[TUHS] ATT Hardware
John P. Linderman
jpl.jpl at gmail.com
Mon Jul 2 10:55:11 AEST 2018
So prohibiting someone from pushing a button differed in what way from
allowing them to pull a plug? I can understand there may have been some
difference in state when/if the machine was rebooted. If I just wanted the
machine to cease sucking power, what's the difference? I never wanted that
box to exist, or come back to life, in whatever color.
On Sun, Jul 1, 2018 at 8:20 PM, William Corcoran <wlc at jctaylor.com> wrote:
> No! no! no! The 3b2 was one of the first supermicros to fully integrate
> power management with the system. Yanking the cord would be unthinkable
> mainly because it was unnecessary. The shutdown script would remove power
> to the the system once the system safely went down and buffers were
> flushed. You could also depress this massive rocket switch on the side of
> the unit and it would kick off the powerdown script. It is noteworthy that
> the 3b2 power switch was stateless...allowing human and computer to turn
> off the power.
> Finally, the 3b2 is probably the only system in the world with system
> diagnostics so in depth that they were nearly as significant as the
> operating system. It’s a telecommunications thing. Interestingly, the
> color of the 3b2 was similar to a VAX Brown and White.
> On Jul 1, 2018, at 6:24 PM, John P. Linderman <jpl.jpl at gmail.com> wrote:
> Puns aside, anyone who didn't consider pulling the plug was probably not
> someone who should be bringing the system down.
> On Sat, Jun 30, 2018 at 10:17 PM, Greg 'groggy' Lehey <grog at lemis.com>
>> On Saturday, 30 June 2018 at 7:15:07 -0400, Norman Wilson wrote:
>> > Ron Natalie:
>> > My favorite 3B2ism was that the power switch was soft (uncommon then,
>> not so
>> > much now). I seem to recall that if the logged in user wasn't in a
>> > particular group, pushing the power button was a no-op. You didn't
>> > sufficient privs to operate the power.
>> > ====
>> > Surely you mean the current user didn't have sufficent power.
>> Or was experiencing too much resistance?
>> Sent from my desktop computer.
>> Finger grog at lemis.com for PGP public key.
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