Date: Mon, 12 Mar 2001 13:46:21 -0800 From: "Kevin Oberman" <oberman@es.net> To: Soren Schmidt <sos@freebsd.dk> Cc: mobile@FreeBSD.ORG, stable@FreeBSD.ORG Subject: Re: Disk I/O problem in 4.3-BETA Message-ID: <200103122146.f2CLkLs08952@ptavv.es.net> In-Reply-To: Your message of "Mon, 12 Mar 2001 21:36:27 %2B0100." <200103122036.VAA99695@freebsd.dk>
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Soren, Thanks for the quick reply! And right on the button, too. I have turned the write cache back on (any relevance to "write cache" being abbreviated to "WC"? :-) and the time to dd the slices went back to 10 and 5 minutes (actually 489 and 287 seconds). How serious is the possible corruption issue, anyway. The loss in performance is pretty drastic although it may be that dd is an especially bad case, but I really don't like to corrupt my disks, either. Is there hope for a sysctl interface to ATA that would make it possible to switch this sort of thing without rebuilding the kernel? 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-mobile" in the body of the message
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