+For a new consumer hard drive with 4Kbyte sectors:
+
+ $ cat /sys/block/sda/queue/hw_sector_size
+ 4096
+ $ cat /sys/block/sda/queue/physical_block_size
+ 4096
+ $ cat /sys/block/sda/queue/logical_block_size
+ 4096
+ $ cat /sys/block/sda/queue/minimum_io_size
+ 4096
+ $ cat /sys/block/sda/queue/optimal_io_size
+ 0
+