From mboxrd@z Thu Jan  1 00:00:00 1970
From: vic.lix10@gmail.com (Vic)
Date: Tue, 3 May 2011 20:43:19 -0700
Subject: Question on hd_geometry & blk_rq_cur_sectors
Message-ID: <BANLkTin_waCfjXkq4QWgrXQS=wW8kU0vMg@mail.gmail.com>
To: kernelnewbies@lists.kernelnewbies.org
List-Id: kernelnewbies.lists.kernelnewbies.org

Hi All,
I have 2 questions on creating a ramdisk driver.

How do I init the hd_geometry for my device ie to say how do I set geo
cylinders, head, sectors and size. As this is ramdisk I dont think it
matters but want to confirm.
geo->cylinders = 1;
geo->heads = 1;
geo->sectors = Device.size/logical_block_size;
geo->start = 0;

Also, with my current settings, if I use DD on my ramdisk I get
"blk_rq_cur_sectors" count to be always 8, which confuses my drive b'se I
want to only handle 512 requests at a time.

Simple command to test the disk sing DD "sudo dd if=/dev/urandom
of=/dev/sbd0 bs=512 count=1"
with bs=512 I was hoping to see only the 512 byte request
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