17 Jan
2002
17 Jan
'02
5:22 a.m.
-----Original Message-----
From: Merle K. Peirce [mailto:at258@osfn.org]
We seem to have a surfeit of Decwriters. Would anyone
be
interested in one?
Interested, yes -- those are teletypes, right? ... but how big are they? I certainly
can't make it to RI right now to pick one up. :) (really too bad...)
Regards,
Chris
Christopher Smith, Perl Developer
Amdocs - Champaign, IL
/usr/bin/perl -e '
print((~"\x95\xc4\xe3"^"Just Another Perl
Hacker.")."\x08!\n");
'
17 Jan
17 Jan
5:46 a.m.
They are 100 pounds or so. Yes they are very like teletypes. If you
want, we might be able to hold one, or you could go for a IV which is
about the size of a typewriter.
On Thu, 17 Jan 2002, Christopher Smith wrote:
M. K. Peirce
Rhode Island Computer Museum, Inc.
Shady Lea, Rhode Island
"Casta est quam nemo rogavit."
- Ovid
-----Original
Message-----
From: Merle K. Peirce [mailto:at258@osfn.org]
We seem to have a surfeit of Decwriters. Would
anyone be
interested in one?
Interested, yes -- those are teletypes, right? ... but how big are they? I certainly
can't make it to RI right now to pick one up. :) (really too bad...)
Regards,
Chris
Christopher Smith, Perl Developer
Amdocs - Champaign, IL
/usr/bin/perl -e '
print((~"\x95\xc4\xe3"^"Just Another Perl
Hacker.")."\x08!\n");
'
6:12 a.m.
As teletypes were ugly the decwriter was elegant.... Both noisy but in
different ways....
George Rachor
=========================================================
George L. Rachor Jr. george(a)rachors.com
Hillsboro, Oregon http://rachors.com
United States of America Amateur Radio : KD7DCX
On Thu, 17 Jan 2002, Merle K. Peirce wrote:
They are 100 pounds or so. Yes they are very like
teletypes. If you
want, we might be able to hold one, or you could go for a IV which is
about the size of a typewriter.
On Thu, 17 Jan 2002, Christopher Smith wrote:
M. K. Peirce
Rhode Island Computer Museum, Inc.
Shady Lea, Rhode Island
"Casta est quam nemo rogavit."
- Ovid
-----Original Message-----
From: Merle K. Peirce [mailto:at258@osfn.org]
We seem to have a surfeit of Decwriters. Would
anyone be
interested in one?
Interested, yes -- those are teletypes, right? ... but how big are they? I certainly
can't make it to RI right now to pick one up. :) (really too bad...)
Regards,
Chris
Christopher Smith, Perl Developer
Amdocs - Champaign, IL
/usr/bin/perl -e '
print((~"\x95\xc4\xe3"^"Just Another Perl
Hacker.")."\x08!\n");
'
7 a.m.
New subject: OT: SCA-2 <=> SE adapter solutions??
I've recently stumbled onto a source of new conveniently-sized SCSI drives
with the SCA-2 connector. I'm considering installing them in a couple of
applications in my home setup, including an SDI RAID that presently uses
NARROW drives, and would need an adapter for each drive and that adapter
should fit into its canister. Another application is with a WIDE (68-pin,
single-ended) controller I've been using.
Has any of you had experience with this sort of thing to such extent that
you'd care to recommend a specific adapter for the first application, and an
adapter/terminator for the second?
thanks,
Dick
7:32 a.m.
New subject: OT: SCA-2 <=> SE adapter solutions??
should fit into its canister. Another application is
with a WIDE (68-pin,
single-ended) controller I've been using.
I've got a 9GB LVD drive with a SCA connector in my DEC PWS 433au by
converting it down to 68-pin with one of these adapters and setting the
jumpers on the drive to SE. Works great.
Has any of you had experience with this sort of thing
to such extent that
you'd care to recommend a specific adapter for the first application, and an
adapter/terminator for the second?
I'd say take a look at some place like http://www.scsistuff.com I'm sure
there are others, but that's the only one I know off the top of my head
(I've not ordered from them though). I bought my converter at a local
electronics parts store and payed about twice what I should have. It's
pretty basic, and you can also get ones that convert down to Narrow. I
wouldn't worry to much about the manufacturer for this.
I'm not sure why you're worried about a terminator, but if you can't set
termination on the drive, you should be able to get a terminator that you
can clip onto the ribbon cable in one of the spots where you'd normally
plug a drive.
Zane
--
| 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/ |
7:55 a.m.
New subject: OT: SCA-2 <=> SE adapter solutions??
I am not sure if anyone has mentioned this site:
http://www.eableseast.com
I did a search awile ago for 80-pin adaptors, and at $15 each, they were the
cheapest I could find.
Bryan
P.S. I only found this site awhile ago. I haven't bought anything from them
yet...
should fit into its canister. Another application
is with a WIDE (68-pin,
single-ended) controller I've been using.
I've got a 9GB LVD drive with a SCA connector in my DEC PWS 433au by
converting it down to 68-pin with one of these adapters and setting the
jumpers on the drive to SE. Works great.
Has any of you had experience with this sort of
thing to such extent that
you'd care to recommend a specific adapter for the first application, and an
adapter/terminator for the second?
I'd say take a look at some place like http://www.scsistuff.com I'm sure
there are others, but that's the only one I know off the top of my head
(I've not ordered from them though). I bought my converter at a local
electronics parts store and payed about twice what I should have. It's
pretty basic, and you can also get ones that convert down to Narrow. I
wouldn't worry to much about the manufacturer for this.
I'm not sure why you're worried about a terminator, but if you can't set
termination on the drive, you should be able to get a terminator that you
can clip onto the ribbon cable in one of the spots where you'd normally
plug a drive.
8:10 a.m.
New subject: OT: SCA-2 <=> SE adapter solutions??
I am not sure if anyone has mentioned this site:
http://www.eableseast.com
!ACK! sorry... that should be http://www.cableseast.com
I did a search awile ago for 80-pin adaptors, and at $15 each, they were the
cheapest I could find.
Bryan
P.S. I only found this site awhile ago. I haven't bought anything from them
yet...
should fit into its canister. Another application
is with a WIDE (68-pin,
single-ended) controller I've been using.
I've got a 9GB LVD drive with a SCA connector in my DEC PWS 433au by
converting it down to 68-pin with one of these adapters and setting the
jumpers on the drive to SE. Works great.
Has any of you had experience with this sort of
thing to such extent that
you'd care to recommend a specific adapter for the first application, and an
adapter/terminator for the second?
I'd say take a look at some place like http://www.scsistuff.com I'm sure
there are others, but that's the only one I know off the top of my head
(I've not ordered from them though). I bought my converter at a local
electronics parts store and payed about twice what I should have. It's
pretty basic, and you can also get ones that convert down to Narrow. I
wouldn't worry to much about the manufacturer for this.
I'm not sure why you're worried about a terminator, but if you can't set
termination on the drive, you should be able to get a terminator that you
can clip onto the ribbon cable in one of the spots where you'd normally
plug a drive.
8:26 a.m.
New subject: OT: SCA-2 <=> SE adapter solutions??
That SCSISTUFF site that was mentioned before has adapters as low as $6, and
those might well fit, but terminating the upper data and parity lines requires
the adapter be larger, and I'm concerned that it will not fit in the
canisters. They don't list any mechanical spec's.
My concern is mainly for integrating these drives into the RAID, where I have
few options as to how things are hooked up. IN a PC, I just put a terminator
on the upper data and parity lines and am done, but since I've not yet tried
out this scheme in the case of the narrow channel in the RAID, I'm reluctant
to bo out and buy a half dozen adapters only to find they don't work for me.
Dick
----- Original Message -----
From: "Bryan Pope" <bpope(a)wordstock.com>
To: <classiccmp(a)classiccmp.org>
Sent: Thursday, January 17, 2002 12:10 PM
Subject: Re: OT: SCA-2 <=> SE adapter solutions??
the
I am not sure if anyone has mentioned this site:
http://www.eableseast.com
!ACK! sorry... that should be http://www.cableseast.com
>
> I did a search awile ago for 80-pin adaptors, and at $15 each, they were > cheapest I could find.
>
> Bryan
>
> P.S. I only found this site awhile ago. I haven't bought anything from
them
> yet...
>
>
> >
> > >should fit into its canister. Another application is with a WIDE
(68-pin,
> > >single-ended) controller I've been
using.
> >
> > I've got a 9GB LVD drive with a SCA connector in my DEC PWS 433au by
> > converting it down to 68-pin with one of these adapters and setting the
> > jumpers on the drive to SE. Works great.
> >
> > >Has any of you had experience with this sort of thing to such extent
that
> > >you'd care to recommend a specific
adapter for the first application,
and an
> > >adapter/terminator for the second?
> >
> > I'd say take a look at some place like http://www.scsistuff.com I'm
sure
> > there are others, but that's the only one I know off the top of my head
> > (I've not ordered from them though). I bought my converter at a local
> > electronics parts store and payed about twice what I should have. It's
> > pretty basic, and you can also get ones that convert down to Narrow. I
> > wouldn't worry to much about the manufacturer for this.
> >
> > I'm not sure why you're worried about a terminator, but if you
can't set
> > termination on the drive, you should be able to get a terminator that
you
can clip onto the ribbon cable in one of the spots
where you'd normally
plug a drive.
9:44 a.m.
New subject: SCA-2 <=> SE adapter solutions??
Rich,
Does your source have a large quantity that everyone on the list who's
interested can also purchase, or is this a small stash you've found for
yourself???
Curt
----- Original Message -----
From: "Richard Erlacher" <edick(a)idcomm.com>
To: <classiccmp(a)classiccmp.org>
Sent: Thursday, January 17, 2002 1:00 PM
Subject: OT: SCA-2 <=> SE adapter solutions??
I've recently stumbled onto a source of new
conveniently-sized SCSI drives
with the SCA-2 connector. I'm considering installing them in a couple of
applications in my home setup, including an SDI RAID that presently uses
NARROW drives, and would need an adapter for each drive and that adapter
should fit into its canister. Another application is with a WIDE (68-pin,
single-ended) controller I've been using.
Has any of you had experience with this sort of thing to such extent that
you'd care to recommend a specific adapter for the first application, and
an
adapter/terminator for the second?
thanks,
Dick
12:48 p.m.
New subject: SCA-2 <=> SE adapter solutions??
The $6 adapters from SCA-80 to WIDE SCSI is at <scsistuff.com>, IIRC. I hope
they have enough so you guys don't buy 'em all.
Dick
----- Original Message -----
From: "Curt Vendel" <curt(a)atari-history.com>
To: <classiccmp(a)classiccmp.org>
Sent: Thursday, January 17, 2002 1:44 PM
Subject: Re: SCA-2 <=> SE adapter solutions??
Rich,
Does your source have a large quantity that everyone on the list who's
interested can also purchase, or is this a small stash you've found for
yourself???
Curt
----- Original Message -----
From: "Richard Erlacher" <edick(a)idcomm.com>
To: <classiccmp(a)classiccmp.org>
Sent: Thursday, January 17, 2002 1:00 PM
Subject: OT: SCA-2 <=> SE adapter solutions??
I've recently stumbled onto a source of new
conveniently-sized SCSI drives
with the SCA-2 connector. I'm considering installing them in a couple of
applications in my home setup, including an SDI RAID that presently uses
NARROW drives, and would need an adapter for each drive and that adapter
should fit into its canister. Another application is with a WIDE (68-pin,
single-ended) controller I've been using.
Has any of you had experience with this sort of thing to such extent that
you'd care to recommend a specific adapter for the first application, and
an
adapter/terminator for the second?
thanks,
Dick
9:56 a.m.
New subject: OT: SCA-2 <=> SE adapter solutions??
On Thu, 17 Jan 2002, Richard Erlacher wrote:
I've recently stumbled onto a source of new
conveniently-sized SCSI drives
with the SCA-2 connector. I'm considering installing them in a couple of
applications in my home setup, including an SDI RAID that presently uses
NARROW drives, and would need an adapter for each drive and that adapter
should fit into its canister. Another application is with a WIDE (68-pin,
single-ended) controller I've been using.
I've never used SCA drives on a narrow bus, so I can't speak to that t
all.
I have used SCA LVD drives on wide LVD chains, and finding an adapter
that honors the LVD is a pain in the butt. 80-pin-to-68-pin LVD
adapters run as high as $45 each. And the $45 ones don't work. The drive
reports as SE.
We finally found some adapters by A-Excite that work, at a price,
IIRC, of $12.95 each. Maybe $19.95.... Haven't found a local dealer,
so we had to order 6. They work reliably, and I can't see much, if any,
difference in performance between an IBM 80Mb-LVD 68-pin drive and an
IBM 80Mb-LVD SCA drive with adapter.
All in all, I'm not buying any more 80-pin drives, unless I'm putting
them on a hot-swap bus. They're a big pain in the butt if you move your
drives around much, which I do. If you're going to install them, test
them, and glue the case shut, the savings may be worth the hassle.
Doc
12:57 p.m.
New subject: OT: SCA-2 <=> SE adapter solutions??
The writeup I have on the drives in question suggests that there's a jumper
option to disable the differential signalling in favor of single ended
signalling. It also has a jumper to limit the data width to 8-bits.
I'm loath to pay the ridiculous prices some outfits charge for these adapters,
but if you want to see an SCA80<=>68-pin WIDE adapter for $6, visit
www.scsistuff.com.
Right now, I'm looking for a multi-drive backplane, and will bend some
sheetmetal to fit it so I can simply swap drives, since I like that notion.
I'm presently examining the possibility of modifying the type of swappable
trays I presently use on all my PC's for this purpose. Of course it will be
tricky getting the adapter to fit into the tray.
It seems silly, however true it may be, that a new 10GB SCA drive should cost
less than an adapter to the 50/68-pin SCSI cable.
Dick
----- Original Message -----
From: "Doc" <doc(a)mdrconsult.com>
To: <classiccmp(a)classiccmp.org>
Sent: Thursday, January 17, 2002 1:56 PM
Subject: Re: OT: SCA-2 <=> SE adapter solutions??
On Thu, 17 Jan 2002, Richard Erlacher wrote:
I've recently stumbled onto a source of new
conveniently-sized SCSI drives
with the SCA-2 connector. I'm considering installing them in a couple of
applications in my home setup, including an SDI RAID that presently uses
NARROW drives, and would need an adapter for each drive and that adapter
should fit into its canister. Another application is with a WIDE (68-pin,
single-ended) controller I've been using.
I've never used SCA drives on a narrow bus, so I can't speak to that t
all.
I have used SCA LVD drives on wide LVD chains, and finding an adapter
that honors the LVD is a pain in the butt. 80-pin-to-68-pin LVD
adapters run as high as $45 each. And the $45 ones don't work. The drive
reports as SE.
We finally found some adapters by A-Excite that work, at a price,
IIRC, of $12.95 each. Maybe $19.95.... Haven't found a local dealer,
so we had to order 6. They work reliably, and I can't see much, if any,
difference in performance between an IBM 80Mb-LVD 68-pin drive and an
IBM 80Mb-LVD SCA drive with adapter.
All in all, I'm not buying any more 80-pin drives, unless I'm putting
them on a hot-swap bus. They're a big pain in the butt if you move your
drives around much, which I do. If you're going to install them, test
them, and glue the case shut, the savings may be worth the hassle.
Doc
9:58 a.m.
New subject: OT: SCA-2 <=> SE adapter solutions??
I meant to add that the A-Excite adapters I mentioned are easily
identified. They have a 10mm x 10mm piece of Velcro on the 80-pin side.
Doc
8219
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12 comments
8 participants
participants (8)
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at258＠osfn.org -
bpope＠wordstock.com -
csmith＠amdocs.com -
curt＠atari-history.com -
doc＠mdrconsult.com -
edick＠idcomm.com -
george＠racsys.rt.rain.com -
healyzh＠aracnet.com