Re: finding the offset of a partition
Re: finding the offset of a partition
- Subject: Re: finding the offset of a partition
- From: Jason Bobier <email@hidden>
- Date: Fri, 3 Feb 2006 11:06:51 -0800
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This was to get the offset for the whole disk. The LOG2PHYS gets it for the partition.
Jason On Feb 3, 2006, at 8:49 AM, Shawn Erickson 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.
Are you doing raw access to the whole disk? or to a slice (partition) of that disk? The offset may already be dealt with for you depending on how you are doing your IO.
-Shawn
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