On 11/16/06, Rajat Jain <rajat.noida.india@xxxxxxxxx> wrote:
> Hello Friends,
>
> I want to find first sector of the hard disk partation using C. Means detail
> information of that hard disk ie what is start sector and end sector of the
> partation. So that after finding that sector I can read/write on that
> sector.
>
> Please help me.
>
Read and parse the MBR ... !
Yes, this can be done from user-space, but if want to get this
information in kernel then you can get the start and end sector of any
partition through :
Get struct block_device of you desired drive (like /dev/hda). Can use
function lookup_bdev() for this. From block_device (which you got from
lookup_bdev function) you can get each partition information like:
............
struct block_device *bdev = lookup_bdev("/dev/hda");
sector_t start_sector =
bdev->bd_disk->part[<partition_minor_like_1_for_hda1>]->start_sect;
sector_t num_sectors =
bdev->bd_disk->part[<partition_minor_like_1_for_hda1>]->nr_sects;
............
And now end_sector = start_sector + num_sector ....
--
Fawad Lateef
--
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