Question on hd_geometry & blk_rq_cur_sectors
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
On Wed, May 4, 2011 at 10:43, Vic <vic.lix10@gmail.com> wrote:
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
read ahead setting, maybe? -- regards, Mulyadi Santosa Freelance Linux trainer and consultant blog: the-hydra.blogspot.com training: mulyaditraining.blogspot.com
participants (2)
-
Mulyadi Santosa -
Vic