BLKDISCARD(8) BLKDISCARD(8) (NAME) blkdiscard - (SYNOPSIS) blkdiscard [options] [-o offset] [-l length] device (DESCRIPTION) blkdiscard . (SSD) thinly-provisioned . fstrim(8) . blkdiscard . . device . : ! v2.41 util-linux fdisk 'T' . sfdisk --discard-free . (OPTIONS) KiB (=1024) MiB (=1024*1024) GiB TiB PiB EiB ZiB YiB ( "iB" "K" "KiB" ) KB (=1000) MB (=1000*1000) GB TB PB EB ZB YB offset length . -f, --force . v2.36 (O_EXCL) . --force . -o, --offset offset . (align) . . -l, --length length ( ). . blkdiscard . . -p, --step length . ioctl . -q, --quiet . -s, --secure (secure discard). (garbage collection) . . -z, --zeroout (zero-fill) . -v, --verbose offset length. --step . -h, --help . -V, --version . (EXIT STATUS) blkdiscard : 0 1 2 v2.39 (AUTHORS) Lukas Czerner , Karel Zak (SEE ALSO) fstrim(8) (REPORTING BUGS) . (AVAILABILITY) blkdiscard util-linux . . util-linux 2.41.5 2026-06-16 BLKDISCARD(8)