24 Feb
2003
24 Feb
'03
5:35 a.m.
--- Mail List
<mail.list(a)analog-and-digital-solutions.com> wrote:
I like the Webster WQESD/4 controller, it's got some really sweet
capabilities (such as having hard partitions that you can use to boot RT-11
Pick up a Sigma SCD-RQD11/EC when it shows up on
eBay
for around $35 to $50 ( or even less these days? )...
Are end-user docs for these sorts of controllers available? I wouldn't
mind getting a Qbus (or Unibus!) ESDI controller (I have a few drives
out of old external Sun SCSI<->ESDI enclosures) but would want one that
isn't impossible to configure.
My primary OSes would be 2BSD, possibly RSX-11 or RSTS, and maybe
even VMS (on an 11/750 or uVAX-II). In the case of 2BSD, I'd want
a controller that responds to the xp driver, IIRC.
Anyone out there have favorites? from different partitions). I'm not sure about
2BSD, but it should support
everything else you list. I've used it with drives
out of old external Sun
SCSI<->ESDI enclosures. The downside with ESDI controllers is that the
drives are getting hard to find, and I assume they're starting to develope
reliability problems.
Here is the manual for that board:
ftp://zane.brouhaha.com/pub/hardware/WQESD.pdf
Still, I've since switched to Viking SCSI adapters for my PDP-11/23+,
PDP-11/44, and PDP-11/73. They're able to support 4mm DAT, CD-ROM, and
small, quiet, lower power SCSI HD's. Oh, the WQESD's will also provide a
DU bootstrap (and I think others) for the PDP-11, until I got a quad-height
/73 board, it's only purpose in my /73 was to provide the bootstrap (with
the console on a DLV11J). One of these days I might convert the /23+ to a
/73 that way.
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/ |