2 50-pin?
-----Original Message-----
From: cctalk-admin_at_classiccmp.org [mailto:cctalk-admin_at_classiccmp.org]
On Behalf Of Jerome H. Fine
Sent: Sunday, June 09, 2002 5:49 PM
To: cctalk_at_classiccmp.org
Subject: Re: 50 & 68 pin SCSI-2
>Bob Lafleur wrote:
> I've got 50-pin SCSI-2 connectors inside my MicroVAX 3100. Is there a
> way to use 68-pin devices? The RZ26L and RZ28's in it are 50-pin, but
> I have some RZ29's that are 68-pin and I'm wondering if there is in
> adapter? I suspect not, but just asking.
Jerome Fine replies:
I can't help you with the RZ29. I use only the RZ28.
> If I'm not mistaken, it is possible to "go the other way" and use
> 50-pin devices on a 68-pin cable with an adapter that terminates that
> "extra" lines, correct?
I normally get my RZ28 drives by opening an RZ28D-VA
box. If you can use them, they convert the RZ28 (which
is just an ST32550N drive from Seagate) into the 68 pin interface. I
can use a few more, so contact me off list if you want to arrange for me
to buy some RZ28D-VA boxes which contain the ST32550N drives. Normally,
I buy about 10 at a time. They are quite useful to run RT-11 when
attached to a host adapter either on a PC (PCI Adaptec AHA-2940AU) or on
a real PDP-11 (Qbus CQD 220/TM). Each RZ28 can hold almost 31 RT-11
partitions. Under Ersatz-11 on a PC, each ST32550N drive can have its
own device driver under RT-11 EVEN though it is connected to the same
SCSI host adapter.
Sincerely yours,
Jerome Fine
--
If you attempted to send a reply and the original e-mail address has
been discontinued due a high volume of junk e-mail, then the
semi-permanent e-mail address can be obtained by replacing the four
characters preceding the 'at' with the four digits of the current year.
Received on Sun Jun 09 2002 - 22:18:42 BST