Messages in this thread | ![/](/images/icornerl.gif) | | Date | Mon, 27 Oct 2003 18:03:56 -0800 | From | jw schultz <> | Subject | Re: Blockbusting news, results end |
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On Mon, Oct 27, 2003 at 02:57:27PM -0800, jw schultz wrote: > On Mon, Oct 27, 2003 at 02:27:09PM -0800, Andre Hedrick wrote: > > > > To date IDEMA has not released a formal spec for drive makers to switch to > > 4Kb sectors. If they have, then when running in compatibility mode, a > > heavy read-modify-write happens to goto the pseudo sector of 512b. > > > > Linux can not handled new IDEMA calls currently. > > Irrelevant!
Andre, if you were trying to say what i am about to, i apologise.
> I am assuming that these numbers are applicable (one is > unknown): > logical sector size == 512B > physical sector size == ???B > page size/filesystem block size == 4KB
I have dialoged with Eric Mudama. He is 99% sure that no manufacturer of is making ATA drives with physical sectors larger than 512B. I'll let that statement trump Norman Diamond's until i hear otherwise.
The drive manufacturers would like to be able to go to a larger physical sector but the read-modify-write is just too scary. If they could be sure of market acceptance of drives that required all I/O to be in larger units they would build them because it would allow greater capacity (and i'm guessing speed as well) on the same physical hardware. I look forward to the day with Linux has enough market-share to influence the hardware manufacturers.
In any case, unless someone can authoritatively contradict Eric we can ignore the firmware read-modify-write implications of unreadable sectors.
End-of-subthread! or in the words of Emily Latella "Never-mind".
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