Re: System hangs when using USB 3.0 HD with on Ubuntu

Luben Tuikov
2010-04-21T14:58:16Z

On Apr 21, 2010, at 6:52, Mark Lord <mlord@pobox.com> wrote:

On 21/04/10 08:47 AM, Luben Tuikov wrote:
starts at line 8816. (It says the
command
is a BLANK command, but it's incorrectly
identified that command.)

Application clients should send ATA PASS-THROUGH (16) and never the 12 byte version to ATAPI devices behind a SAT bridge, whose opcode is interpreted as BLANK (as pointed out by Doug), and BLANK executed.
..

That's a nice self-proclamation.
Got a pointer to a SAT or ATA/SATA standard that says it for real?

If you think this is a "self-proclamation" and want a spec to spell it out, then go ahead and send ATA PT 12 to ATAPI devices behind a SAT bridge. Just make sure there is no RW media in the device. :-)

The problem with that statement (above), becomes.. what to use
for the initial IDENTIFY request, before the type of device is known?

The statement above tells you: use ATA PT 16.

Luben