Date: Mon, 10 Oct 2005 12:17:12 -0400 From: David Gilbert <dgilbert@dclg.ca> To: "Kenneth D. Merry" <ken@freebsd.org> Cc: scsi@freebsd.org Subject: Re: 2048kb block size Message-ID: <17226.37896.193503.581827@canoe.dclg.ca> In-Reply-To: <20051007120504.GA38496@nargothrond.kdm.org> References: <E1ENp93-0002Ry-80@cs1.cs.huji.ac.il> <20051007120504.GA38496@nargothrond.kdm.org>
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>>>>> "Kenneth" == Kenneth D Merry <ken@freebsd.org> writes: Kenneth> On Fri, Oct 07, 2005 at 13:08:05 +0300, Danny Braniss wrote: >> hope this doesn't sound too silly, but can the scsi blcksize be >> set/changed? i know that the 'disk' can be formated to any >> blocksize, the question is does the CAM/da know about non 512 block >> size? Kenneth> CDROM drives often have jumpers to go between 2048 byte and Kenneth> 512 byte blocks. Kenneth> Some hard drives can be formatted for block sizes from 512 to Kenneth> 528 bytes. Anything larger than 512 in that case is used for Kenneth> per-sector ECC information and is typically only used by RAID Kenneth> controllers. Might be interesting to have a geom toy that used 528 byte blocks to do ECC. Dave. -- ============================================================================ |David Gilbert, Independent Contractor. | Two things can only be | |Mail: dave@daveg.ca | equal if and only if they | |http://daveg.ca | are precisely opposite. | =========================================================GLO================
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