Date: Fri, 31 Jan 2003 14:50:42 -0500 From: Nathan Hawkins <utsl@quic.net> To: Steve Byan <stephen_byan@maxtor.com>, freebsd-fs@FreeBSD.ORG, tech-kern@netbsd.org Subject: Re: DEV_B_SIZE Message-ID: <20030131195042.GD6243@quic.net> In-Reply-To: <B8AB7B3A-354F-11D7-B26B-00306548867E@maxtor.com> References: <Pine.3.89.10301311357.A20439-0100000@uranium.vaxpower.org> <B8AB7B3A-354F-11D7-B26B-00306548867E@maxtor.com>
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On Fri, Jan 31, 2003 at 02:10:54PM -0500, Steve Byan wrote: > Thanks, I'm aware of the excellent CMU paper. In fact, if anyone wants > a way to get the complete physical geometry of Maxtor SCSI disks just > by reading mode-pages, email me and I can supply the details. I'd be interested in that. Are those published? > My concern is with the proposed backward-compatibility mode, which I > fear subtly breaks the failure semantics which systems with persistent > storage rely upon to recover. You might want to talk with Veritas. I'm pretty sure their Volume Manager's log subdisks assume 512-byte sectors. More generally, what impact would this have on existing RAID implementations, hardware or software? This is a potentially more damaging impact than filesystem semantics. ---Nathan To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-fs" in the body of the message
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