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Re: Mystery of chroot



on 7/23/2007 1:57 AM, Gene Heskett wrote:
> On Monday 23 July 2007, Les wrote:
>> On Sun, 2007-07-22 at 22:26 -0700, David Boles wrote:
>>> on 7/22/2007 10:18 PM, Ed Greshko wrote:
>>>> David Boles wrote:
>>>>> on 7/22/2007 9:40 PM, Ed Greshko wrote:
>>>>>> David Boles wrote:
>>>>>>> Really? I have said that I am not a techie only a user of a tool.
>>>>>>>
>>>>>>> Can you name me one personnel computer that would run then, or will
>>>>>>> today, a true Unix OS?
>>>>>> Sorry, I have to ask.  What is "true Unix OS"?  Does Solaris qualify?
>>>>> I am not sure Ed. What I had in my mind was the OS that runs on those
>>>>> really large cabinets in those really cold rooms. I have worked on
>>>>> those. The rooms and the A\C not the computers.
>>>> Well, if you're not sure of what your definition is of "a true Unix OS"
>>>> then a challenge or question as to if a PC will run them kind of loses
>>>> its meaning.
>>>>
>>>> I venture to say that most folks would classify Solaris as a "true Unix
>>>> OS" and yes, they mostly ran on Sparc CPU server systems in rooms with
>>>> false floors and big A/C's.  And yes, in the early days, the workstation
>>>> varieties used Sparc CPU's and not your typical Intel or AMD processor.
>>>>
>>>> But, today Solaris runs just fine on Intel.  So, I would submit that as
>>>> an answer to your question.
>>> Like I said - I was thinking of main frame stuff on big cabinets in really
>>> cold rooms.
>>>
>>> I have never tried Solaris or Sparc. Are they considered what I described
>>> as 'a true Unix'? I was not even aware that they would run in x86 type
>>> equipment.
>>>
>>> I am *not* trying to be a smart *** here. I would like to know.
>> Yes, Solaris is Unix, and runs on x86 and lots of other architectures.
>> As to the big machines in really cold rooms, most modern desktops have
>> more power than the early Unix systems did.  In 1972 a 10Mb disk was
>> huge.  I worked on a 40Mb disk which had air pumps, pnumatic pistons to
>> drive the heads and ran at 3600 RPM with platters that were about 20" in
>> diameter if I remember right.
>>
>> 	Sparc is a kind of processor, it means Sparse instruction set computer.
>> Generally with 32 or so registers, these cpus were capable of very fast
>> operations, and only have 20-50 instructions.  Kind of a hardware
>> implementation of a P-machine for PASCAL.
> 
> Humm, I wonder how the ParalaXx(sp?) 'propeller' would run one of these os's?  
> I'd imagine it has a quite sparse instruction set, but it has 32, 32 bit 
> processors in it, running at about 50mhz each, using microwatts each.  
> Properly harnessed & pipelined, I'd think it could be pretty speedy & its in 
> a 48 or 64 pin dip package!  I'd think the package would make it i/o bound, 
> but I'm just guessing.
> 
>> Regards,
>> Les H


You can only speak to me in English. Geek does not normally work well.  ;-)


-- 

  David

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