Date: Sun, 8 Oct 1995 00:35:34 +0100 From: se@zpr.uni-koeln.de (Stefan Esser) To: "Kenneth D. Merry" <ken@rflab1.gtri.gatech.edu> Cc: hackers@freebsd.org Subject: Re: VLB Disk Controllers Message-ID: <199510072335.AA14520@Sysiphos> In-Reply-To: "Kenneth D. Merry" <ken@rflab1.gtri.gatech.edu> "Re: VLB Disk Controllers" (Oct 7, 19:13)
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On Oct 7, 19:13, "Kenneth D. Merry" wrote: } Subject: Re: VLB Disk Controllers } Adaptec 2842 on a i486DX4/100 VLB (QUANTUM XP34300) (Atlas, fast disk) } output for disklatency /dev/rsd0: } Command overhead is 567 usec (time_4096 = 1002, time_8192 = 1438) } transfer speed is 9.40748e+06 bytes/sec Well, you beat me, though not by much :) But then, you used a DX4/100 ... Something I just noticed is the big difference in results I get using /dev/rsd0 vs. /dev/rsd0a: # disklatency /dev/rsd0 Command overhead is 719 usec (time_4096 = 1198, time_8192 = 1677) transfer speed is 8.55617e+06 bytes/sec # disklatency /dev/rsd0a Command overhead is 807 usec (time_4096 = 1272, time_8192 = 1738) transfer speed is 8.80588e+06 bytes/sec Any ideas ??? STefan -- Stefan Esser, Zentrum fuer Paralleles Rechnen Tel: +49 221 4706021 Universitaet zu Koeln, Weyertal 80, 50931 Koeln FAX: +49 221 4705160 ============================================================================== http://www.zpr.uni-koeln.de/staff/esser/esser.html <se@ZPR.Uni-Koeln.DE>
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