Return to BSD News archive
Xref: sserve comp.unix.bsd:7498 comp.os.linux:14847 Newsgroups: comp.unix.bsd,comp.os.linux Path: sserve!manuel.anu.edu.au!munnari.oz.au!sgiblab!sdd.hp.com!cs.utexas.edu!uunet!haven.umd.edu!darwin.sura.net!jvnc.net!nuscc!ntuix!eoahmad From: eoahmad@ntuix.ntu.ac.sg (Othman Ahmad) Subject: IDE faster than SCSI-2 Message-ID: <1992Nov5.080716.10386@ntuix.ntu.ac.sg> Organization: Nanyang Technological University - Singapore X-Newsreader: TIN [version 1.1 PL6] Date: Thu, 5 Nov 1992 08:07:16 GMT Lines: 46 I posted an iozone benchmark using my 386/25Mhz machine which shows that it is slightly slower than a SCSI-2 hard-disk. Now with a 486/33, IDE is definitely faster than a EISA SCSI-2 486/50MHZ hard-disk. Iozone uses normal unix system calls for writing to disks, after all, that is how we write C programs. I may try to run a more sophisticated file system tester called bi? later on. JUlian's machine is a 50MHz EISA 486 with a 1.3GB drive attached via a Bustek 742a SCSI2 adapter. It has 16MB of ram. Part of the disk (about 200MB is taken up by mach2.6 and is unavailable to 386bsd. I checked the load on this machine, it is very light. There is only another user apart from I. iozone 1 Writing the 1 Megabyte file, 'iozone.tmp'...1.766667 seconds Reading the file...1.983333 seconds IOZONE performance measurements: 593534 bytes/second for writing the file 528694 bytes/second for reading the file Running on 486/33 with 256Kbyte RAM cache, maxtor 200Mbyte IDE hard-disk, 8Mbyte main RAM. Whereas the IDE runs XFree86 and open look window manager. I only use 1 megabyte for test file size. IOZONE performance measurements: 873813 bytes/second for writing the file 452623 bytes/second for reading the file Both machine uses 386bsd 0.1 heavily patched, so the timing measurements are consistent with each other. -- Othman bin Ahmad, School of EEE, Nanyang Technological University, Singapore 2263. Internet Email: eoahmad@ntuix.ntu.ac.sg Bitnet Email: eoahmad@ntuvax.bitnet