blockdev from util-linux 2.27.1

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 --getdiscardzeroes get discard zeroes support status --getss get logical block (sector) size --getpbsz get physical block (sector) size --getiomin get minimum I/O size --getioopt get optimal I/O size --getalignoff get alignment offset in bytes --getmaxsect get max sectors per request --getbsz get blocksize --setbsz <bytes> set blocksize on file descriptor opening the block device --getsize get 32-bit sector count (deprecated, use --getsz) --getsize64 get size in bytes --setra <sectors> set readahead --getra get readahead --setfra <sectors> set filesystem readahead --getfra get filesystem readahead --flushbufs flush buffers --rereadpt reread partition table