Date: Sun, 24 Mar 2002 15:48:30 -0800 From: Terry Lambert <tlambert2@mindspring.com> To: Robert Watson <rwatson@freebsd.org> Cc: Willie Viljoen <will@laserfence.net>, freebsd-fs@freebsd.org, freebsd-bugs@freebsd.org Subject: Re: Soft update instability with heavy IO and offboard IDE controller Message-ID: <3C9E65CE.5278B5C6@mindspring.com> References: <Pine.NEB.3.96L.1020324092025.47668V-100000@fledge.watson.org>
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Robert Watson wrote: > > The drive lies about commiting data to stable storage. This blows away > > all the hard work soft updates does trying to ensure ordering. > > Yes, but that failure is only exposed to the operating system if the drive > fails to actually write the data, which to my understanding, occurs only > when there is a power loss to the drive. It depends on when the lie is perpetrated by the hardware. > I have to say that my answer on the ATA write caching is a UPS. :-) 8-). -- Terry To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-fs" in the body of the message
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