Return to BSD News archive
Path: sserve!newshost.anu.edu.au!munnari.oz.au!sgiblab!cs.uoregon.edu!usenet.ee.pdx.edu!not-for-mail From: erich@cruella.ee.pdx.edu (Erich S. Boleyn) Newsgroups: comp.os.386bsd.misc Subject: FreeBSD FAST SCSI-II performance... Date: 28 Dec 1993 19:10:06 -0800 Lines: 31 Message-ID: <2fqsee$b16@cruella.ee.pdx.edu> NNTP-Posting-Host: cruella.ee.pdx.edu Keywords: synch,scsi2,fast X-Newsreader: NN version 6.5.0 #2 (NOV) Greetings... I have delved through the FAQ and many other postings, but can't yet figure out what's going on (transferring the source to my house will take a while, but I'm going to try that next). Anyway, my question is: What kind of performance should I expect when running the UntraStor 34F LB controller in FAST SCSI-II mode? The system runs reliably, so I don't think it is any kind of motherboard error, but it is just way too slow for FAST & synchronous operation. I have it connected to a Barracuda I FAST SCSI-II hard drive, with the jumpers to initiate synchronous operation (etc.), but when running a simple benchmark, only get throughputs of just under 1 MB/sec (not so hot). Seek times are fast enough, so the drive appears to run really quick, but the overall transfer rate appears to be quite limited. Does FreeBSD just have a slow bufferring method? What's the deal? Thanks for your time. Erich Boleyn -- "I haven't lost my mind; I know exactly where it is." / -- Erich Stefan Boleyn -- \ --=> *Mad Genius wanna-be* <=-- { Honorary Grad. Student (Math) }--> Internet E-mail: <erich@cs.pdx.edu> \ Portland State University / WARNING: INTERESTED AND EXCITABLE