On Tue, Nov 05, 2002 at 10:25:01AM -0500, Luis Hernandez-Garcia wrote: > > Hi, > > We've noticed in our lab that the machines that have IDE hard disks run > their write operations(ie- things that use a lot of swap space) much more > slowly than when we execute the same sort of operations in WIndows machines > (Matlab, for example), and orders of magnitude slower than the machines that > have SCSI drives. The IDE machines grind almost to a halt, whereas the SCSI > ones fly through the operations, and the Windows+IDE machines do just fine. > > I know that SCSI is inherently faster than IDE and the Linux/Unix have been > developed with SCSI in mind. But, isn't there a way to optimize the system > so that it uses the IDE drives more efficiently? Any hints? I, and > everyone around me would sure appreciate them.
Check the drives parameters with hdparm. Perhaps you have DMA disabled. Cheers, -- Javier Gostling Ingeniero de Sistemas Virtualia S.A. [EMAIL PROTECTED] Fono: +56 (2) 202-6264 x 130 Fax: +56 (2) 342-8763 Av. Kennedy 5757, of 1502 Las Condes Santiago Chile
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