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The issue is that to flag a SATA port as an external/internal port solely is SATA controller hardware, plus BIOS function. But, the only open spec for SATA controller is AHCI, and not all SATA controller chipset uses AHCI spec. On the other hand, SATA protocol spec is a well accepted spec by the industry, but there is no place for this. For this reason, Microsoft has submitted a white paper/proposal to SATA-IO six months ago. But, due to the lack of interests at that time, the proposal has been put on the back seat. Now, I have a system with an external SATA port on the back panel and an external 250GB SATA HDD. As a user, I'm experiencing all issues that I talked about at the beginning of this thread. Again, the industry as a whole needs to address them now. Or the usage of external SATA device(HDD)will be very limited. Thanks, Frank -----Original Message----- From: Dees, Brian M [mailto:[EMAIL PROTECTED] Sent: Thursday, July 20, 2006 7:46 AM To: Frank Shu; [EMAIL PROTECTED]; [email protected] Subject: RE: [t13] What's the difference of eSATA Hard drive and normal SATA-II hard drive? There are standard SATA host controller interfaces available today which have the capability of reporting different port capabilities/limitations (external/internal, hot pluggability, etc...). With that understood, it should be rather straightforward to understand (through SW) what capabilities are available on a port which a device in question is connected to. Example - AHCI (http://www.intel.com/technology/serialata/ahci.htm) Regards, Brian Dees -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Frank Shu Sent: Monday, July 17, 2006 5:41 PM To: [EMAIL PROTECTED]; [email protected] Subject: RE: [t13] What's the difference of eSATA Hard drive and normal SATA-II hard drive? This message is from the T13 list server. Some of the issues do exist today, but eSATA HDD can just make them even bigger(like security). Some of issues are controlled by OS today, for instance, you can not boot from a USB device. But, It will be absolutely unacceptable if we can't boot from a (e)SATA HDD since there is no standard way to tell which port is a internal or external SATA port on a SATA controller chip today in the spec. Frank Shu [EMAIL PROTECTED] -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Hale Landis Sent: Thursday, July 13, 2006 9:09 AM To: [email protected] Subject: RE: [t13] What's the difference of eSATA Hard drive and normal SATA-II hard drive? This message is from the T13 list server. Frank Shu said: > Furthermore, eSATA device, especially eSATA hard drive, also introducs > issues like data security, boot/non-boot, authentication and licensing. > The industry as a whole needs to address those issues before eSATA device > can be very useful. Why is an external SATA (aka eSATA?) any different than an external USB or 1394 hard disk drive? -- Hale Landis -- [EMAIL PROTECTED]
