From mboxrd@z Thu Jan 1 00:00:00 1970 From: erik quanstrom Date: Tue, 4 Oct 2011 08:05:16 -0400 To: 9fans@9fans.net Message-ID: In-Reply-To: <6588e593ea315808130c7aa775bc3adc@hamnavoe.com> References: <6588e593ea315808130c7aa775bc3adc@hamnavoe.com> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Subject: Re: [9fans] copying fossil filesystem to a bigger disk Topicbox-Message-UUID: 313eaeac-ead7-11e9-9d60-3106f5b1d025 On Tue Oct 4 08:02:13 EDT 2011, 9fans@hamnavoe.com wrote: > > perhaps there's an option bit? > > If the drive was physically formatted with 4096-byte sectors, > I can't see how changing a logical bit could prevent unaligned > writes from causing a read-modify-write cycle. you aren't up with the level of sleeze involved. what some drive makers do is give you an option to offset lbas by 1. since the standard fat layout tend to give (lba%16) == 15, if the lba used at the interface is 64 (unaligned) the drive will add 1 and get an aligned lba. - erik