mkreiserfs - Man Page

The create tool for the Linux ReiserFS filesystem.


mkreiserfs [ -dfV ] [ -b | --block-size N ] [ -h | --hash HASH ] [ -u | --uuid UUID ]  [ -l | --label LABEL ] [ --format FORMAT ] [ -q | --quiet ] [ -j | --journal-device FILE ] [ -s | --journal-size N ] [ -o | --journal-offset N ] [ -t | --transaction-max-size N ] [ -B | --badblocks file ] device [ filesystem-size ]


mkreiserfs creates a Linux ReiserFS filesystem on a device (usually a disk partition).


is the special file corresponding to a device or to a partition (e.g  /dev/hdXX for an IDE disk partition or /dev/sdXX for a SCSI disk partition).


is the size in blocks of the filesystem. If omitted, mkreiserfs will automatically set it.


-b | --block-size N

N is block size in bytes. It may only be set to a power of 2 within the 512-8192 interval.

-h | --hash HASH

HASH specifies which hash function will sort the names in the directories. Choose from r5, rupasov, or tea. r5 is the default one.

--format FORMAT

FORMAT specifies the format for the new filsystem. Choose format 3.5 or 3.6. If none is specified mkreiserfs will create format 3.6 if running kernel is 2.4 or higher, and format 3.5 if kernel 2.2 is running, and will refuse creation under all other kernels.

-u | --uuid UUID

Sets  the  Universally  Unique  IDentifier  of  the  filesystem  to  UUID  (see  also  uuidgen(8)).  The  format  of  the  UUID  is  a  series  of  hex  digits separated by hypthens, e.g.: "c1b9d5a2-f162-11cf-9ece-0020afc76f16". If  the option  is skipped,  mkreiserfs  will by default generate a new UUID.

-l | --label LABEL

Sets  the  volume  label  of  the filesystem. LABEL can at most be 16 characters long; if it is longer than 16 characters, mkreiserfs will  truncate it.

-q | --quiet

Sets mkreiserfs to work quietly without producing messages, progress or questions. It is useful, but only for use by end users, if you run mkreiserfs  in a script.

-j | --journal-device FILE

FILE is the name of the block device on which is to be places the  filesystem journal.

-o | --journal-offset N

N is the offset where the journal starts when it is to be on a separate device. Default is 0. N has no effect when the journal is to be on the host device.

-s | --journal-size N

N is the size of the journal in blocks. When the journal is to be on a separate device, its size defaults to the number of blocks that the device has. When journal is to be on the host device, its size defaults to 8193 and the maximal possible size is 32749 (for blocksize 4k). The minimum size is 513 blocks (whether the journal is on the host or on a separate device).

-t | --transaction-max-size N

N is the maximum transaction size parameter for the journal. The default, and max possible, value is 1024 blocks. It should be less than half the size of the journal. If specified incorrectly, it will automatically  be adjusted.

-B | --badblocks file

File is the file name of the file that contains the list of blocks to be  marked as bad on the filesystem. This list can be created by /sbin/badblocks -b block-size device.


Forces mkreiserfs to continue even when the device is the whole disk,  looks mounted, or is not a block device. If -f is specified more than once, it allows the user to avoid asking for confirmation.


Sets mkreiserfs to print debugging information during mkreiserfs.


Prints the version and then exits.


This version of mkreiserfs has been written by Edward Shishkin <>.


Please report bugs to the ReiserFS developers <>, providing  as much information as possible--your hardware, kernel, patches, settings, all printed messages; check the syslog file for any related information.

See Also

reiserfsck(8), debugreiserfs(8), reiserfstune(8)

Referenced By

debugreiserfs(8), reiserfsck(8), reiserfstune(8).

The man page mkfs.reiserfs(8) is an alias of mkreiserfs(8).

January 2009 Reiserfsprogs-3.6.27