Date: Wed, 16 Dec 2009 12:57:24 +1030 From: "Daniel O'Connor" <doconnor@gsoft.com.au> To: freebsd-current@freebsd.org Cc: Bruce Simpson <bms@incunabulum.net>, "b. f." <bf1783@googlemail.com>, dougb@freebsd.org Subject: Re: AHCI/ATA_CAM for dummies? Message-ID: <200912161257.26844.doconnor@gsoft.com.au> In-Reply-To: <4B277DFF.2050704@incunabulum.net> References: <d873d5be0912132105p6fea5f74ld0caf2cfe43cd808@mail.gmail.com> <4B277DFF.2050704@incunabulum.net>
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--nextPart7834404.hAK4hRMSN6 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On Tue, 15 Dec 2009, Bruce Simpson wrote: > b. f. 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." > > Please search stable@ archives for my bad experiences with ataraid. > > IMHO, this stuff needs serious attention before it could be > considered useful, so the lack of ataraid in the new world order is > not that much of a loss, to my mind anyway. It worked well in 4.x in my experience, but I had issues with 6.x and=20 switched to "real" (3ware) RAID cards after that. That said even in 4.x you could get spontaneous splits which was quite=20 annoying. 6.x would do things like pick the "wrong" side of the mirror (ie one=20 that is out of date) which causes hilarity to ensue when you find data=20 for the last week has gone away.. =2D-=20 Daniel O'Connor software and network engineer for Genesis Software - http://www.gsoft.com.au "The nice thing about standards is that there are so many of them to choose from." -- Andrew Tanenbaum GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C --nextPart7834404.hAK4hRMSN6 Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.12 (FreeBSD) iD4DBQBLKEWO5ZPcIHs/zowRAouMAJYhbsUvsOK7Lgrdug60gk0eD0hIAJ9URroN RxUkFx+s5PLu2qbu6xriUQ== =M0nN -----END PGP SIGNATURE----- --nextPart7834404.hAK4hRMSN6--
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