RE: HMC automatic power on after failure?

All true, but consider:

If the HMC comes back up on its own, now what? Do you want the POWER system
to come up to standby mode? Do you want partitions to autostart too? If
they autostart from a hard shutdown, is there processing that needs to
resynch replication, rebuild access paths, look for damaged objects, etc?
If the partitions just come up, and software fails for any of a myriad of
reasons, how long will it take to repair that vs. waiting the extra hour to
bring it up manually? All questions that have to be answered and for some
shops it is simple, get it all restarted as fast as possible. For other
shops it's a bit more complicated, iASPs, replication (did it failover
automatically?) communications etc.

My point is sometimes the manual recovery is better and allowing the
autonomic systems to do their thing is not the best choice. Each shop has
to analyze that and be sure it's right. As any times as we do that analysis
for customers, we get different answers based on the application suite and
operational requirements.


--
Jim Oberholtzer
Agile Technology Architects

-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of
Roberto José Etcheverry Romero
Sent: Wednesday, September 27, 2017 10:02 AM
To: Midrange Systems Technical Discussion
Subject: Re: HMC automatic power on after failure?

Just like with any other SystemX machine, you just set the bios to either
"last state" which means if it was powered on, power on, otherwise stay off,
or "power on", which makes it power on each time the power is back on.
There is no setting on the HMC to control this (afaik) since it's a bios
setting. I guess you could set it with the ASU utility but that would mean
having the IMM configured on the network (the equivalent to the ASMI
interface).
Anyways, you can set it to autostart, but it's done from the BIOS/UEFI
screen.

Roberto

On Wed, Sep 27, 2017 at 11:56 AM, Christopher Bipes <
chris.bipes@xxxxxxxxxxxxxxx> wrote:

Found this link to the HMC best practice PDF
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&;
cd=5&cad=rja&uact=8&ved=0ahUKEwj0ndLXzsXWAhXBJJQKHfJpA
xsQFgg9MAQ&url=https%3A%2F%2Fwww-304.ibm.com%2Fwebapp%
2Fset2%2Fsas%2Ff%2Fbest%2Fhmc_best_practices.pdf&usg=
AFQjCNFFjcJgGWb3Cwg4KCDfGKXQCJJ9YA

Section 4 - Security

Unattended start mode can be set in BIOS to allow the HMC to reboot
without the power-on password following restoration of power after an
unplanned outage. However, the keyboard and mouse at the local console
will remain locked until the power-on password is entered.


Chris Bipes
Director of Information Services
CrossCheck, Inc.


-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of
David Gibbs
Sent: Wednesday, September 27, 2017 7:39 AM
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
Subject: HMC automatic power on after failure?

Folks:

As I've mentioned in the past ... I'm not a hardware guy.

With that said ... how does the HMC respond when power is restored
after a failure?

We've got a scheduled power outage this weekend and will be powering
down all the partitions on the system Friday evening ... if we power
off the HMC, will it automatically boot up when power is restored?

If we leave the HMC powered on (and let it go down when the UPS is
exhausted), will it automatically boot up when power is restored (I
know some PC's have the ability to reboot or remain off after a power
loss based on BIOS setting).

Is there a setting in the HMC to control the power state upon restoration?

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