From mboxrd@z Thu Jan 1 00:00:00 1970 From: Greg Freemyer Subject: Re: Adding a smaller drive Date: Tue, 30 Jun 2009 14:22:20 -0400 Message-ID: <87f94c370906301122p404c5cbcg61a8dfa81ee78594@mail.gmail.com> References: <20090628194705152.ITZI24524@cdptpa-omta02.mail.rr.com> <4A4A4506.1070003@tmr.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <4A4A4506.1070003@tmr.com> Sender: linux-raid-owner@vger.kernel.org To: Bill Davidsen Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids On Tue, Jun 30, 2009 at 1:01 PM, Bill Davidsen wrote: > Leslie Rhorer wrote: >>>> >> =A0 =A0 =A0 =A0I may have to rethink my position on using raw drives= =2E =A0If I >> partition the drives, I can make the partition a bit smaller than th= e >> whole >> drive, allowing for the addition of a future drive whose size is a b= it >> off. >> I hate to waste space, but being stuck with an undersized or limping= array >> is worse. >> > > Some manufacturers use the HPA (host protected area) to reduce the si= ze > available to the user. You will see reference to this in the dmesg ou= tput. > There is a tool to let you see/set HPA, but I can't put my hand on th= e info > right now, the one I have is out of date, so I won't mention it. Any recent version of hdparm can get/set HPA for LBA-48 drives. That feature went in a couple years ago. And it is the only tool I know that works with LBA-48 drives. (ie. drives larger than 128 GiB). If your version is too old you can get a new version off of sourceforge I believe. Greg --=20 Greg Freemyer Head of EDD Tape Extraction and Processing team Litigation Triage Solutions Specialist http://www.linkedin.com/in/gregfreemyer Preservation and Forensic processing of Exchange Repositories White Pap= er - http://www.norcrossgroup.com/forms/whitepapers/Forensic%20Processing%20= of%20Exchange%20WP%20final.pdf The Norcross Group The Intersection of Evidence & Technology http://www.norcrossgroup.com -- To unsubscribe from this list: send the line "unsubscribe linux-raid" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html