Groups > alt.folklore.computers > #153554

Re: very basic tube questions--twin triode, "mu" rating; heptode

From	Charlie Gibbs <cgibbs@kltpzyxm.invalid>
Newsgroups	alt.folklore.computers
Subject	Re: very basic tube questions--twin triode, "mu" rating; heptode
Date	2015-10-29 19:37 +0000
Organization	NewsGuy - Unlimited Usenet $23.95
Message-ID	<n0tshq2v6p@news4.newsguy.com> (permalink)
References	(6 earlier) <n0ojsv$fid$1@dont-email.me> <n0om550122s@news6.newsguy.com> <8Oadnat62O5-q6zLnZ2dnUU7-cWdnZ2d@giganews.com> <9d8e29ea-4492-4f6d-9eb9-32ae0ffd8fb7@googlegroups.com> <x-mdnXAkNImb9K_LnZ2dnUU7-K-dnZ2d@giganews.com>

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On 2015-10-29, Jon Elson <jmelson@wustl.edu> wrote:

> hancock4@bbs.cpcn.com wrote:
>
>> FWIW, we had a 2314 for years, and it served us very well.
>> 
>> Indeed, IBM repackaged the 2314 to be the 2319 and sent it out with early
>> S/370 models.
>> 
>> I did hear of diks heads occasionally crashing, ruining the disk surface
>> and of course the data, but this was rare.  Sites normally backed up their
>> disks at least once a day. However, if a head crash happened say at noon,
>> online data entered that day could be lost unless decent logging was
>> maintained.  Even with good backups, recovery was a real bitch.
> 2314's were pretty reliable.  The blown hydraulic hose was a RARE event, but 
> both places I was at each had it happen ONCE.  It was a truly messy event 
> when it happened, contaminated the whole area with oil mist.

I never saw that happen, although we did have the occasional leak.
Fortunately, they were nothing the drip tray couldn't handle.

> The other problem with that type of drive was cascading head failure.  A 
> pack would not read, so the operator would swap the pack to another drive, 
> that one would also get errors, swap again, and propagate the head/media 
> damage.  It took a lot of training to make sure all operators knew to ALWAYS 
> keep an eye out for this, and stop immediately when errors propagated from 
> one drive to another.  This of course was not a fault with the 2314, you 
> could do this on any removable-pack drive.

And if you had a _really_ determined operator, he would then mount the
backup pack and destroy it too.

-- 
/~\  cgibbs@kltpzyxm.invalid (Charlie Gibbs)
\ /  I'm really at ac.dekanfrus if you read it the right way.
 X   Top-posted messages will probably be ignored.  See RFC1855.
/ \  HTML will DEFINITELY be ignored.  Join the ASCII ribbon campaign!

Thread

very basic tube questions--twin triode, "mu" rating; heptode hancock4@bbs.cpcn.com - 2015-08-25 13:24 -0700
  Re: very basic tube questions--twin triode, "mu" rating; heptode floyd@apaflo.com (Floyd L. Davidson) - 2015-08-25 13:35 -0800
  Re: very basic tube questions--twin triode, "mu" rating; heptode David Wade <dave.g4ugm@gmail.com> - 2015-08-25 23:19 +0100
  Re: very basic tube questions--twin triode, "mu" rating; heptode "Osmium" <r124c4u102@comcast.net> - 2015-08-25 17:36 -0500
  Re: very basic tube questions--twin triode, "mu" rating; heptode "Joe Morris" <j.c.morris@verizon.net> - 2015-08-25 19:41 -0400
    Re: very basic tube questions--twin triode, "mu" rating; heptode tracymnelson@gmail.com - 2015-10-26 09:16 -0700
      Re: very basic tube questions--twin triode, "mu" rating; heptode Quadibloc <jsavard@ecn.ab.ca> - 2015-10-26 09:47 -0700
        Re: very basic tube questions--twin triode, "mu" rating; heptode hancock4@bbs.cpcn.com - 2015-10-26 10:00 -0700
          Re: very basic tube questions--twin triode, "mu" rating; heptode Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-10-26 21:18 +0000
            Re: very basic tube questions--twin triode, "mu" rating; heptode Michael Black <et472@ncf.ca> - 2015-10-26 17:37 -0400
              Re: very basic tube questions--twin triode, "mu" rating; heptode Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-10-27 19:55 +0000
            Re: very basic tube questions--twin triode, "mu" rating; heptode Walter Banks <walter@bytecraft.com> - 2015-10-27 08:31 -0400
            Re: very basic tube questions--twin triode, "mu" rating; heptode "Charles Richmond" <numerist@aquaporin4.com> - 2015-10-27 14:41 -0500
              Re: very basic tube questions--twin triode, "mu" rating; heptode Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-10-27 20:17 +0000
                Re: very basic tube questions--twin triode, "mu" rating; heptode Jon Elson <jmelson@wustl.edu> - 2015-10-28 15:59 -0500
                Re: very basic tube questions--twin triode, "mu" rating; heptode hancock4@bbs.cpcn.com - 2015-10-28 19:01 -0700
                Re: very basic tube questions--twin triode, "mu" rating; heptode Jon Elson <jmelson@wustl.edu> - 2015-10-29 13:46 -0500
                Re: very basic tube questions--twin triode, "mu" rating; heptode Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-10-29 19:37 +0000
          Re: very basic tube questions--twin triode, "mu" rating; heptode Jon Elson <elson@pico-systems.com> - 2015-10-26 21:00 -0500
            Re: very basic tube questions--twin triode, "mu" rating; heptode Quadibloc <jsavard@ecn.ab.ca> - 2015-10-26 19:41 -0700
              Re: very basic tube questions--twin triode, "mu" rating; heptode hancock4@bbs.cpcn.com - 2015-10-27 07:28 -0700
                Re: very basic tube questions--twin triode, "mu" rating; heptode Quadibloc <jsavard@ecn.ab.ca> - 2015-10-27 12:47 -0700
                Re: very basic tube questions--twin triode, "mu" rating; heptode Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-10-27 20:17 +0000
              Re: very basic tube questions--twin triode, "mu" rating; heptode David Wade <dave.g4ugm@gmail.com> - 2015-10-27 23:02 +0000
                Re: very basic tube questions--twin triode, "mu" rating; heptode Ahem A Rivet's Shot <steveo@eircom.net> - 2015-10-28 09:38 +0000
                Re: very basic tube questions--twin triode, "mu" rating; heptode hancock4@bbs.cpcn.com - 2015-10-28 07:47 -0700
                Re: very basic tube questions--twin triode, "mu" rating; heptode Ahem A Rivet's Shot <steveo@eircom.net> - 2015-10-28 19:24 +0000
                Re: very basic tube questions--twin triode, "mu" rating; heptode hancock4@bbs.cpcn.com - 2015-10-28 13:42 -0700
                Re: very basic tube questions--twin triode, "mu" rating; heptode David Wade <dave.g4ugm@gmail.com> - 2015-10-30 15:57 +0000
                Re: very basic tube questions--twin triode, "mu" rating; heptode David Wade <dave.g4ugm@gmail.com> - 2015-10-30 15:54 +0000
                Re: very basic tube questions--twin triode, "mu" rating; heptode Ahem A Rivet's Shot <steveo@eircom.net> - 2015-10-30 18:44 +0000
            Re: very basic tube questions--twin triode, "mu" rating; heptode "Charles Richmond" <numerist@aquaporin4.com> - 2015-10-27 15:19 -0500
              Re: very basic tube questions--twin triode, "mu" rating; heptode Jon Elson <elson@pico-systems.com> - 2015-10-27 18:58 -0500
                Re: very basic tube questions--twin triode, "mu" rating; heptode Quadibloc <jsavard@ecn.ab.ca> - 2015-10-27 17:57 -0700
                Re: very basic tube questions--twin triode, "mu" rating; heptode Quadibloc <jsavard@ecn.ab.ca> - 2015-10-27 17:59 -0700
                Re: very basic tube questions--twin triode, "mu" rating; heptode hancock4@bbs.cpcn.com - 2015-10-27 18:26 -0700
                Re: very basic tube questions--twin triode, "mu" rating; heptode "Charles Richmond" <numerist@aquaporin4.com> - 2015-10-28 14:57 -0500
                Re: very basic tube questions--twin triode, "mu" rating; heptode "Osmium" <r124c4u102@comcast.net> - 2015-10-28 14:09 -0600
                Re: very basic tube questions--twin triode, "mu" rating; heptode Jon Elson <jmelson@wustl.edu> - 2015-10-28 15:52 -0500
                Re: very basic tube questions--twin triode, "mu" rating; heptode Jon Elson <jmelson@wustl.edu> - 2015-10-28 15:46 -0500
                Re: very basic tube questions--twin triode, "mu" rating; heptode Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-10-28 21:09 +0000
                Re: very basic tube questions--twin triode, "mu" rating; heptode Jon Elson <jmelson@wustl.edu> - 2015-10-28 15:38 -0500
                Re: very basic tube questions--twin triode, "mu" rating; heptode Peter Flass <peter_flass@yahoo.com> - 2015-10-28 06:06 -0400
              Re: very basic tube questions--twin triode, "mu" rating; heptode Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-10-28 01:22 +0000
                Re: very basic tube questions--twin triode, "mu" rating; heptode "Charles Richmond" <numerist@aquaporin4.com> - 2015-10-28 15:22 -0500
                Re: very basic tube questions--twin triode, "mu" rating; heptode hancock4@bbs.cpcn.com - 2015-10-28 13:49 -0700
                Re: very basic tube questions--twin triode, "mu" rating; heptode Quadibloc <jsavard@ecn.ab.ca> - 2015-10-28 15:51 -0700
                Re: very basic tube questions--twin triode, "mu" rating; heptode hancock4@bbs.cpcn.com - 2015-10-28 19:28 -0700
                Re: very basic tube questions--twin triode, "mu" rating; heptode Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-10-28 21:34 +0000
                Re: very basic tube questions--twin triode, "mu" rating; heptode Ibmekon <Ibmekon> - 2015-10-28 22:11 +0000
                Re: very basic tube questions--twin triode, "mu" rating; heptode David Wade <dave.g4ugm@gmail.com> - 2015-10-30 15:59 +0000
                Re: very basic tube questions--twin triode, "mu" rating; heptode scott@slp53.sl.home (Scott Lurndal) - 2015-10-30 16:31 +0000
                Re: very basic tube questions--twin triode, "mu" rating; heptode hancock4@bbs.cpcn.com - 2015-10-30 20:07 -0700
                Re: very basic tube questions--twin triode, "mu" rating; heptode "Osmium" <r124c4u102@comcast.net> - 2015-10-31 03:57 -0600
                Re: very basic tube questions--twin triode, "mu" rating; heptode Ahem A Rivet's Shot <steveo@eircom.net> - 2015-10-31 10:20 +0000
                Re: very basic tube questions--twin triode, "mu" rating; heptode "Osmium" <r124c4u102@comcast.net> - 2015-10-31 04:51 -0600
                Re: very basic tube questions--twin triode, "mu" rating; heptode Peter Flass <peter_flass@yahoo.com> - 2015-10-31 07:08 -0400
                Re: very basic tube questions--twin triode, "mu" rating; heptode Ahem A Rivet's Shot <steveo@eircom.net> - 2015-10-31 12:29 +0000
                Re: very basic tube questions--twin triode, "mu" rating; heptode David Hume <David.Hume@example.com> - 2015-10-31 12:04 +0000
                Re: very basic tube questions--twin triode, "mu" rating; heptode "Osmium" <r124c4u102@comcast.net> - 2015-10-31 06:11 -0600
                Re: very basic tube questions--twin triode, "mu" rating; heptode David Hume <David.Hume@example.com> - 2015-10-31 12:37 +0000
                Re: very basic tube questions--twin triode, "mu" rating; heptode Ahem A Rivet's Shot <steveo@eircom.net> - 2015-10-31 13:20 +0000
                Re: very basic tube questions--twin triode, "mu" rating; heptode David Wade <dave.g4ugm@gmail.com> - 2015-11-01 16:18 +0000
                Re: very basic tube questions--twin triode, "mu" rating; heptode "Osmium" <r124c4u102@comcast.net> - 2015-11-01 10:41 -0600
                Re: very basic tube questions--twin triode, "mu" rating; heptode Morten Reistad <first@last.name.invalid> - 2015-10-31 15:21 +0100
                Re: very basic tube questions--twin triode, "mu" rating; heptode "gareth" <no.spam@thank.you.invalid> - 2015-10-31 15:13 +0000
                Re: very basic tube questions--twin triode, "mu" rating; heptode Dave Garland <dave.garland@wizinfo.com> - 2015-10-31 12:49 -0500
                Re: very basic tube questions--twin triode, "mu" rating; heptode "Charles Richmond" <numerist@aquaporin4.com> - 2015-10-31 15:09 -0500
                Re: very basic tube questions--twin triode, "mu" rating; heptode Greymaus <mausg@mail.com> - 2015-11-01 12:04 +0000
                Re: very basic tube questions--twin triode, "mu" rating; heptode "Osmium" <r124c4u102@comcast.net> - 2015-11-01 07:48 -0600
                Re: very basic tube questions--twin triode, "mu" rating; heptode Huge <Huge@nowhere.much.invalid> - 2015-11-01 13:56 +0000
                Re: very basic tube questions--twin triode, "mu" rating; heptode Greymaus <mausg@mail.com> - 2015-11-01 18:33 +0000
                Re: very basic tube questions--twin triode, "mu" rating; heptode Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-11-02 17:17 +0000
                Re: very basic tube questions--twin triode, "mu" rating; heptode Ibmekon <Ibmekon> - 2015-10-31 11:30 +0000
                Re: very basic tube questions--twin triode, "mu" rating; heptode hancock4@bbs.cpcn.com - 2015-10-28 19:15 -0700
                Re: very basic tube questions--twin triode, "mu" rating; heptode Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-10-29 02:55 +0000
                Re: very basic tube questions--twin triode, "mu" rating; heptode hancock4@bbs.cpcn.com - 2015-10-29 07:36 -0700
                Re: very basic tube questions--twin triode, "mu" rating; heptode Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-10-29 17:19 +0000
                Re: very basic tube questions--twin triode, "mu" rating; heptode Lawrence Statton <lawrence@senguio.mx> - 2015-10-29 11:33 -0600
                Re: very basic tube questions--twin triode, "mu" rating; heptode Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-10-29 19:37 +0000
                Re: very basic tube questions--twin triode, "mu" rating; heptode Dave Garland <dave.garland@wizinfo.com> - 2015-10-29 18:03 -0500
                Re: very basic tube questions--twin triode, "mu" rating; heptode "Osmium" <r124c4u102@comcast.net> - 2015-10-29 11:44 -0600
                Re: very basic tube questions--twin triode, "mu" rating; heptode Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-10-29 19:37 +0000
                Re: very basic tube questions--twin triode, "mu" rating; heptode Michael Black <et472@ncf.ca> - 2015-10-29 16:03 -0400
                Re: very basic tube questions--twin triode, "mu" rating; heptode Lawrence Statton <lawrence@senguio.mx> - 2015-10-29 14:15 -0600
                Re: very basic tube questions--twin triode, "mu" rating; heptode Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-10-29 21:51 +0000
                Re: very basic tube questions--twin triode, "mu" rating; heptode Quadibloc <jsavard@ecn.ab.ca> - 2015-10-29 15:20 -0700
                Re: very basic tube questions--twin triode, "mu" rating; heptode Peter Flass <peter_flass@yahoo.com> - 2015-10-30 07:28 -0400
                Re: very basic tube questions--twin triode, "mu" rating; heptode "Charles Richmond" <numerist@aquaporin4.com> - 2015-10-30 14:57 -0500
                Re: very basic tube questions--twin triode, "mu" rating; heptode hancock4@bbs.cpcn.com - 2015-10-29 13:26 -0700
                Re: very basic tube questions--twin triode, "mu" rating; heptode Jon Elson <jmelson@wustl.edu> - 2015-10-29 15:40 -0500
                Re: very basic tube questions--twin triode, "mu" rating; heptode Quadibloc <jsavard@ecn.ab.ca> - 2015-10-29 15:32 -0700
                Re: very basic tube questions--twin triode, "mu" rating; heptode Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-10-29 23:10 +0000
                Re: very basic tube questions--twin triode, "mu" rating; heptode Quadibloc <jsavard@ecn.ab.ca> - 2015-10-29 19:09 -0700
                Re: very basic tube questions--twin triode, "mu" rating; heptode Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-10-30 16:35 +0000
                Re: very basic tube questions--twin triode, "mu" rating; heptode scott@slp53.sl.home (Scott Lurndal) - 2015-10-30 18:35 +0000
                Re: very basic tube questions--twin triode, "mu" rating; heptode Quadibloc <jsavard@ecn.ab.ca> - 2015-10-30 12:05 -0700
                Re: very basic tube questions--twin triode, "mu" rating; heptode Quadibloc <jsavard@ecn.ab.ca> - 2015-10-30 12:22 -0700
                Re: very basic tube questions--twin triode, "mu" rating; heptode scott@slp53.sl.home (Scott Lurndal) - 2015-11-02 14:15 +0000
                Re: very basic tube questions--twin triode, "mu" rating; heptode Walter Banks <walter@bytecraft.com> - 2015-10-30 17:31 -0400
                Re: very basic tube questions--twin triode, "mu" rating; heptode Walter Banks <walter@bytecraft.com> - 2015-10-30 17:44 -0400
                Re: very basic tube questions--twin triode, "mu" rating; heptode Michael Black <et472@ncf.ca> - 2015-10-30 23:38 -0400
                Re: very basic tube questions--twin triode, "mu" rating; heptode "Charles Richmond" <numerist@aquaporin4.com> - 2015-10-31 15:08 -0500
                Re: very basic tube questions--twin triode, "mu" rating; heptode Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-11-02 17:17 +0000
                Re: very basic tube questions--twin triode, "mu" rating; heptode Alfred Falk <falk@arc.ab.ca> - 2015-11-03 16:44 +0000
                Re: very basic tube questions--twin triode, "mu" rating; heptode Jon Elson <jmelson@wustl.edu> - 2015-11-05 15:28 -0600
                Re: very basic tube questions--twin triode, "mu" rating; heptode Walter Banks <walter@bytecraft.com> - 2015-11-05 17:05 -0500
          Re: very basic tube questions--twin triode, "mu" rating; heptode Morten Reistad <first@last.name.invalid> - 2015-10-26 22:12 +0100
  Re: very basic tube questions--twin triode, "mu" rating; heptode hancock4@bbs.cpcn.com - 2015-11-16 18:48 -0800
    Re: very basic tube questions--twin triode, "mu" rating; heptode Chris <xxx.syseng.yyy@gfsys.co.uk> - 2015-11-25 16:00 +0000
      Re: very basic tube questions--twin triode, "mu" rating; heptode hancock4@bbs.cpcn.com - 2015-11-30 09:43 -0800
        Re: very basic tube questions--twin triode, "mu" rating; heptode floyd@apaflo.com (Floyd L. Davidson) - 2015-11-30 10:42 -0900

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