From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Leslie Rhorer" Subject: 3T drives and RAID Date: Fri, 29 Oct 2010 22:36:27 -0500 Message-ID: <2F.34.13137.FB29BCC4@cdptpa-omtalb.mail.rr.com> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids WD has finally released a 3T drive employing 4K sectors and Advanced =46ormatting. I have some questions about Linux / RAID compatibility. = The compatibility chart says using the drive with Linux requires employing = the included HBA. Is the HBA really required if the system will not be booting from the drive? =A0Why? What is the minimum kernel vers= ion required? =A0I am wanting to use these on a RAID6 array with no drive partitioning underneath the array (raw disks) using md / mdadm. =A0I'm using a pair of PM based eSATA RAID enclosures to house the drives, so if I need to replace my adapters, the replacements will need to have eSATA ports (at least 4 per card) compatible with PM enclosures, which = the included HBAs do not have. I'm not sure if the little Sil3124 adapters= I currently have will fill the bill. Performance is not a big issue. In addition, I am going to need to add capacity to my existing arrays well before I have the money to replace them completely with 3T drives. I'm going to need six 3T drives per array to completely replac= e the 1T and 1.5T drives currently in use. In the mean time, I could upgrade= the existing arrays with 1T and 1.5T drives, but that money would be more o= r less wasted when the drives are replaced in a few months. I would much rather buy a couple of 3T drives and move them over to the new array wh= en it gets built. Will there be an issue with attempting to add a 4K sector = drive to a RAID6 array built out of 512 byte sectors? -- 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