From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andy Smith Subject: Re: HBA Adaptor advice Date: Fri, 20 May 2011 20:01:00 +0000 Message-ID: <20110520200100.GF4759@bitfolk.com> References: <4DD50C89.8060006@wildgooses.com> <20110520020853.GC4759@bitfolk.com> <4DD61948.8050302@wildgooses.com> <4DD65C18.5090804@gmail.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-ripemd160; protocol="application/pgp-signature"; boundary="vH3HHxf962mwD/qo" Return-path: Content-Disposition: inline In-Reply-To: <4DD65C18.5090804@gmail.com> Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids --vH3HHxf962mwD/qo Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi Joe, On Fri, May 20, 2011 at 08:18:32AM -0400, Joe Landman wrote: >> On 20/05/2011 03:08, Andy Smith wrote: >>> Are there actually any HBAs that have BBU without using their RAID >>> features? >>> >>> I'd like to stop using hardware RAID but I can't give up the BBU and >>> write cache. > > HBAs don't have BBU or write cache. Only RAIDs do. While you can run = =20 > the RAID in JBOD mode, you effectively lose the cache (and BBU) aspect by= =20 > doing so. That's what I thought, thanks. It's a shame; maybe there will be disks with battery-backed cache one day. Cheers, Andy --vH3HHxf962mwD/qo Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) iEYEAREDAAYFAk3WyHwACgkQIJm2TL8VSQvhMQCgrxvve+lFYO7HsXd1SNrkISvT 0UAAoJbgH1Bb+9Ca56GWBF1sZmJA4ZJ6 =yS+8 -----END PGP SIGNATURE----- --vH3HHxf962mwD/qo--