RE: wrkdsksts, disk utilization not balanced out

Are you sure you're not thinking different capacity based on RAID
striping?  That's normal.  For example, units 14, 15, 20, 25.  However,
some things cannot be balanced, such as journal receivers, and if
there's a bunch of them on one or two disks, they'll stay right where
they are and potentially skew the numbers (like the second set of disks
below the first list - that's a separate ASP on another system.  Doing a
STRASPBAL on it does nothing - IBM says normal)

               Size    % 
Unit  Type      (M)  Used
  14  4326    26373   8.0
  15  4326    26373   8.0
  16  4326    30769   8.0
  17  4326    30769   8.0
  18  4326    30769   8.1
  19  4326    30769   8.1
  20  4326    26373   8.0
  21  4326    30769   8.0
  22  4326    30769   8.0
  23  4326    30769   8.0
  24  4326    30769   8.1
  25  4326    26373   8.0
  26  4326    30769   8.0


 61  6714  17548   3.0 
 62  6714  17548   2.9 
 63  6714  13161   4.1 
 64  6714  13161   4.1 
 65  6714  13161    .0 
 66  6714  13161    .0

Justin C. Haase
Solution Manager - Technical Services
Kingland Systems Corporation

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Daniel Ang
Sent: Tuesday, March 13, 2007 8:31 AM
To: Midrange Systems Technical Discussion
Subject: Re: wrkdsksts, disk utilization not balanced out

Hi Pete:

I was told that running straspbal *usage will get the disk usage
statistic
from trcaspbal and spread the data/usage evenly, and if straspbal is not
run
beforehand it will get the last available statistic which would not be
accurate.

Daniel

On 3/13/07, Pete Massiello <pmassiello@xxxxxxxxxxxxxxxx> wrote:

I usually just run STRASPBAL *CAPACITY and never run the TRCASPBAL at

all.

It always balances the disks 100% perfectly.  I can't see why you

would

need to run TRCASPBAL for capacity, but I could for *USAGE.

Pete

---------------------------- Original Message

----------------------------

Subject: wrkdsksts, disk utilization not balanced out
From:    "Daniel Ang" <igsang@xxxxxxxxx>
Date:    Tue, March 13, 2007 5:25 am
To:      Midrange-l@xxxxxxxxxxxx

------------------------------------------------------------------------
--

Hello Guys,

I've a client with i520, whose wrkdsksts shows different disk

capacity

usage
for different disk. i know i can balance it out using TRCASPBAL and

follow

by STRASPBAL *usage.

1) I would like to know what is the normal causes of disk imbalance?

the

system has not IPL since 3 months. and cannot afford any IPL.
2) how long do i need to tun trcaspbal? is it resource hungry? will

it

slow
down my production services?

thanks in advance

regards,
igsang
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