From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Martin K. Petersen" Subject: Re: Adding a smaller drive Date: Sun, 28 Jun 2009 17:49:53 -0400 Message-ID: References: <20090628194705152.ITZI24524@cdptpa-omta02.mail.rr.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: In-Reply-To: (Martin K. Petersen's message of "Sun, 28 Jun 2009 17:33:47 -0400") Sender: linux-raid-owner@vger.kernel.org To: lrhorer@satx.rr.com, linux-raid@vger.kernel.org List-Id: linux-raid.ids >>>>> "Martin" == Martin K Petersen writes: Martin> The IDEMA LBA standard applies to 3.5" form factor drives over Martin> 160GB as well as 2.5" FF drives over 80 GB. I should add that the above is for ATA drives. For SCSI-class drives the standard applies to 2.5" drives over 73GB and 3.5" drives over 450GB. I did the maths for some common capacities: Capacity (GB) LBA count (512-byte blocks) 250 488397168 500 976773168 750 1465149168 1000 1953525168 1500 2930277168 2000 3907029168 -- Martin K. Petersen Oracle Linux Engineering