Regarding writing into raw file

[Gnanasekar Loganathan]

Hi All,

I try to opening a file called "(hd0,2,a)+10" from GRUB.
For me open got success and able read some of the data.
But i'm not able to write some data into the file, getting "out of
partition" error.

Kindly help me, how to open, read and write into a raw file from the GRUB.

FYI: Partition type is NetBSD one.

If you need any info, kindly revert back.

Thanks,
Gnana