/sys/block/sda/alignment_offset 0 /sys/block/sda/queue/minimum_io_size 512 /sys/block/sda/queue/optimal_io_size 0 /sys/block/sda/queue/physical_block_size 512
/sys/block/ sda/alignment_ offset sda/queue/ minimum_ io_size sda/queue/ optimal_ io_size sda/queue/ physical_ block_size
0
/sys/block/
512
/sys/block/
0
/sys/block/
512