[Info-vax] Databases versus RMS

[Johnny Billquist]

On 2012-04-21 12:09, John Wallace wrote:
> On Apr 20, 10:11 pm, Jan-Erik Soderholm<jan-erik.soderh... at telia.com>
> wrote:
>> Phillip Helbig---undress to reply wrote 2012-04-20 21:35:
>>
>>
>>
>>> Right.  This is why, in addition to HALT, there are both BOOT and
>>> RESTART options at the console.  These control what happens after a
>>> power cycle.  HALT stays at the console prompt, BOOT boots and RESTART
>>> tries to pick up where it left off, with the assumption that the
>>> contents of memory are still good...
>>
>> I guess that RESTART is a left-over from the "core" days.
>> Core memory keep it's data even without power. :-)
>>
>> Jan-Erik.
>
> Restart in modern context is nothing to do with core (or even battery
> backed) memory. RESTART actually means "see if there's a crash dump in
> memory, and if there is, write the dump before rebooting". I meant to
> post this in context of a discussion a week or two ago but probably
> didn't. Definitive texts include:
> http://h71000.www7.hp.com/doc/83final/ba322_90045/apas02.html which
> says
> "RESTART ... forces the system to attempt to write a crash dump to the
> dump file, and after the dump write completes, the system tries to
> reboot itself automatically."

Not on a VAX it isn't. RESTART really means jump into memory and just 
try to continue where you left off when power was lost.
That's also what the coldstart and warmstart flags in the console 
subsystem is used for.

	Johnny

-- 
Johnny Billquist                  || "I'm on a bus
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