----------------------------------------------------------------------------------
@MSGID: 2@mail.neurotica.com>
eee1ebc7
@REPLY: 3@news.misty.com> 4a4c7993
@REPLYADDR Dave McGuire <mcguire@lssmuseum.org>
@REPLYTO 2:5075/128 Dave McGuire
@CHRS: CP866 2
@RFC: 1 0
@RFC-Message-ID:
2@mail.neurotica.com>
@RFC-References:
<76a1f909-6624-4c35-bcc1-7f542d18f80en@googlegroups.com> 2@news.misty.com> 1@mail.neurotica.com>
3@news.misty.com>
@TZUTC: -0400
@PID: Mozilla/5.0 (X11; Linux x86_64; rv:102.0)
Gecko/20100101 Thunderbird/102.13.0
@TID: FIDOGATE-5.12-ge4e8b94
On 9/28/23 06:55, Johnny Billquist wrote:
>> Or indeed any Unibus PDP-11. Or any Qbus PDP-11 running directly
>> to SMD
>> with an SMD controller that`s format-compatible, which many are.
>
> Nope. The RM05 supposedly will not work on the RH11. Too slow for the
> disk. RH11 only supported RM02, RP04, RP05 and RP06.
Ahh, I did not know that. Will it actually fail to work, or just not
work very well (overruns/retries)? The distinction matters a lot when
the object is to recover old data from media that nobody else can handle.
> The RM02 was a slowed down RM03 for that specific reason.
Yes.
> As for SMD - not sure. DEC certainly used those OEM drives, but for some
> reason the capacity was always less than the original drive, which makes
> me wonder if DEC did something more funny as well.
We`ll check the print sets when/if someone takes on that project.
But my admittedly decades old memory does recall that a CDC 9766 on an
Emulex controller (possibly an SC03) is media compatible with an RM05.
It`s definitely the case that an Emulex controller (specifically) for
the VAX-11/750, whose model number I`ve forgotten, connected to a CDC
9762 is media-compatible with the RM02. I ran such a configuration at
work in the early 1990s and regularly moved packs between the two.
-Dave
--
Dave McGuire, President/Curator
Large Scale Systems Museum
New Kensington, PA
--- Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101
Thunderbird/102.13.0
* Origin: LSSM (2:5075/128)
SEEN-BY: 5001/100 5005/49 5015/255 5019/40 5020/715
848 1042 4441 12000
SEEN-BY: 5030/49 1081 5075/128
@PATH: 5075/128 5020/1042 4441