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

[Mark Lord <mlord-e+AXbWqSrlAAvxtiuMwx3w@public.gmane.org>]

[-- Attachment #1: Type: text/plain, Size: 959 bytes --]

On 04/21/2010 10:04 AM, Mark Lord wrote:
> Could the people experiencing issues with this hardware,
> please give the attached copy of hdparm (pre-release) a go
> on their troublesome systems, and report back?
>
> This version uses ATA_12 for PACKET IDENTIFY and any subsequent
> commands to a PACKET device (CD, DVD, TAPE, etc..),
> and ATA_16 for everything else.
..

Mmm.. got that wrong, I guess.

Let's try again.  Does the attached copy of hdparm work for everybody 
now?  It uses ATA_16 by default, for everything.

And forces ATA_16 when it thinks it is talking to an ATAPI device.
Plus, it uses a sector count of one (1) for all IDENTIFY commands.

Note however, that USB-SATA bridge chips from other vendors have
always worked correctly without the need for the sector-count field.

Eg. The bridge that Western Digital uses in their external enclosures 
has no trouble following the SATA/SATL spec of "n/a"
for the sector-count field.

Cheers

Mark

[-- Attachment #2: hdparm.tgz --]
[-- Type: application/x-compressed-tar, Size: 113029 bytes --]