Reading the datasheet, my interpretation is Seagate has taken a ide drive chassis (7200rpm, PMR, slow seek times, etc) and added a SAS interface board. They mention the sas version offers improved performance over the sata version, and also the sas version supports a dual-port interface. Other more expensive SAS drives take a scsi drive chassis (10-15krpm, GMR, fast seek times) and add the SAS interface board.
I guess I'm saying, if you interpret the name "Serial Attached Scsi" literally, then the Seagate ES.2 is not an SAS drive - it is not a scsi drive with a serial interface. However, if you interpret SAS as an interface standard, then the interface board determines what the drive is, more so than its mechanical construction.
-Gordon
On Fri, Nov 7, 2008 at 12:16 PM, Jerry Franz jfranz@freerun.com wrote:
Steve Thompson wrote:
On Fri, 7 Nov 2008, Gordon McLellan wrote:
I meant SAS; specifically Seagate Barracuda ES.2 drives. Here's a tiny version of their huge url:
No, they are not the super fast and expensive 15krpm database drives.
Indeed. They're not SAS either.
From the manufacturer's page: "Barracuda ES.2 SAS 3.0-Gb/s 1-TB Hard Drive"
Sure sounds like SAS to me. What leads you to believe they are not being truthful?
-- Benjamin Franz _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos