Date: Thu, 11 Apr 1996 22:02:11 +0200 (MET DST) From: Luigi Rizzo <luigi@labinfo.iet.unipi.it> To: bde@zeta.org.au (Bruce Evans) Cc: toor@dyson.iquest.net, bde@zeta.org.au, dutchman@spase.nl, freebsd-hackers@FreeBSD.org, se@zpr.uni-koeln.de Subject: Re: HDD cpu usage (IDE vs. SCSI). Message-ID: <199604112002.WAA15511@labinfo.iet.unipi.it> In-Reply-To: <199604111957.FAA04906@godzilla.zeta.org.au> from "Bruce Evans" at Apr 12, 96 05:57:28 am
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> >Also, how comes that a 2X CDROM has such a low speed ? > > Perhaps the drive doesn't buffer it. > > >> SCSI 2.2X CDROM > >> Command overhead is 5655 usec (time_4096 = 9033, time_8192 = 12410) > >> transfer speed is 1.21281e+06 bytes/sec > >> Command overhead is 5670 usec (time_4096 = 9046, time_8192 = 12422) > >> transfer speed is 1.21324e+06 bytes/sec > > It's 14 times faster than mine :-]: WHoops... I read that as 121KB/s instead of 1.2MB/s ... sorry for the confusion! Luigi ==================================================================== Luigi Rizzo Dip. di Ingegneria dell'Informazione email: luigi@iet.unipi.it Universita' di Pisa tel: +39-50-568533 via Diotisalvi 2, 56126 PISA (Italy) fax: +39-50-568522 http://www.iet.unipi.it/~luigi/ ====================================================================
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