Date: Tue, 13 Mar 2001 10:38:36 -0800 From: "Kevin Oberman" <oberman@es.net> To: "Justin T. Gibbs" <gibbs@scsiguy.com> Cc: Alfred Perlstein <bright@wintelcom.net>, stable@freebsd.org, Soren Schmidt <sos@freebsd.dk>, scsi@freebsd.org Subject: Re: Disk I/O problem in 4.3-BETA Message-ID: <200103131838.f2DIcas00336@ptavv.es.net> In-Reply-To: Your message of "Mon, 12 Mar 2001 15:23:22 MST." <200103122223.f2CMNMs39959@aslan.scsiguy.com>
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Thanks to everyone. I had no idea what an interesting thread I was spawning with my original question. Since I now understand just how dangerous running BOTH WC and SOFTUPDATES can be, I have rebuilt my kernel with WC disabled and, for a reasonably fast backup, where WC is not a data integrity issue, I have a special kernel with WC enabled. I'll just live with the slow-down in things unless smarter folks figure a way to make write cache work safely. Sometimes speed is not everything. When I brought up my first FreeBSD system I had a bad memory card which caused several crashes and hopelessly corrupted my disk. This was no big thing as I had a virgin install and it was easy to just re-install after replacing the bad RAM. But I'd find that to be a real pain today. (And I DO have a good backup today.) R. Kevin Oberman, Network Engineer Energy Sciences Network (ESnet) Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab) E-mail: oberman@es.net Phone: +1 510 486-8634 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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