Re: finding the offset of a partition

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Jason Bobier            email@hidden

PGP Corporation

www.pgp.com

Hi Jason,

Why not match the encryption scheme driver against your partition?  It would not be relevant what it is relative to, assuming it is even an "offset" transform.

Dan

On 3 Feb 2006, at 11:40 AM, Jason Bobier wrote:

In the driver, the disk and the partition are represented by IOMedia objects and you can use getBase on the partition to know where it is relative to the disk. So the system knows how the two are related.

I'm trying to get the offset on disk of a particular file. In order to do this I use F_LOG2PHYS which gives me the offset from the beginning of the partition. So I need to add the partition offset somehow.

Thanx,

Jason

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Jason Bobier            email@hidden

Space Cowboy            http://www.prismatix.com/

It's hard to pull yourself up by your bootstraps if your feet are bare.

On Feb 2, 2006, at 11:28 PM, Justin C. Walker wrote:

On Feb 2, 2006, at 22:49 , Jason Bobier wrote:

I can't seem to find a way to find the offset of a partition on a drive without reading the partition table myself. Is there an easy way to do this?

i.e. given disk1s1 what is it's offset from the beginning of disk1?

AFAIK, there is nothing intrinsic about partitions.  It's the partition table that defines them.  That's what the system uses to find them, when partitions on a disk are mounted.  Why do you think it's otherwise possible?

Regards,

Justin

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Justin C. Walker, Curmudgeon-At-Large

Institute for the Absorption of Federal Funds

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