Date: Fri, 31 Jan 2003 16:13:13 -0800 (PST) From: Julian Elischer <julian@elischer.org> To: David Schultz <dschultz@uclink.berkeley.edu> Cc: Steve Byan <stephen_byan@maxtor.com>, freebsd-fs@FreeBSD.ORG, tech-kern@netbsd.org Subject: Re: DEV_B_SIZE Message-ID: <Pine.BSF.4.21.0301311611190.47169-100000@InterJet.elischer.org> In-Reply-To: <20030131234932.GA16959@HAL9000.homeunix.com>
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On Fri, 31 Jan 2003, David Schultz wrote: > 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. exactly.. But this is a case where "a filesystem using 512 byte blocks would behave significanlty differently with one of these drives" which is what he was asking. > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-fs" in the body of the message
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