Date: Fri, 31 Jan 2003 15:49:32 -0800 From: David Schultz <dschultz@uclink.berkeley.edu> To: Julian Elischer <julian@elischer.org> Cc: Steve Byan <stephen_byan@maxtor.com>, phk@FreeBSD.ORG, freebsd-fs@FreeBSD.ORG, tech-kern@netbsd.org Subject: Re: DEV_B_SIZE Message-ID: <20030131234932.GA16959@HAL9000.homeunix.com> In-Reply-To: <Pine.BSF.4.21.0301311214330.45015-100000@InterJet.elischer.org> References: <20030131192452.GA15985@HAL9000.homeunix.com> <Pine.BSF.4.21.0301311214330.45015-100000@InterJet.elischer.org>
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Thus spake Julian Elischer <julian@elischer.org>: > > contents of the sector are there. I think we would need to > > implement journalling to ensure integrity if hard drives were > > likely to corrupt sectors on power failure. (How often do they do > > this right now, and how often would they with 4K sectors?) > > > in this case teh journel would have to not only include the block being > written, but data on each side of it that may be in teh same 4k. > that implies a read.. If you had to do that, then nearly every write would be a read-modify-write cycle. It would be far less painful to use 4K blocks or larger and align filesystem blocks to disk sectors. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-fs" in the body of the message
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