mke2fs

MKE2FS(8)                           System Manager's Manual                           MKE2FS(8)

NAME
       mke2fs - create an ext2/ext3/ext4 filesystem

SYNOPSIS
       mke2fs  [  -c | -l filename ] [ -b block-size ] [ -D ] [ -f fragment-size ] [ -g blocks-
       per-group ] [ -G number-of-groups ] [ -i bytes-per-inode ] [ -I inode-size ] [ -j ] [ -J
       journal-options  ] [ -N number-of-inodes ] [ -n ] [ -m reserved-blocks-percentage ] [ -o
       creator-os ] [ -O feature[,...]  ] [ -q ] [ -r fs-revision-level ] [ -E extended-options
       ]  [ -v ] [ -F ] [ -L volume-label ] [ -M last-mounted-directory ] [ -S ] [ -t fs-type ]
       [ -T usage-type ] [ -U UUID ] [ -V ] device [ blocks-count ]

       mke2fs -O journal_dev [ -b block-size ] [ -L volume-label ] [ -n ] [ -q ] [ -v ]  exter‐
       nal-journal [ blocks-count ]

DESCRIPTION
       mke2fs is used to create an ext2, ext3, or ext4 filesystem, usually in a disk partition.
       device is the special file corresponding to the device (e.g /dev/hdXX).  blocks-count is
       the  number  of blocks on the device.  If omitted, mke2fs automagically figures the file
       system size.  If called as mkfs.ext3 a journal is created as if the -j option was speci‐
       fied.

       The  defaults  of  the parameters for the newly created filesystem, if not overridden by
       the options listed below, are controlled by  the  /etc/mke2fs.conf  configuration  file.
       See the mke2fs.conf(5) manual page for more details.

OPTIONS
       -b block-size
              Specify  the size of blocks in bytes.  Valid block-size values are 1024, 2048 and
              4096 bytes per block.  If omitted, block-size is heuristically determined by  the
              filesystem size and the expected usage of the filesystem (see the -T option).  If
              block-size is preceded by a negative sign ('-'), then mke2fs will use  heuristics