Date: Sun, 8 Oct 1995 00:17:50 +0100 From: se@zpr.uni-koeln.de (Stefan Esser) To: "Justin T. Gibbs" <gibbs@freefall.freebsd.org> Cc: hackers@freebsd.org Subject: Re: VLB Disk Controllers Message-ID: <199510072317.AA12212@Sysiphos> In-Reply-To: "Justin T. Gibbs" <gibbs@freefall.FreeBSD.org> "Re: VLB Disk Controllers" (Oct 7, 15:53)
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On Oct 7, 15:53, "Justin T. Gibbs" wrote: } Subject: Re: VLB Disk Controllers } >IDE: 512/1815890 s + 573 us = 855 us } >NCR: 512/8799540 s + 751 us = 809 us } > } >Seems the NCR is faster on 512 byte transfers. } >Now I guess this is not really a "large i/o" :) } } What drive did you use for your tests? A Quantum XP32150 (2GB Atlas). But I've got values for a more "standard" 0.5GB drive as well (a DEC DSP3053L): Command overhead is 1161 usec (time_4096 = 1666, time_8192 = 2170) transfer speed is 8.12051e+06 bytes/sec (On my 486DX2/66 with NCR 53c810, again ...) 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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