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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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