Since the 7933/35 topic seems to live on...
The head problem didn't cause disk crashes, but was a problem where the head
cables would become intermittent and finally would lose their connection,
causing read/write problems (if you were writing when the cable quit, you
now had bad data on your disk). That is what prompted the badsectr utility
which was originally written for MPE/V.
The 7933 was released because they couldn't get the seal right in order to
prevent contamination from entering the disk pack when it was changed, so
the door unlock was defeated and it was a 'fixed' pack. Once the seal
problem was fixed, the 7935 was released with the 'door open' switch
operable...
Thanks,
Gary Robillard
-----Original Message-----
From: HP-3000 Systems Discussion [mailto:[log in to unmask]] On Behalf
Of Gilles Schipper
Sent: Thursday, March 06, 2008 11:36 AM
To: [log in to unmask]
Subject: Re: [HP3000-L] HP7933 - Was: newbie question -storing a file from
tape to disk -
If my memory serves me correctly, some time after the 7933 was announced and
became quite popular, HP had a massive "recall" in order to change faulty
heads that were causing disk crashes.
This required CE's to replace the heads on any affected 7933 at the next
opportunuity - usually the next preventative maintenance call.
Now here is where my memory may be a bit fuzzier, but I seem to recall that
around that time, HP announced the 7935, which was exactly the same as the
7933, but was modified to permit the user to replace the disk pack itself.
(Perhaps the 7935 was the original and the 7933 was the one with
user-replaceble disk packs.)
-----------------------------------------------------------------------
-
Gilles Schipper
GSA Inc.
HP System Administration Specialists
300 John Street, Box 87651 Thornhill, ON Canada L3T 7R4
Voice: 905.889.3000 Fax: 905.889.3001
email: [log in to unmask] web: http://www.gsainc.com
-----------------------------------------------------------------------
-
---------- Original Message -----------
From: "Bob J." <[log in to unmask]>
To: [log in to unmask]
Sent: Thu, 6 Mar 2008 13:20:14 -0500
Subject: Re: [HP3000-L] HP7933 - Was: newbie question -storing a file from
tape to disk -
> As we travel down memory lane............
> CEs were supplied a hoist to attempt installing & servicing the upper
> 7933 drives.
> That setup never seemed safe for anybody within 20 feet of the racked
> drives.
> Sleuth was fun for the Series II/III. SleuthSM (simulator) was nice for
the
> HP-IB systems. Those utilities that did the actuator "butterfly" test
> would usually pass
> through the resonant frequency of the drive to make some scary noises.
>
> Bob J. -- Ideal Computer Services
> http://www.icsgroup.net
>
> Jeff Kell wrote:
>
> >>>
> >>
> >>
> >> Does anyone recall the "rack-mounts" for stacking 7933s? Anyone else
> >> ever
> >> "race" 7933s across the DP centre floor by judicious use of adager or
> >> fcopy?
> >
> >
> > 'Sleuth' on a 7920/7925 could produce some very humorous results.
> > Don't recall that utility making it beyond the Series II/IIIs though.
> >
> > Jeff
> >
> > * To join/leave the list, search archives, change list settings, *
> > * etc., please visit http://raven.utc.edu/archives/hp3000-l.html *
> >
> >
>
> * To join/leave the list, search archives, change list settings, *
> * etc., please visit http://raven.utc.edu/archives/hp3000-l.html *
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