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SubjectRe: tools support for non-512 byte sector sizes
On Wed, Jul 30, 2008 at 12:29:22PM -0500, Matt Domsch wrote:
> 2) those that report a 512-byte sector size, but are really a
> 4096-byte size, and the drive does the conversions and
> read/modify/write. T10 and T13 are looking to add commands to
> expose this different underlying physical sector size so the OS
> could be aware of it. This is primarily being driven to mitigate
> any problems that may happen with "legacy" OSs that are not aware
> of the difference.

As usual, the biggest problem will be "legacy" userspace. For
example, most partition tools are still generating legacy partition
tables that look like this:

Disk /dev/sda: 255 heads, 63 sectors, 38913 cylinders

Nr AF Hd Sec Cyl Hd Sec Cyl Start Size ID
1 80 1 1 0 254 63 121 63 1959867 83
2 00 0 1 122 254 63 619 1959930 8000370 82
3 00 0 1 620 254 63 1023 9960300 615177045 05
4 00 0 0 0 0 0 0 0 0 00
5 00 1 1 620 254 63 1023 63 615176982 8e

Note the starting sector# for the first partition.....
- Ted


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