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Message-ID: <20061105214903.GC1847@elf.ucw.cz> Date: Sun, 5 Nov 2006 22:49:03 +0100 From: Pavel Machek <pavel@....cz> To: Mikulas Patocka <mikulas@...ax.karlin.mff.cuni.cz> Cc: Albert Cahalan <acahalan@...il.com>, kangur@...com.net, linux-kernel@...r.kernel.org Subject: Re: New filesystem for Linux Hi! > >>>As my PhD thesis, I am designing and writing a filesystem, > >>>and it's now in a state that it can be released. You can > >>>download it from http://artax.karlin.mff.cuni.cz/~mikulas/spadfs/ > >> > >>"Disk that can atomically write one sector (512 bytes) so that > >>the sector contains either old or new content in case of crash." > > > >New drives will soon use 4096-byte sectors. This is a better > >match for the normal (non-VAX!) page size and reduces overhead. > > The drive (IDE model, SCSI can have larger sector size) will do > read-modify-write for smaller writes. So there should be no compatibility > issues. (this possibility is in new ATA standard and there is a way how to Actually, there are. If you assume powerfail can only destroy 512 bytes... read-modify-write of 4K is going to destroy your "only 512 bytes destroyed" assumption... Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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