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SubjectRe: [PATCH] Bogus LBA48 drives
Geert Uytterhoeven wrote:
> On Wed, 31 Mar 2004, Jeff Garzik wrote:
>
>>Andries Brouwer wrote:
>>
>>>Hmm. I read in my copy of ATA7:
>>>
>>> 6.16.55 Words (103:100): Maximum user LBA for 48-bit Address feature set
>>> Words (103:100) contain a value that is one greater than the maximum LBA
>>> in user accessable space when the 48-bit Addressing feature set is supported.
>>> The maximum value that shall be placed in this field is 0000FFFFFFFFFFFFh.
>>> Support of these words is mandatory if the 48-bit Address feature set is supported.
>>>
>>>Do you read differently?
>>
>>The errata is, one needs to check that field for zero, and use the other
>>one if so...
>
>
> Which is not sufficient for `my' drives, since I get disk errors if I just use
> the other capacity field and don't disable LBA48 completely.
>
> I'll check the ATA specs myself, if I find some time...

If it's reporting the "48-bit feature set supported" but doesn't really
support it, I'd vote for broken drive :) Maybe check for a firmware
update on the manufacturer's web site?

Jeff




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