Re: Balancing disk drives -- MIDRANGE-L

That process is going to act more like the initial install than the post balance as Larry explained earlier.

The best procedure would be to start over. Drain the drive, remove it from the configuration and re-add it with the balance option right away...., or ..... Just wait a week the system will do what it does best.

10% is well within a reasonable busy rate even if it is a bit higher than the other drives. If it were 40% I'd be concerned.

Jim Oberholtzer
Chief Technical Architect
Agile Technology Architects

On 7/29/2011 8:30 AM, rob@xxxxxxxxx wrote:

My concern about the *ENDALC and *MOVDTA is that, once you add the drive
back in, wouldn't you have the same problem? It would start putting new
writes back on the new drive.

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: Charles Wilt <charles.wilt@xxxxxxxxx> To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx> Date: 07/29/2011 09:13 AM Subject: Re: Balancing disk drives Sent by: midrange-l-bounces@xxxxxxxxxxxx http://www-912.ibm.com/s_dir/slkbase.NSF/0/80a0c71876d5a872862567ca00770cb0?OpenDocument Q: I have run TRCASPBAL and STRASPBAL *USAGE; however, my busy disk drives are still busy. Why? A: TRCASPBAL *USAGE will only move cold (unused) data. Hot (frequently used) data is not moved by this option. If you have enough available space in the ASP, you may wish to try draining the drive (STRASPBAL *ENDALC and STRASPBAL *MOVDTA) to see if it alleviates the problem. You may also want to try using iDoctor to trace the disk access to determine which objects are being access and why which jobs/programs to help determine another course of action. HTH, Charles On Fri, Jul 29, 2011 at 8:05 AM, <rob@xxxxxxxxx> wrote:
> The rebalance is finished. I am NOT impressed.
>
> 07/28/11
> 09:57:37 - TRCASPBAL SET(*ON) ASP(1) TIMLMT(300)
> 09:58:36 - ASP tracing successfully started for ASP 1.
> 14:59:03 - ASP tracing for ASP 1 ended.
> 15:04:33 - STRASPBAL TYPE(*USAGE) ASP(1) TIMLMT(*NOMAX)
> 15:04:47 - ASP balancing successfully started for ASP 1.
> 18:20:26 - ASP balancing for ASP 1 ended.
>
> 07/29/11
> 07:47:46 - WRKDSKSTS
>
> Size % %
> Unit Type (M) Used Busy
> ...
> 14 433D 243252 73.7 8
> 15 433D 243252 73.8 12
> 16 433D 243252 73.8 16
> 17 433D 243252 73.8 9
> 18 433D 243252 73.8 10
> 19 433D 243252 73.8 15
> 20 433D 283794 71.9 100
>
>
>
>
> 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:rob@xxxxxxxxx
> To:midrange-l@xxxxxxxxxxxx
> Date: 07/28/2011 04:07 PM
> Subject: Balancing disk drives
> Sent by:midrange-l-bounces@xxxxxxxxxxxx
>
>
>
> After the earlier add of a disk with the option to add unit and balance
> data I decided to wait a day. Then I ran TRCASPBAL. When that was done

I

>
> fired off a STRASPBAL, this time with TYPE(*USAGE) instead of *CAPACITY
> (used by Add units and balance data). Apparently it's moving a lot

around

>
> from that one busy disk. The rebalance is still running...
>
> Size % %
> Unit Type (M) Used Busy
> ...
> 14 433D 243252 74.1 1
> 15 433D 243252 74.1 1
> 16 433D 243252 74.1 3
> 17 433D 243252 74.1 1
> 18 433D 243252 74.1 1
> 19 433D 243252 74.1 1
> 20 433D 283794 72.2 60
>
>
> 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