Disk performance figures on PE2650

bscott@ntisys.com bscott at ntisys.com
Wed Mar 26 09:43:00 CST 2003


On Wed, 26 Mar 2003, at 9:03am, ARechenberg at shermanfinancialgroup.com wrote:
> Basic tests (hdparm -t) for 7 disk HW v SW RAID0 (PERC3/QC v Linux RAID)
> show almost a 50% increase in sequential read of 64MB file with SW RAID
> (HW: 98MB/s SW: 138MB/s).

  Keep in mind that artificial benchmarks don't always give realistic
results on an unloaded system.  If the system is busy running an actual
application (like a database), and does not have to spend resources doing
RAID, hardware gives you more of a benefit.  This is especially true after a
disk fails and you're doing a rebuild.

-- 
Ben Scott <bscott at ntisys.com>
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