From: David Laight
>
> From: Norman Diamond
> ...
>> By the way, I've seen some USB bridges that lie about whether they
>> performed various SAT commands (ATA passthrough), but told the truth
>> about performing an ATA IDENTIFY DEVICE through SAT. So we could attempt
>> ATA passthrough with an IDENTIFY DEVICE command, and if it happens to
>> return a sane looking result, we could comparre it to the bridge's own
>> translation of READ_CAPACITY_10 and READ_CAPACITY_16. If the passthrough
>> yielded a sane result and the capacity doesn't match, we know not to
>> trust the bridge with 16-byte commands (except if tested, as mentioned).
>> In such a case, we don't even have to look at the partition table. Of
>> course if the ATA passthrough fails or if the result is garbage then
>> abandon this test and maybe look at the partition table.
> ...
>
> Don't count on devices answering ATA IDENTIFY correctly either.
Of course. That's why you quoted me saying this:
>> Of
>> course if the ATA passthrough fails or if the result is garbage then
>> abandon this test and maybe look at the partition table.
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