Date: Mon, 12 Mar 2001 21:13:29 -0600 From: David Kelly <dkelly@hiwaay.net> To: Alfred Perlstein <bright@wintelcom.net> Cc: Kevin Oberman <oberman@es.net>, Soren Schmidt <sos@freebsd.dk>, mobile@FreeBSD.ORG, stable@FreeBSD.ORG Subject: Re: Disk I/O problem in 4.3-BETA Message-ID: <200103130313.f2D3DTe08249@grumpy.dyndns.org> In-Reply-To: Message from Alfred Perlstein <bright@wintelcom.net> of "Mon, 12 Mar 2001 17:14:59 PST." <20010312171459.P18351@fw.wintelcom.net>
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Alfred Perlstein writes: > * David Kelly <dkelly@hiwaay.net> [010312 16:48] wrote: > > > The FreeBSD kernel has a built in daemon called syncer. It sounds like > > a natural place to periodically issue a sync command to such storage > > devices. Assuming such a command exists. > > This won't work. The syncer exists to: [...] > The problem is that you still have the writecaching going on > so the ordering can get messed up. Thanks for the excellent reply. Sitting here thinking, "Duh. I knew that. Why didn't I remember that before sending?" Maybe I can blame it on the low level sinus headache which has made me grumpy all day. > > My "purchased because they threw in a USB Zip-100 and ATA-100 PCI card" > > 45G Maxtor is awfully impressive. 32000 blocks of 128k staring 8G from > > the begining of the disk resulted in over 30MB/sec according to dd. I'm > > stunned. Kernel from mid-Feb. > > > > :P showoff... :) Altho the thread is on writing the above was the read speed. Well, yes and no. Partialy its an atta-boy for Soren. After all, "everybody knows SCSI is the only serious storage media" yet Soren made the ATA stuff scream. I still boot SCSI on this machine because I always have. But no longer fret when budget doesn't allow for SCSI on something at work. Now if I really wanted to brag I'd tell you I got the HD and zip drive from Staples in December for a total of $180 (plus tax). Had to pay $53.90 for the ATA-100 card but my $50 rebate arrived today. :-) -- David Kelly N4HHE, dkelly@hiwaay.net ===================================================================== The human mind ordinarily operates at only ten percent of its capacity -- the rest is overhead for the operating system. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-mobile" in the body of the message
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