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

[John P. Linderman]

The best I could find googling *fujitsu super eagle "glue"* was

Introduction to redundant arrays of inexpensive disks ... - IEEE Xplore
https://ieeexplore.ieee.org/iel2/231/7454/00301912.pdf
<https://ieeexplore.ieee.org/iel2/231/7454/00301912.pdf>
by DA Patterson - ‎1989 - ‎Cited by 324
<https://scholar.google.com/scholar?biw=1544&bih=764&um=1&ie=UTF-8&lr&cites=11507519054000724161>
-
‎Related articles
<https://scholar.google.com/scholar?biw=1544&bih=764&um=1&ie=UTF-8&lr&q=related:wZjAM5zrsp8u3M:scholar.google.com/>
computers, the Fujitsu M2361A "Super Eagle" disk for minicomputers, .....
assembly, with this gluedissolving after the disks had been in the field
for 18 months.

Tantalizing, but I couldn't dig further, perhaps because I'm not a member
of IEEE.

On Tue, Jul 2, 2019 at 5:34 PM Rico Pajarola <rp at servium.ch> wrote:

> if you still have that story, I'd love to hear it. A quick search didn't
> turn up anything except that Super Eagles is a Nigerian football team.
>
>
> On Tue, Jul 2, 2019 at 12:59 PM John P. Linderman <jpl.jpl at gmail.com>
> wrote:
>
>> I don't have authoritative info on the cause, I'm just repeating what I
>> heard. A highly viscous substance like glue would explain why it took so
>> long to fail. In any event, it was nasty. Worked perfectly long enough to
>> build confidence, then failed spectacularly. It was widespread. I entered a
>> "Sysadmin Horror Story" contest at a USENIX (San Diego?), and won with a
>> "short story" entry: *Supereagles*. I still have the shark's tooth
>> trophy.
>>
>> On Tue, Jul 2, 2019 at 9:41 AM Tim Wilkinson <tjw at twsoft.co.uk> wrote:
>>
>>>
>>>
>>> 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> 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.
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>>>
>>>
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>>>
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