July 13, 2005 The below parameters will effect disk ...

July 13, 2005




The below parameters will effect disk performance, therefore, any deviation from
Sonnet's exact setup may result in discrepancies in performance.

Sonnet's Test Setup:

Hardware:
1. Disk drives - Western Digital Raptor WD740 10,000 RPM 74 GB or Seagate
Barracuda 7200.8 7,200 RPM 400 GB
2. Cables - Sonnet Tempo eSATA Data Cables
3. Computer - Power Mac G5 dual 2.0 GHz (June 2003 introduction) or Power Mac
G4 dual 1.0 GHz (Mirrored Drive Door)
4. RAM - 512 MB

Software:
1. Benchmark program - disktester (http://www.diglloyd.com/diglloyd/software/index.html)
exact command "./disktester run-sequential-suite RAID"
exact command "./disktester run-sequential-suite -s 64 -t 2048 RAID"
exact command "./disktester run-area-test -T 131072 -t 2048 RAID"
notes: a) name of volume to be tested was "RAID"
b) "-t 2048" is for the one drive benchmark run
change "-t 2048" to "-t 4096" for a two drive striped array
change "-t 2048" to "-t 8192" for a four drive striped array
change "-t 2048" to "-t 16384" for a eight drive striped array
2. Using or bypassing Mac OS X file system cache - disktester default is to bypass
the Mac OS X file system cache to most accurately test actual disk performance
3. Empty, erased file system - always done before each benchmark run
4. Mac OS X version - 10.4
5. Striping software – Apple’s Disk Utility

Operations:
1. Transfer size of request- benchmarks display the ...