" a practice called "short-stroking". The outside edge will 
read and write at around double the speed of the inner-most edge, so if 
you only use the outer half of the drives (which represents around 2/3 
of the capacity) , you can increase the average performance of each 
drive by about 20%-25%."

You are correct ... The UNIX world has been doing this for years ... in AIX
UNIX I can directly map a portion of the drive to the outer, middle, or
inner spaces on the disk.

" RAID 50, though I'm pretty sure that it 
should perform better in optimal condition and 8-10+ drives than RAID 
0+1 unless you are hitting the limits of the RAID card's processor."

RAID 0+1 has shown me over the years to have a very low hit on the RAID
card's processor and a better usage of the RAID card's RAM vs. other RAID
levels.   As such I've always stayed with RAID 1 or RAID 1+0 on all my
servers. 

Christopher Checca
Packard Transport, Inc.
IT Department
24021 South Municipal Dr
PO Box 380
Channahon, IL.  60410
815 467 9260
815 467 6939 Fax
[EMAIL PROTECTED]
www.packardtransport.com


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