On Wed, Apr 09, 2003 at 08:48:36AM -0700, Joel Becker wrote:
> In 2.5, the alignment restrictions have been relaxed. Your
> offset, buffer, and transfer size must all be aligned on the hardware
> sector size. That is the output of BLKSSZGET against the block device,
> and is also what get_hardsect_size() returns in the kernel. For almost
> all disks this number is 512b, so you can do O_DIRECT on 512b alignment
> for a raw disk or for an ext3 filesystem. About the only thing that
> may not have a 512b hardware sector size is a CD-ROM.
Well, and SCSI devices configured to use 528 byte sectors and such...
-ben
-- Junk email? <a href="mailto:aart@kvack.org">aart@kvack.org</a> - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Tue Apr 15 2003 - 22:00:18 EST