[COFF] Disk Technology was [Simh] Which PDP-11 to choose

[Tim Wilkinson]

Interesting that it was the platter bonding. The explanation SI gave us (They sold us the super Eagles along with their controller) was that it was a lubricant. So I had assumed a bearing seal fail.

 

Anyway after about 4 swap outs and a lot of lifting they lasted a further 15 years until we knocked down the office with the original 750 and its big brother an 8810 still in the computer room as all the resellers wanted certificates of continuing maintenance that would have cost more than they were willing to pay for those vaxs.

 

From: John P. Linderman [mailto:jpl.jpl at gmail.com] 
Sent: 02 July 2019 12:47
To: Larry McVoy <lm at mcvoy.com>
Cc: Clem Cole <clemc at ccc.com>; Patrick Finnegan <pat at computer-refuge.org>; COFF <coff at minnie.tuhs.org>; Tim Wilkinson <tjw at twsoft.co.uk>
Subject: Re: [COFF] Disk Technology was [Simh] Which PDP-11 to choose

 

There were eagles, and then there were super-eagles. Our experience with eagles was great, and we were eager to try the (larger) super-eagles. We soaked them for a month or so, then put them into production use. Whereupon, they started dropping like flies. It turns out the glue they used to attach the platters to the spindle slowly crept out over time, eventually coming to grief with a read/write head. This experience was wide-spread, and seriously damaged Fujitsu's reputation.

 

On Mon, Jul 1, 2019 at 10:11 AM Larry McVoy <lm at mcvoy.com <mailto:lm at mcvoy.com> > wrote:

On Mon, Jul 01, 2019 at 09:49:42AM -0400, Clem Cole wrote:
>  An Eagle or Eagle-II was a whole lot lighter (and physically smaller) than
> an RP06 or RP07 (or an RM series drive for that matter). It is interesting
> to hear you had problems with the Eagles.   They were generally considered
> the best/most reliable of the day.   The SI controller on the Vax was less
> so, although many of us in the UNIX community used them.

We ran Eagles on the Masscomps we had at Geophysics.  Nothing but good
things to say about those drives.
_______________________________________________
COFF mailing list
COFF at minnie.tuhs.org <mailto:COFF at minnie.tuhs.org> 
https://minnie.tuhs.org/cgi-bin/mailman/listinfo/coff



---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://minnie.tuhs.org/pipermail/coff/attachments/20190702/19e9f8c8/attachment.html>