blk_queue_alignment_offset(9) suse man page | unix.com

BLK_QUEUE_ALIGNMENT_(9) 					   Block Devices					   BLK_QUEUE_ALIGNMENT_(9)

NAME
       blk_queue_alignment_offset - set physical block alignment offset

SYNOPSIS
       void blk_queue_alignment_offset(struct request_queue * q, unsigned int offset);

ARGUMENTS
       q
	   the request queue for the device

       offset
	   alignment offset in bytes

DESCRIPTION
       Some devices are naturally misaligned to compensate for things like the legacy DOS partition table 63-sector offset. Low-level drivers
       should call this function for devices whose first sector is not naturally aligned.

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Kernel Hackers Manual 2.6.					     July 2010						   BLK_QUEUE_ALIGNMENT_(9)