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# hdparm -I /dev/sdc | grep 'sector size' -i
        Logical  Sector size:                   512 bytes
        Physical Sector size:                  4096 bytes
# echo 'p' | fdisk /dev/sdc | grep 'sector size' -i
Sector size (logical/physical): 512 bytes / 512 bytes
# cat /sys/block/sdc/queue/physical_block_size
512