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    SubjectRe: Implementing NVMHCI...
    On Mon, 2009-04-13 at 08:10 -0700, Linus Torvalds wrote:
    > On Mon, 13 Apr 2009, Avi Kivity wrote:
    > > > Of course, the _really_ conclusive thing (in a virtualized environment) is
    > > > to just make the virtual disk only able to do 16kB IO accesses (and with
    > > > 16kB alignment). IOW, actually emulate a disk with a 16kB hard sector size,
    > > > and reporting a 16kB sector size to the READ CAPACITY command. If it works
    > > > then, then clearly WNT has no issues with bigger sectors.
    > >
    > > I don't think IDE supports this? And Windows 2008 doesn't like the LSI
    > > emulated device we expose.
    > Yeah, you'd have to have the OS use the SCSI commands for disk discovery,
    > so at least a SATA interface. With IDE disks, the sector size always has
    > to be 512 bytes, I think.

    Actually, the latest ATA rev supports different sector sizes in
    preparation for native 4k sector size SATA disks (words 117-118 of
    IDENTIFY). Matthew Wilcox already has the patches for libata ready.


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