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  3. February 2011

Re: Cache battery replacement

Jerry,

Yep, that's the panel. On the screen before you press F11 you can also see
lots of current disk stats, though like the WRKSYSSTS and WRKACTJOB
displays, percentages are usually best observed over a period of time v.
instantaneous.

From what you post your system has 2 mirrored drives. Mirroring is active
and both drives are good. If one of your hard drives fails, it's status
will be reflected here as well. Put the cursor in that column & hit F1 for
help on the different possible statuses.

As to the disk controller, I was looking at the system builder and I admit I
was skimming it so I didn't really read anything about the embedded MFIOP.
It more than likely doesn't have any cache.

Just found the problem analysis, repair, and parts manual for your 250:
http://publib.boulder.ibm.com/iseries/v5r1/ic2924/v5r1hwpdf/pdf/y4459653.pdf

On Mon, Feb 21, 2011 at 3:31 PM, Jerry C. Adams <midrange@xxxxxxxx> wrote:

John,

Is this the panel you mentioned regarding WRKDSKSTS F11?

--Protection--
Unit ASP Type Status Compression
1 1 MRR ACTIVE
1 1 MRR ACTIVE

On the WRKHDWRSC *STG here it shows:

Resource name . . . . . . . : DC01
Text . . . . . . . . . . . . : Disk Storage Controller
Type-model . . . . . . . . . : 675A-006
Serial number . . . . . . . : 10-1152012
Part number . . . . . . . . : 0000021P5221

I found the System Builder manual. I'm probably mis-reading, but it looks
like the 2748/2763 are only required if more than 4 disk units are
installed
(expansion unit? We don't have one) or RAID-5 is required. The 675A is a
MFIOP. I'll admit I'm not sure what the manual means here: "The MFIOP
(CCIN
675A) and the processor are combined together on the planar board. It also
includes embedded base disk unit controller. A separate #9728 is not
required. The #2407 includes a #9740 Base RAID Disk Unit Controller. The
MFIOP drives two low-speed slots C08, C09, and two high-speed PCI slots C03
and C07. It supports #2740/#9740, #2741 or #2748 PCI RAID Disk Unit
Controllers only, if there are more than four disk drives, and RAID-5 is
required." Except the part about " also includes embedded base disk unit
controller".

Anyway, nice to know that, when things degrade to a snail's pace, I can use
WRKDSKSTS to see something.

Jerry C. Adams
IBM i Programmer/Analyst
All I know is that we lost the game. What's so historic about that?
-Harvey
Haddix after pitching 12 perfect innings and losing 1-0 in the thirteenth.
--
A&K Wholesale
Murfreesboro, TN
615-867-5070


-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of John Jones
Sent: Monday, February 21, 2011 2:25 PM
To: Midrange Systems Technical Discussion
Subject: Re: Cache battery replacement

2748 disk controllers have 26MB of cache. 2763 controllers have 10MB.
Those are the two controllers I see for Model 250 systems in the System
Builder I have from that era. WRKHDWRSC *STG should show you which
controller you have.

Also, most if not all of the time you can see if the cache batteries are
still good by doing a WRKDSKSTS followed by F11. The Status column
normally
shows "DEGRADED" if the cache batteries have failed and the write cache is
disabled. This doesn't let you predict or anticipate battery failure like
the service tools function, but it does let you confirm that the cache
memory is in fact being used (which it only does if the batteries are
good).

On Mon, Feb 21, 2011 at 12:22 PM, Jerry C. Adams <midrange@xxxxxxxx>
wrote:

Boy, Rob, I never would of thought of going that route. But it did, I
think, tell me something. There was nothing in the Advanced Analysis
list
that remotely looked like it had anything to do with batteries (and I
looked
in some pretty obscure items). So maybe there aren't any cache batteries
in
the 250.

As far as the "old" part goes, I figured that. I still have to maintain
my
previous employer's software and run functions for the auditors (even
after
you close the doors, they're still there!) so I compare things whenever I
have a chance, and STRSST menus are different. I'm pretty sure I'll have
to
live with the old (V5R1 and Model 250) for awhile (sigh).

Jerry C. Adams
IBM i Programmer/Analyst
I know Koufax's weakness. He can't hit. - Whitey Ford
--
A&K Wholesale
Murfreesboro, TN
615-867-5070


-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of rob@xxxxxxxxx
Sent: Monday, February 21, 2011 11:54 AM
To: Midrange Systems Technical Discussion
Subject: RE: Cache battery replacement

On old unsupported hardware which will not have some new ptf's to allow
you to see it at the command line, nor the cache battery option in SST
there is another SST option
STRSST
1. Start a service tool
4. Display/Alter/Dump
1. Display/Alter storage
2. Licensed Internal Code (LIC) data
14. Advanced analysis
1=Select BATTERYINFO
Options . . . . . -list -all
But that really doesn't tell you jack
Concurrently Can
Be
Resource Serial Type Frame Card Maintainable
Safely

Name Number Model ID Position Battery Pack
Replaced
DC09 YL1088121002 57B7-001 3C00 C9 Yes No

You miss all the date information.




http://ibmsystemsmag.blogs.com/i_can/2010/07/i-can-display-the-status-of-you
r-ioa-cache-batteries.html


Rob Berendt
--
Group Dekko
Dept 1600
Mail to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com





From: "Jerry C. Adams" <midrange@xxxxxxxx>
To: "'Midrange Systems Technical Discussion'"
<midrange-l@xxxxxxxxxxxx>
Date: 02/21/2011 11:46 AM
Subject: RE: Cache battery replacement
Sent by: midrange-l-bounces@xxxxxxxxxxxx



Good advice. Had a cache battery die on a Model 720 and it took me all
day
to figure out why things had ground to a snail's pace. The Model 520
actually gave out a shout when it wanted its diaper changed.

The new employer has a Model 250 (running V5R1). I don't know if it has
a
cache battery or not (though I suspect that it does). SST doesn't show
an
option '9' and I couldn't find anything about cache batteries in any of
the
other options, though I could have missed it or misinterpreted it.

Seems I'm wrong guessing that there is cache on the 250. The System
Handbook shows 0 for L2 Cache. But, then, the Handbook only shows 6818
model disk units (17.54 gig) whereas ours has 6717 units (8+ gig).

Jerry C. Adams
IBM i Programmer/Analyst
When we played, World Series checks meant something. Now all they do is
screw up your taxes. -Don Drysdale
--
A&K Wholesale
Murfreesboro, TN
615-867-5070

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of rob@xxxxxxxxx
Sent: Monday, February 21, 2011 8:43 AM
To: midrange-l@xxxxxxxxxxxx
Subject: Cache battery replacement

I strongly suggest checking your cache batteries on a regular basis and
when the time to warning gets down to 45 days or so, calling IBM and
ordering it then. Mine have been backordered a while and I am still
waiting on a replacement.

STRSST
1. Start a service tool
7. Hardware service manager
9. Work with resources containing cache battery packs
5=Display battery information

Resource name . . . . . . . . . . . : DC09
Serial number . . . . . . . . . . . : YL1088121002
Actual type-model . . . . . . . . . : 57B7-001
Unit ID . . . . . . . . . . . . . . : U789C.001.DQD0P72
Planar ID . . . . . . . . . . . . . : P1
Card . . . . . . . . . . . . . . . : C9
Battery type . . . . . . . . . . . : Lithium Ion (LiIon)
Battery state . . . . . . . . . . . : No battery warning/error
Power-on time (days) . . . . . . . :
Adjusted power-on time (days) . . . :
Estimated time to warning (days) . :
Estimated time to error (days) . . :

Apparently some batteries are harder to get ahold of than others. At
least that's what he said when I called him and he said he was just
finishing a battery replacement somewhere else and I asked him where was
mine. He still doesn't have an ETA from his parts depot.

Rob Berendt
--
Group Dekko
Dept 1600
Mail to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com

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--
JJ
4 Out of 3 people have trouble with fractions.
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