Re: cache battery expiration

[broehmer@xxxxxxxxxxxxxxx]

Whats not understood is:
1. Did the CE replace the battery pack.  (assume yes)
2. Did the battery stay separated from the card for at least 2 minutes. 
(?)
3. Does the card require a Start IOA or does it reset itself when 
separated for 2 min. (?)
4. Would it hurt do a Start IOA. (This is not something I would want to do 
unless I could get IBM to say it would work). 

Again, I've only done this a dozen times with no issues so Larry should 
know about the specifics (hopefully). 





From:   Jerry Draper <midrangel@xxxxxxxxxxxxx>
To:     Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
Date:   12/12/2013 03:53 PM
Subject:        Re: cache battery expiration
Sent by:        midrange-l-bounces@xxxxxxxxxxxx



Again then back to my original question.

Is the timer reset when the IOA detects that the battery pack was 
removed for 15sec/2min or is the timer reset manually by the CE?

Jerry

PS:  Slightly unrelated but......in order for a 720 to "sense" that a 
UPS cable has been plugged into the back of the machine all AC power 
must be removed from the machine fro at least three minutes.

J

On 12/12/2013 1:18 PM, broehmer@xxxxxxxxxxxxxxx wrote:
> I can't even think about arguing with that.  2 min. seems like best
> practice to me.  The IBM document I looked
> at said at least 15 seconds but it's from the v5r2 infocenter document 
for
> 2748 to 5708 cards.
>
> Note: When replacing the cache battery pack, the battery must be
> disconnected for at least 15 seconds before connecting the new battery.
> This is the minimum amount of time needed for the card to recognize that
> the battery has been replaced.
>
>
>
>
>
>
>
>
> From:   DrFranken <midrange@xxxxxxxxxxxx>
> To:     Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
> Date:   12/12/2013 03:07 PM
> Subject:        Re: cache battery expiration
> Sent by:        midrange-l-bounces@xxxxxxxxxxxx
>
>
>
> I have a document .... somewhere ..... that says 2 minutes. As far as I
> recall it was for all batteries.  The IOA needs to see that there is no
> battery attached. I do know if I follow the 2 minute rule I've never
> been burned. :-)
>
>           - Larry "DrFranken" Bolhuis
>
> www.frankeni.com
> www.iDevCloud.com
> www.iInTheCloud.com
>
> On 12/12/2013 3:42 PM, broehmer@xxxxxxxxxxxxxxx wrote:
>
> > Larry, I'm curious.
> > Where did you get the 2 minute requisite power off?
> > Everything I read seem to say 15 seconds.  Is that
> > something new or only for 520's?
> > I thought once the start IOA was done it would reset.
> > Again, learning something new and want to know.
> >
> > Thanks
> >
> >
> > "CONFIDENTIALITY NOTICE:  This e-mail transmission (and/or the
> attachments accompanying it) contain confidential information belonging 
to
> the sender.  The information is intended only for the use of the 
intended
> recipient.  If you are not the intended recipient, you are hereby 
notified
> that any disclosure, copying, distribution or the taking of any action 
in
> reliance on the contents of the information is strictly prohibited.  Any
> unauthorized interception of this transmission is illegal under the law.
> If you have received this transmission in error, please promptly notify
> the sender by reply e-mail, and then destroy all copies of the
> transmission."
> >