Date: Thu, 10 Dec 2009 07:31:41 -0700 From: Scott Long <scottl@samsco.org> To: Alexander Motin <mav@freebsd.org> Cc: FreeBSD-Current <freebsd-current@freebsd.org>, freebsd-arch@freebsd.org Subject: Re: Testing CAM wrapper for ata(4) controller drivers Message-ID: <914B9BC0-7C9D-41F1-9929-046E39C5B31C@samsco.org> In-Reply-To: <4B20C720.6080105@FreeBSD.org> References: <4B1671EE.1010301@FreeBSD.org> <4B20C720.6080105@FreeBSD.org>
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On Dec 10, 2009, at 3:02 AM, Alexander Motin wrote: > Alexander Motin wrote: >> The main regression of the new mode is a lack of ataraid >> alternative, to >> support cheap BIOS-based ATA RAIDs. If somebody has time and wish to >> port that code from inside ata(4) into GEOM module, to make it work >> over >> CAM also, I would appreciate that and propose a help, if needed. > > May be it would be easier to just teach gmirror, gstripe and gconcat > to > handle ATA RAIDs metadata formats, to not duplicate and support the > rest > of code. > The existing graid modules are not well suited for learning new metadata. I have plans for restructuring them into a stack within GEOM that handles metadata separate from the transforms. Scott
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