Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!tut.cis.ohio-state.edu!pt.cs.cmu.edu!andrew.cmu.edu!hf07+ From: hf07+@andrew.cmu.edu (Howard Haruo Fukuda) Newsgroups: comp.sys.mac.hardware Subject: Re: Opinions on La Cie hard disks?? Message-ID: Date: 3 Mar 90 02:14:29 GMT References: <90053.120147AKB101@psuvm.psu.edu>, <11220001@hpccc.HP.COM> , Organization: Class of '90, Carnegie Mellon, Pittsburgh, PA Lines: 24 In-Reply-To: In article jwg1@gte.com (James W. Gish) writes: >Is there a performance difference between the ProDrive series and the >ProDrive LPS series? I've noticed some sellers of the Quantum drives >in MacWeek say that the drives have a seek time of 12ms. La Cie says >19ms, or 15ms with their optimization package(?). Are they all selling >the same drives and just using different numbers/measuring different >things, or are they selling different drives? The average access time to physically move the read/write heads of the Quantum ProDrive Series is 19ms, 17ms for the ProDrive LPS (or so I heard), and 15ms for the ProDrive 120/170/200. One of the things that makes Quantums so fast is that they have a 64KByte disk cache which lowers the average access time to retreive data. Quantum's estimates for the effect of the cache is average access times of 12ms for the ProDrive series, <12ms (11?) for the ProDrive LPS, and 10ms for the ProDrive 120/170/200. Depending on who's advertising the drive you may see either set of numbes, like 12ms or 19ms for a 105mb ProDrive. It is the same drive, different marketing. -Howard Internet: hf07+@andrew.cmu.edu