Provided by: udfclient_0.8.11-2_amd64 bug


     newfs_udf — construct a new UDF file system


     newfs_udf [-cFM] [-B blockingsize] [-L loglabel] [-P discid] [-p percentage] [-S sectorsize]
               [-s size] [-t gmtoff] [-V max_udf] [-v min_udf] special


     The newfs_udf utility creates an UDF file system on device special suitable for the media
     currently inserted.

     The options are as follow:

     -B blockingsize
             When creating image files, specify the blocking size or packetsize of the media to

     -c      Perform a crude surface check first to weed out disc faults on rewritable media.

     -F      Force file system construction on non-empty recordable media or create an image

     -L loglabel
             Set the disc logical label to the specified loglabel.

     -M      Disable metadata partition creation when selected UDF version or media dictates
             this.  For strict conformance and interchange, don't disable this unless its causing

     -P discid
             Set the physical disc label to the specified discid.

             Prepend discid with volsetname separated with a ':' if wanted.  For strict
             conformance and interchange, don't set this manually unless it has a unique hex
             number in the first 8 character positions.

     -p percentage
             Percentage of partition to be initially reserved for metadata on the Metadata
             partition.  It defaults to 20 %.

     -S sectorsize
             Set the sectorsize for image files.  For strict conformance and interchange, don't
             set this manually.

     -s size
             For image files, set the file size to the humanized size size.

     -t gmtoff
             Use the specified gmtoff as gmt time offset for recording times on the disc.

     -V max_udf
             Select max_udf as the maximum UDF version to be supported.  For UDF version 2.50,
             use “0x250” or “2.50”.

     -v min_udf
             Select min_udf as the minimum UDF version to be supported.  For UDF version 2.01,
             use “0x201” or “2.01”.


     The UDF file system is defined for the entire optical medium.  It can only function on the
     entire CD/DVD/BD so the raw partition has to be specified for read/write actions.  For
     newfs_udf this means specifying the raw device with the raw partition, i.e.  /dev/rcd0d or

     Some rewritable optical media needs to be formatted first before it can be used by UDF.
     This can be done using mmcformat(8).

     The default UDF version is version 2.01.


     Create a file system, using the specified names on the device /dev/rcd0d with the default
     UDF version :

           newfs_udf -P "Encyclopedia:copy-nr-1" -L "volume 2" /dev/rcd0d

     Create a 4.8 GiB sparse file and configure it using vnconfig(8) to be a 2048 sector size
     disc and create a new UDF file system on /dev/rvnd0d :

           dd if=/dev/zero of=bigdisk.2048.udf seek=9999999 count=1
           vnconfig -c vnd0 bigdisk.2048.udf 2048/1/1/1
           newfs_udf -L bigdisk /dev/rvnd0d

     Create a 2 GiB file and create a new UDF file system on it using the default 512 byte sector
     size :

           newfs_udf -L bigdisk2 -F -s 2G bigdisk2.iso

     Create a 200 MiB file and create a new UDF file system on it using a sector size of 2048 :

           newfs_udf -L bigdisk2 -F -s 200M -S 2048 bigdisk3.iso

     Create a new UDF file system on the inserted USB stick using its native sectorsize of 512 :

           newfs_udf -L "My USB stick" /dev/rsd0d


     disktab(5), disklabel(8), mmcformat(8), newfs(8)


     The newfs_udf command first appeared in NetBSD 5.0.


     Reinoud Zandijk <>


     The P and the S arguments have changed meaning.  The meaning of S has been merged into P
     since NetBSD 6.1.