Re: DASD arm worksheets

Have you looked at IBM'sWorkload Estimator? It is a sizing tool available to 
you at

http://www-912.ibm.com/estimator

See what you get and let us know if it helps.

Vern

-------------- Original message -------------- 
From: Larry Bolhuis <lbolhuis@xxxxxxxxxx> 

> Kendall speaks the truth. The old worksheets were at a point of just not 
> being able to cover the variety of cabinets, buses, drives, RAID cards, 
> protection type, processors, and other factors. And of course LPAR 
> complicated them as well. 
> 
> So do the IO Math and you'll have a system that can do the work. 
> 
> - Larry 
> 
> Kendall Kinnear wrote: 
> > IBM has changed to a I/O per second calculation for sizing disk on the 
> > newer 
> models. The way I do it is to collect performance data to determine the 
> current 
> average I/Os per second. I then add a growth factor and multiply that by the 
> number of drives on the system. I then divide that number by the number of 
> I/Os 
> per second the new disk subsystem can support per drive. That can be anywhere 
> from 40 to 60 depending on how conservative you want to be. This will give an 
> estimate of the number of drives to propose. 
> > 
> > Kendall Kinnear 
> > Consulting System i5 Architect 
> > Stonebridge 
> > 
> > Phone: 214-676-3146 
> > email: kendall.kinnear@xxxxxxxx 
> > 
> > Sent from Windows Mobile 5 
> > 
> -- 
> Larry Bolhuis IBM eServer Certified Systems Expert: 
> Vice President iSeries Technical Solutions V5R3 
> Arbor Solutions, Inc. iSeries LPAR Technical Solutions V5R3 
> 1345 Monroe NW Suite 259 iSeries Linux Technical Solutions V5R3 
> Grand Rapids, MI 49505 iSeries Windows Integration Technical Solutions V5R3 
> IBM eServer Certified Systems Specialist 
> (616) 451-2500 iSeries System Administrator for OS/400 V5R3 
> (616) 451-2571 - Fax AS/400 RPG IV Developer 
> (616) 260-4746 - Cell iSeries System Command Operations V5R2 
> 
> If you can read this, thank a teacher....and since it's in English, 
> thank a soldier. 
> 
> 
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