Use AIX raw volumes.

Orville L. Lantto
Datatrend Technologies, Inc.  (http://www.datatrend.com)
IBM Premier Business Partner
121 Cheshire Lane, Suite 700
Minnetonka, MN 55305
Email: Orville.Lantto AT datatrend DOT com

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Karel Bos <Karel.Bos AT NUON DOT COM>
Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
02/19/2004 10:45 AM
Please respond to "ADSM: Dist Stor Manager"
 
        To:     ADSM-L AT VM.MARIST DOT EDU
        cc: 
        Subject:        Re: Dsmfmt on cx600 any thoughts?


I would create and format the volumes from within TSM. This will speed
things up!

Regard,

Karel

-----Oorspronkelijk bericht-----
Van: Amar Vi [mailto:Vibhute_Bandu AT EMC DOT COM]
Verzonden: donderdag 19 februari 2004 17:25
Aan: ADSM-L AT VM.MARIST DOT EDU
Onderwerp: Dsmfmt on cx600 any thoughts?


Greetings,
 
We have serious performance issue for dsmfmt command.
 
We are getting 45MB/sec write speed on AIX4.3.3 box connected to CX600 ATA
RAID5 4+1 disk group.But when we use dsmfmt it gives 9 to 16 MB/sec. Which
is very sluggish to format 16 TB storage for storage pools.
 
Does anybody have information on how dsmfmt works?
 
 or how to speed up so that it will give better I/O on SAN storage?
 
Thank you,

Bandu Vibhute

Technology Solutions Group 

EMC² 

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