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

Mark Lord
2010-04-02T21:24:07Z

>> Confirming that, what is put in the ATA_16 sector
>> count field is what the ATA command (IDENTIFY DEVICE)
>> expects in its count field. And according to ACS-2 (rev 2)
>> for IDENTIFY DEVICE that is "N/A" which I would
>> interpret as zero.
>
> Ouch. Reviewing that "N/A" in the ATA spec: it means
> that neither the host nor device should check that
> field. So it could be any value, in this case 1.
..

I'll update hdparm (version 9.29) to supply a sector count of "1"
for IDENTIFY commands, just to satisfy the buggy bridge chip.

Cheers
--
Mark Lord
Real-Time Remedies Inc.
mlord-e+AXbWqSrlAAvxtiuMwx3w@public.gmane.org
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