Finding Sector Size of a Disk

Sector size of a disk could be found out with the blockdev command in linux

blockdev
Usage:
  blockdev -V
  blockdev --report [devices]
  blockdev [-v|-q] commands devices
Available commands:
        --getsz (get size in 512-byte sectors)
        --setro (set read-only)
        --setrw (set read-write)
        --getro (get read-only)
        --getss (get sectorsize)
        --getbsz        (get blocksize)
        --setbsz BLOCKSIZE      (set blocksize)
        --getsize       (get 32-bit sector count)
        --getsize64     (get size in bytes)
        --setra READAHEAD       (set readahead)
        --getra (get readahead)
        --flushbufs     (flush buffers)
        --rereadpt      (reread partition table)
        --rmpart PARTNO (disable partition)
        --rmparts       (disable all partitions)

To get the sector size use getss option with the device

/sbin/blockdev --getss /dev/sdd1
512

Many options could be combined together as well such as finding out block size as well as the sector size

/sbin/blockdev --getss --getbsz /dev/sdd1
512
2048

Knowing the sector size may be useful when dealing with new features of ASM.

In windows sector size could be found out with

wmic DISKDRIVE get bytespersector, caption
BytesPerSector  Caption
512             TOSHIBA MK1216GSY