Re: ATA support for 4k sector size

[H. Peter Anvin]

Martin K. Petersen wrote:
> > > > > > "hpa" == H Peter Anvin <hpa@xxxxxxxxx> writes:
>
> > > Quick answer from one of my contacts.  Desktop drives will indeed
> > > ship with an alignment of 1(*).  The alignment is hardwired at time
> > > of manufacture and can't be changed.
>
> hpa> Oh God.
>
> hpa> This is a disaster.
>
> Rationale being that modern Microsoft operating systems know how to
> interpret the alignment bits.  Legacy XP will work without changes
> thanks to the shifted alignment.  And Vista+ will do the right thing to
> align partition 1 to what the drive reports.
>
> Also note that Windows only aligns the first partition.  That's
> something we need to be aware of when setting up dual boot systems.

Yeah, but all of this completely breaks the disk image abstraction, 
which is a very powerful paradigm.

	-hpa

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