I am very fond of Intech's SpeedTools Test Suite (www.speedtools.com) It's only $25, but you may well have a CD of it lying around; is often bundled with external drives. Definitely, if you can, install the OS onto the striped array. Doubling your disk access throughput on a disk-intensive system is a Good Thing. > From: John Niven <senseamp at yahoo.com> > Date: Tue, 3 Oct 2006 07:50:23 -0700 (PDT) > Subject: [G4] G4 APG upgrades? > > So the G4 now has OS 10.3.9 on one drive, two drives > are striped together (one from each channel) and the > other drive is spare. > > Thus the first question: what do you think of this > arrangement? Is there any software I can download that > will measure the disk access performance