Re: Fwd: Linux reference on subs

[mnolin]

 It would be interesting to see how the Linux systems have performed

 after 2.5 years at sea.

I've never been able to forget the Navy's previous disasters with adrift surface ships, and non Unix upgrades. 

"US vessel, the Yorktown" .."The entire network of Windows NT machines crashed. The
Navy claims the ship was dead in the water for about three hours;"
http://www.ganssle.com/articles/Asgoodasitgets.htm

http://www.wired.com/science/discoveries/news/1998/07/13987
 
2.5 years at see in the submarine fleet, sounds very successful, overall. I would expect the Navy would be 
working on a performance report. 

Michael Nolin


On Mon Jun  6 22:28 , Joshua Judson Rosen  sent:

"Jon \"maddog\" Hall" mad...@li.org writes:



 On Sun, 2011-06-05 at 07:24 -0400, Jeffry Smith wrote:

  

  http://www.nashuatelegraph.com/archive/331544-196/uss-new-hampshire-surfaces-on-seacoast.html

  

  quote:

  "The $2.4 billion New Hampshire is so high-tech that it has no

  periscope, and uses Linux-based computers to provide deck officers

  with views of the outside world from various external cameras, using

  multiple parts of the spectrum."



 It was not until I read the comments to the article and saw that they

 were posted two years ago that I realized the article was written in

 October of 2008.

 

 It would be interesting to see how the Linux systems have performed

 after 2.5 years at sea.



If anyone finds out..., the article in Wikipedia is pretty

scant on details:



http://en.wikipedia.org/wiki/USS_New_Hampshire_\(SSN-778)



-- 

"Don't be afraid to ask (λf.((λx.xx) (λr.f(rr."



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Re: Fwd: Linux reference on subs

[Benjamin Scott]

On Thu, Jun 9, 2011 at 9:23 AM,  mno...@embedded-unlimited.com wrote:
 US vessel, the Yorktown  ..The entire network of Windows NT machines
 crashed. The Navy claims the ship was dead in the water for about three
 hours;

  There's not much real information on this, but supposedly the
problem was in userland code: A divide by zero error crashed the
database that supported the ship systems.  Doesn't sound like an OS
issue.

  Franky, I wouldn't want to trust my life to anything running on any
general-purpose OS or software, be it Linux, Unix, Microsoft, Plan 9,
whatever.  I'd like something with known, documented, well-understood,
finite, deterministic states and transitions, please.  Preferably
implemented in discrete controls with manual alternatives.

  I think it was the estimable Bill Sconce who had a shirt that summed
it up nicely: As a programmer, I find your faith in computers
amusing.

-- Ben

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Re: Fwd: Linux reference on subs

[Joshua Judson Rosen]

Benjamin Scott dragonh...@gmail.com writes:

 On Thu, Jun 9, 2011 at 9:23 AM,  mno...@embedded-unlimited.com wrote:
  US vessel, the Yorktown  ..The entire network of Windows NT machines
  crashed. The Navy claims the ship was dead in the water for about three
  hours;
 
   There's not much real information on this, but supposedly the
 problem was in userland code: A divide by zero error crashed the
 database that supported the ship systems.  Doesn't sound like an OS
 issue.
 
   Franky, I wouldn't want to trust my life to anything running on any
 general-purpose OS or software, be it Linux, Unix, Microsoft, Plan 9,
 whatever.  I'd like something with known, documented, well-understood,
 finite, deterministic states and transitions, please.  Preferably
 implemented in discrete controls with manual alternatives.

FYI, Wikipedia says the the (Linux-based) USS New Hampshire's
oxygen-generator failed, two months ago; cites Reuters:


http://www.reuters.com/article/2011/03/21/us-unitedtechnologies-submarine-idUSTRE72K7U420110321

Not clear what OS, if any, was running the generator.

Dead in the water describes a whole other prospect there, though

   I think it was the estimable Bill Sconce who had a shirt that summed
 it up nicely: As a programmer, I find your faith in computers
 amusing.

Yes. And..., um..., I'll forgo the opportunity to expand on that,
for the time being :)

I'll just say, `I like my science peer-reviewed, please'.

-- 
Don't be afraid to ask (λf.((λx.xx) (λr.f(rr.

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Re: Fwd: Linux reference on subs

[Jon maddog Hall]

On Sun, 2011-06-05 at 07:24 -0400, Jeffry Smith wrote:
 bounced for some reason -
 
 jeff
 
 
 -- Forwarded message --
 From: Jeffry Smith jsm...@alum.mit.edu
 Date: Sat, Jun 4, 2011 at 7:39 PM
 Subject: Linux reference on subs
 To: Greater New Hampshire LUG gnh...@gnhlug.org
 
 
 http://www.nashuatelegraph.com/archive/331544-196/uss-new-hampshire-surfaces-on-seacoast.html
 
 quote:
 The $2.4 billion New Hampshire is so high-tech that it has no
 periscope, and uses Linux-based computers to provide deck officers
 with views of the outside world from various external cameras, using
 multiple parts of the spectrum.
 ___
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 http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/
 
It was not until I read the comments to the article and saw that they
were posted two years ago that I realized the article was written in
October of 2008.

It would be interesting to see how the Linux systems have performed
after 2.5 years at sea.

md

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Re: Fwd: Linux reference on subs

[Joshua Judson Rosen]

Jon \maddog\ Hall mad...@li.org writes:

 On Sun, 2011-06-05 at 07:24 -0400, Jeffry Smith wrote:
  
  http://www.nashuatelegraph.com/archive/331544-196/uss-new-hampshire-surfaces-on-seacoast.html
  
  quote:
  The $2.4 billion New Hampshire is so high-tech that it has no
  periscope, and uses Linux-based computers to provide deck officers
  with views of the outside world from various external cameras, using
  multiple parts of the spectrum.

 It was not until I read the comments to the article and saw that they
 were posted two years ago that I realized the article was written in
 October of 2008.
 
 It would be interesting to see how the Linux systems have performed
 after 2.5 years at sea.

If anyone finds out..., the article in Wikipedia is pretty
scant on details:

http://en.wikipedia.org/wiki/USS_New_Hampshire_(SSN-778)

-- 
Don't be afraid to ask (λf.((λx.xx) (λr.f(rr.

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Re: Fwd: Linux reference on subs

[Jefferson Kirkland]

Well, you can find out a bit more information by visiting some of the links
in the following page:  http://www.ussnewhampshire.org/

Unfortunately for everyone curious about details, you probably are not going
to find much out about the technology that the Navy doesn't want to release.
 Have served in the Submarine Service, I have first hand experience that
they don't call it The Silent Service for nothing.

The Virginia Class, Seawolf submarines are amazing pieces of technology.  We
learned about them in the last school that I attended in the Navy and have
to say that they are quite unmatched.  Some day that may release more
information, but whatever we find probably won't be to the detail level we
would all like.  Sorry to be the buzz kill. Of course I would love it if I
were proved wrong on that, but am not holding my breath.

Regards,

Jeff

2011/6/6 Jefferson Kirkland numberw...@gmail.com

 Well, you can find out a bit more information by visiting some of the links
 in the following page:  http://www.ussnewhampshire.org/

 Unfortunately for everyone curious about details, you probably are not
 going to find much out about the technology that the Navy doesn't want to
 release.  Have served in the Submarine Service, I have first hand experience
 that they don't call it The Silent Service for nothing.

 The Virginia Class, Seawolf submarines are amazing pieces of technology.
  We learned about them in the last school that I attended in the Navy and
 have to say that they are quite unmatched.  Some day that may release more
 information, but whatever we find probably won't be to the detail level we
 would all like.  Sorry to be the buzz kill. Of course I would love it if I
 were proved wrong on that, but am not holding my breath.

 Regards,

 Jeff



 On Mon, Jun 6, 2011 at 10:28 PM, Joshua Judson Rosen roz...@geekspace.com
  wrote:

 Jon \maddog\ Hall mad...@li.org writes:
 
  On Sun, 2011-06-05 at 07:24 -0400, Jeffry Smith wrote:
  
  
 http://www.nashuatelegraph.com/archive/331544-196/uss-new-hampshire-surfaces-on-seacoast.html
  
   quote:
   The $2.4 billion New Hampshire is so high-tech that it has no
   periscope, and uses Linux-based computers to provide deck officers
   with views of the outside world from various external cameras, using
   multiple parts of the spectrum.
 
  It was not until I read the comments to the article and saw that they
  were posted two years ago that I realized the article was written in
  October of 2008.
 
  It would be interesting to see how the Linux systems have performed
  after 2.5 years at sea.

 If anyone finds out..., the article in Wikipedia is pretty
 scant on details:

http://en.wikipedia.org/wiki/USS_New_Hampshire_(SSN-778)

 --
 Don't be afraid to ask (λf.((λx.xx) (λr.f(rr.

 ___
 gnhlug-discuss mailing list
 gnhlug-discuss@mail.gnhlug.org
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Fwd: Linux reference on subs

[Jeffry Smith]

bounced for some reason -

jeff


-- Forwarded message --
From: Jeffry Smith jsm...@alum.mit.edu
Date: Sat, Jun 4, 2011 at 7:39 PM
Subject: Linux reference on subs
To: Greater New Hampshire LUG gnh...@gnhlug.org


http://www.nashuatelegraph.com/archive/331544-196/uss-new-hampshire-surfaces-on-seacoast.html

quote:
The $2.4 billion New Hampshire is so high-tech that it has no
periscope, and uses Linux-based computers to provide deck officers
with views of the outside world from various external cameras, using
multiple parts of the spectrum.
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