5 Jan
2004
5 Jan
'04
5:24 a.m.
I wanted to revive my MicroVax II (BA23 cabinet I think) and add
RZ74 (4GB drive) to it. I am writing number from memory, perhaps
I have made mistakes. Will this card on Ebay do the trick?
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2775848822&categ…
I believe this might be the easiest way to get SCSI support
on my machine, but perhaps this card is incompatible, or
drive is too big?
I do not have a lot of experience with VMS but want to play
around some on this smaller somewhat old equipment.'
Bradley Slavik
5 Jan
5 Jan
7:25 a.m.
fire(a)dls.net wrote:
I wanted to revive my MicroVax II (BA23 cabinet I
think) and add
RZ74 (4GB drive) to it. I am writing number from memory, perhaps
I have made mistakes. Will this card on Ebay do the trick?
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2775848822&categ…
I believe this might be the easiest way to get SCSI support
on my machine, but perhaps this card is incompatible, or
drive is too big?
I do not have a lot of experience with VMS but want to play
around some on this smaller somewhat old equipment.'
Bradley Slavik
Jerome Fine replies:
This card is NOT designed for the BA23 box. Rather
it looks like the type that would be used with a BA213
box.
But, the price seems correct (if it works) if you are able
to take off the handles and add the see needed for the
1/2" spacing on a BA23 box.
Perhaps someone else can comment if it is a true SCSI
host adapter for a Qbus system that will handle SCSI
drives of the 4 GByte flavour?
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.
8:08 a.m.
A good question to ask is if the QBus in a BA23/uVII is
electrically the same as the one in the BA213/uVIII.
If it is then I'd say go and get the card, even with the
appendages on it.
John A.
10:10 a.m.
On Mon, 5 Jan 2004 17:08:39 -0500
"John Allain" <allain(a)panix.com> wrote:
A good question to ask is if the QBus in a BA23/uVII
is
electrically the same as the one in the BA213/uVIII.
If it is then I'd say go and get the card, even with the
appendages on it.
QBus is QBus. The only difference is that the BA23 has 3 Q/CD and
5 Q/Q
Slots and the BA2xx boxen have only Q/CD slots (no serpentine). Ahh, the
card spaceing and the handles are different. But BA132 / BA23 cards fit
into a BA2xx or BA4xx without problem.
Unfortunately this SCSI adapter is worthless. AFAIK the KZQSA does _not_
support MSCP / TMSCP. It was intended as a "tape only adapter" for VAX
4000 systems.
--
tsch??,
Jochen
Homepage: http://www.unixag-kl.fh-kl.de/~jkunz/
1:40 p.m.
fire(a)dls.net wrote:
I wanted to revive my MicroVax II (BA23 cabinet I
think) and add
RZ74 (4GB drive) to it. I am writing number from memory, perhaps
I have made mistakes. Will this card on Ebay do the trick?
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2775848822&categ…
I believe this might be the easiest way to get SCSI support
on my machine, but perhaps this card is incompatible, or
drive is too big?
Uhm... be *very* careful with connecting these drives, and the
KDA50 controllers, to the BA23 power supply. Most of these
will *not* be able to handle them together, since the KDA50
controller (SDI to QBus) is a power-hungry monster.
Other than that, the drive would work just fine on the VAX.
--f
2:30 p.m.
Fred may be talking about the RA74 (contrasts with the RZ74) here. -jea
RA's go to KDA50's doing SDI
RD's go to RQDX's doing MFM/RLL
RF's go to KFQSA's doing DSSI
RZ's go to KZQSA's doing SCSI
I believe some list members have attached the four disk types all to
a system at once and have succeeded, using a wide QBus cabinet.
> I wanted to revive my MicroVax II (BA23 cabinet I
think) and add
> RZ74 (4GB drive) to it. I am writing number from memory, perhaps
> I have made mistakes. Will this card on Ebay do the trick?
>
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2775848822&categ…
rd=1
> I believe this might be the easiest way to get
SCSI support
> on my machine, but perhaps this card is incompatible, or
> drive is too big?
Uhm... be *very* careful with connecting these drives,
and the
KDA50 controllers, to the BA23 power supply. Most of these
will *not* be able to handle them together, since the KDA50
controller (SDI to QBus) is a power-hungry monster.
Other than that, the drive would work just fine on the VAX.
5:41 p.m.
Still, an RZ28 would be a better choice for a 4GB drive. I've never even heard of a
RZ74, but I assume it's a full height 5 1/4" model, which translates to more
power, and noise than a RZ28. Moving my PDP-11/73 in a BA123 from full height 5 1/4"
drives to 3.5"x1" drives made a large difference in the amount of noise it
makes, in addition to cutting down on the amount of power that it pulls.
Zane
Fred may be talking about the RA74 (contrasts with the
RZ74) here. -jea
RA's go to KDA50's doing SDI
RD's go to RQDX's doing MFM/RLL
RF's go to KFQSA's doing DSSI
RZ's go to KZQSA's doing SCSI
I believe some list members have attached the four disk types all to
a system at once and have succeeded, using a wide QBus cabinet.
--
--
| Zane H. Healy | UNIX Systems Administrator |
| healyzh(a)aracnet.com (primary) | OpenVMS Enthusiast |
| | Classic Computer Collector |
+----------------------------------+----------------------------+
| Empire of the Petal Throne and Traveller Role Playing, |
| PDP-10 Emulation and Zane's Computer Museum. |
| http://www.aracnet.com/~healyzh/ |
> I wanted to revive my MicroVax II (BA23
cabinet I think) and add
> RZ74 (4GB drive) to it. I am writing number from memory, perhaps
> I have made mistakes. Will this card on Ebay do the trick?
>
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2775848822&categ…
rd=1
> I believe this might be the easiest way to
get SCSI support
> on my machine, but perhaps this card is incompatible, or
> drive is too big?
> Uhm... be *very* careful with connecting these drives, and the
> KDA50 controllers, to the BA23 power supply. Most of these
> will *not* be able to handle them together, since the KDA50
> controller (SDI to QBus) is a power-hungry monster.
> Other than that, the drive would work just fine on the VAX.
6 Jan
6 Jan
4:21 a.m.
On Mon, 5 Jan 2004, Zane H. Healy wrote:
>Fred may be talking about the RA74 (contrasts with
the RZ74) here. -jea
OOps, sorry, yes.
The RZ74 is actually the HDA of an RF74 (DSSI), but with SCSI based
electronics- I have several of them. DEC probably wanted to sell
all their leftover DSSI HDA's before doing new ones, in the transition
period from DSSI to SCSI. Also, doing it that way probably was good
to cut on production cost: one HDA, two target groups of customers..
So, um, the RZ74 is a 3.5GB (not 4GB) SCSI disk, 5.25", full height
(still power-hungry ;-) drive. Its fairly fast, but also makes a
shitload of noise, so dont put it in a livingroom system :)
And indeed, the RZ28 (2GB) or RZ29 (4GB) drives are much better
choices, and will last you longer, too, as they are much newer
(usually based on Seagate's HAWK or Barracuda drives.)
--f
4:30 a.m.
On Mon, 5 Jan 2004, John Allain wrote:
RA's go to KDA50's doing SDI
MSCP
controller.
RD's go to RQDX's doing MFM/RLL
MSCP
controller.
RF's go to KFQSA's doing DSSI
MSCP
controller.
RZ's go to KZQSA's doing SCSI
Dunno,
or(T)MSCP.
So, yes, you can use all of these in a single system, if
you have enough addresses and vectors for the controllers
and are able to tell the OS what those addresses are- the
OS still uses a single device driver for all of them.
(perhaps not for the KZQSA, see other msg)
--f
7608
days inactive
7609
days old
8 comments
6 participants
participants (6)
-
allain＠panix.com -
fire＠dls.net -
healyzh＠aracnet.com -
jhfinexgs2＠compsys.to -
jkunz＠unixag-kl.fh-kl.de -
waltje＠pdp11.nl