Provided by: udftools_2.2-1_amd64 bug

NAME

       mkudffs — create a UDF filesystem

SYNOPSIS

       mkudffs [ options ] device [ blocks-count ]

DESCRIPTION

       mkudffs  is  used  to  create a UDF filesystem on a device (usually a disk). device is the
       special file corresponding to the device (e.g. /dev/hdX) or file  image.  blocks-count  is
       the  number  of  blocks  on  the  device.  If  omitted,  mkudffs automagically figures the
       filesystem size. The order of options matters. Encoding option must be first  and  options
       to override default settings implied by the media type or UDF revision should be after the
       option they are overriding.

OPTIONS

       -h,--help
              Display the usage and list of options.

       -l,--label= label
              Specify the UDF label. UDF label is synonym for specifying both  --lvid  and  --vid
              options.  If  omitted,  mkudffs  label is LinuxUDF. (Option available since mkudffs
              1.1)

       -u,--uuid= uuid
              Specify the UDF uuid. It must be exactly 16 hexadecimal  lowercase  digits  and  is
              used  for  first  16  characters  of --fullvsid option. If omitted, mkudffs uuid is
              generated from local time and a random number. (Option available since mkudffs 1.1)

       -b,--blocksize= block-size
              Specify the size of blocks in bytes. Valid block size for a UDF filesystem is power
              of two in range from 512 to 32768 and must match a device logical (sector) size. If
              omitted, mkudffs block size is set  to  device  logical  block  (sector)  size.  If
              logical  block  (sector)  size  is unknown (e.g. when creating disk image) then for
              --media-type=hd is used block size 512 and for other media types  2048.  (Prior  to
              mkudffs 1.1 default value was always 2048 independently of --media-type)

       -m,--media-type= media-type
              Specify  the  media  type.  Must  be  specified  before  --udfrev. Default value is
              autodetected. When autodetection does not work (e.g. when creating disk image) then
              hd value is assumed. Valid media types are:

                   hd              HD (Hard Disk)

                   worm            WORM (Write Once Read Many)

                   mo              MO (Magneto Optical)

                   cd              CD-ROM (CD Read-Only Memory)

                   cdr             CD-R (CD Recordable)

                   cdrw            CD-RW (CD Read-Write)

                   dvd             DVD-ROM (DVD Read-Only Memory)

                   dvdr            DVD-R (DVD Recordable)

                   dvdrw           DVD-RW (DVD Read-Write)

                   dvdram          DVD-RAM (DVD Random Access Memory)

                   bdr             BD-R (Blu-ray Disc Recordable)

              (Short  option  variant -m and values cd, dvdr, bdr are available since mkudffs 2.0
              and autodetection is supported since mkudffs 2.2)

       -r,--udfrev= udf-revision
              Specify the UDF revision to use, either in hexadecimal BCD (e.g. 0x0201) or decimal
              (e.g.  2.01)  format.  Valid  revisions  are 1.01, 1.02, 1.50, 2.00, 2.01, 2.50 and
              2.60. If omitted, mkudffs UDF revision is 2.01, except for Blu-ray Discs  which  is
              2.50.  UDF  revisions  higher  then 2.01 are experimental. Option must be specified
              after --media-type. (Values in decimal format and UDF revisions  higher  then  2.01
              are supported since mkudffs 2.0, UDF revision 1.01 is supported since mkudffs 2.1)

       -n,--no-write
              Not  really,  do  not  write to device. Just simulate and display what would happen
              with device. Useful for  determining  the  calculated  location  of  different  UDF
              blocks. (Option available since mkudffs 2.0)

       --new-file
              Create  a  new  image  file  specified by device with blocks-count and fail if file
              already exists. If omitted, mkudffs creates a new image file only in case  it  does
              not exist yet. (Option available since mkudffs 2.0)

       --lvid= logical-volume-identifier
              Specify   the  Logical  Volume  Identifier.  If  omitted,  mkudffs  Logical  Volume
              Identifier is LinuxUDF. Most UDF implementations use  this  identifier  as  a  disk
              label.

       --vid= volume-identifier
              Specify the Volume Identifier. If omitted, mkudffs Volume Identifier is LinuxUDF.

       --vsid= volume-set-identifier
              Specify the 17.–127. character of Volume Set Identifier. If omitted, mkudffs Volume
              Set Identifier is LinuxUDF.

       --fsid= file-set-identifier
              Specify the File Set  Identifier.  If  omitted,  mkudffs  File  Set  Identifier  is
              LinuxUDF.

       --fullvsid= full-volume-set-identifier
              Specify  the  full  Volume  Set  Identifier.  Overwrite  previous --uuid and --vsid
              options. (Option available since mkudffs 1.1)

       --uid= uid
              Specify the uid of the root (/) directory. If omitted, mkudffs uid  is  0.  Special
              value -1 means invalid or not specified uid. (Option available since mkudffs 1.1)

       --gid= gid
              Specify  the  gid  of the root (/) directory. If omitted, mkudffs gid is 0. Special
              value -1 means invalid or not specified gid. (Option available since mkudffs 1.1)

       --mode= mode
              Specify permissions in octal mode bits of  the  root  (/)  directory.  If  omitted,
              mkudffs mode is 0755. (Option available since mkudffs 2.0)

       --read-only
              This option specify that the whole UDF disk should be treated as read-only. It sets
              SoftWriteProtect  domain  flag  in  Logical  Volume  Descriptor  and  in  File  Set
              Descriptor.  Plus  for  overwritable media types (hd, dvdram, dvdrw) set UDF Access
              Type to read-only. (Option available since mkudffs 2.2)

       --bootarea= fill
              Specify how to fill UDF boot area which is the first 32kB of the disk  and  is  not
              used  by UDF itself. Option mbr make sense only when running mkudffs on whole disk,
              not on just one partition. Valid options are:

                   preserve      preserve existing UDF boot area, do not touch  it  (default  for
                                 media type different from hd)

                   erase         erase  existing  UDF boot area, fill it by zeros (default for hd
                                 media type on partitions and on removable disks)

                   mbr           put MBR table with  one  partition  which  starts  at  sector  0
                                 (includes  MBR  itself) and spans whole disk device, needed only
                                 for non-removable hard disks used on Microsoft  Windows  systems
                                 (default  for  hd  media type on non-removable hard disk without
                                 partitions), see section WHOLE DISK VS PARTITION

              (Option available since mkudffs 2.0)

       --strategy= strategy
              Specify the allocation strategy to  use.  Valid  strategies  are  4  and  4096.  If
              omitted, mkudffs strategy is based on the --media-type.

       --spartable, --spartable= spartable-number
              Enable  usage  Sparing Table. Optionally specify also the number of sparing tables.
              Valid numbers are 1–4. When the spartable number is omitted  then  two  tables  are
              written  to  the disc. If the option is omitted then usage of Sparing Table depends
              on the media type. (Option prior to mkudffs 2.0 was available only for  cdrw  media
              type)

       --sparspace= num-of-entires
              Specify  the  number of entries in Sparing Table. If omitted, the default number of
              entries is 1024, but depends on the media type.  (Option  available  since  mkudffs
              2.0)

       --packetlen= length
              Packet  length  in  a  number  of  blocks  used  for  alignment. All continuous UDF
              structures would be aligned to packets. It specifies also the size of  the  Sparing
              Space  and  packet  length  in Sparing Table. It should match the device ECC/packet
              length. If omitted, default value for DVD discs is 16 blocks, for CD/BD discs it is
              32  blocks  and  otherwise 1 block. (Option prior to mkudffs 2.1 was available only
              for cdrw and dvdrw media types)

       --vat  Enable usage of Virtual Allocation Table (VAT). If omitted, usage  depends  on  the
              media type. (Option available since mkudffs 2.0)

       --closed
              Close  disc  with  Virtual Allocation Table. AVDP is written also to the end of the
              disc. By default, the disc with Virtual Allocation Table is not closed.

       --space= space
              Specify the Space Set. Unallocated Space Set is used for media which blocks may  be
              allocated  immediately.  Freed Space Set is used for media which blocks needs to be
              specially prepared/erased before allocation. In  Space  Table  is  stored  list  of
              unallocated  extents.  In  Space Bitmap is stored bitmap of unallocated blocks. Not
              used for VAT.

                   freedbitmap     Freed Bitmap

                   freedtable      Freed Table

                   unallocbitmap   Unallocated Bitmap (default)

                   unalloctable    Unallocated Table

       --ad= ad
              Specify the Allocation Descriptors of the root (/) directory.

                   inicb           Allocation Descriptors in ICB (default)

                   short           Short Allocation Descriptors

                   long            Long Allocation Descriptors

       --noefe
              Don't Use Extended File Entries for the root (/) directory. Affects only  UDF  2.00
              or higher. Must be specified after --udfrev.

       --locale
              Treat  identifier string options as strings encoded according to the current locale
              settings (default). Must be specified as  the  first  argument.  (Option  available
              since mkudffs 2.0)

       --u8   Treat identifier string options as strings encoded in 8-bit OSTA Compressed Unicode
              format  without  leading  Compression  ID  byte,  which  is  equivalent  to  Latin1
              (ISO-8859-1). Must be specified as first argument.

       --u16  Treat  identifier  string  options  as  strings  encoded  in 16-bit OSTA Compressed
              Unicode format  without  leading  Compression  ID  byte,  which  is  equivalent  to
              UTF-16BE.  Note  that  it  is  not  possible  to  include zero byte in command line
              options, therefore any character which  has  at  least  one  zero  byte  cannot  be
              supplied  (this  applies  to all Latin1 characters). Must be specified as the first
              argument.

       --utf8 Treat identifier string options as strings encoded in UTF-8. Must be  specified  as
              the first argument. (Prior to mkudffs 2.0 this was default option)

COMPATIBILITY

   OPERATING SYSTEMS SUPPORT
       UDF  filesystem  is natively supported by large amount of operating systems. See following
       compatibility table:

       ┌────────────────────────────┬──────────────────────────┐
       │     Operating system       │ Maximum UDF revision for │
       ├─────────┬──────────────────┼────────────┬─────────────┤
       │  Name   │     Version      │    read    │    write    │
       ├─────────┼──────────────────┼────────────┼─────────────┤
       │         │ 2.3.17 – 2.4.5   │    2.00    │    2.00     │
       │Linux    │ 2.4.6 – 2.6.25   │    2.01    │    2.01     │
       │         │ 2.6.26 (and new) │    2.50    │    2.01     │
       ├─────────┼──────────────────┼────────────┼─────────────┤
       │         │ 98/Me            │    1.02    │    none     │
       │Windows  │ 2000             │    1.50    │    none     │
       │         │ XP               │    2.01    │    none     │
       │         │ Vista (and new)  │    2.60    │    2.50     │
       ├─────────┼──────────────────┼────────────┼─────────────┤
       │Mac OS   │ 8.1 – 8.5        │    1.02    │    none     │
       │         │ 8.6 – 9.2        │    1.50    │    1.50     │
       ├─────────┼──────────────────┼────────────┼─────────────┤
       │         │ 10.0 – 10.3      │    1.50    │    1.50     │
       │Mac OS X │ 10.4             │    2.01    │    2.01     │
       │         │ 10.5 (and new)   │    2.60    │    2.50     │
       ├─────────┼──────────────────┼────────────┼─────────────┤
       │FreeBSD  │ 5 (and new)      │    1.50    │    none     │
       ├─────────┼──────────────────┼────────────┼─────────────┤
       │NetBSD   │ 4.0              │    2.60    │    none     │
       │         │ 5.0 (and new)    │    2.60    │    2.60     │
       ├─────────┼──────────────────┼────────────┼─────────────┤
       │         │ 3.8 – 3.9        │    1.02    │             │
       │OpenBSD  │ 4.0 – 4.6        │    1.50    │    none     │
       │         │ 4.7 (and new)    │    2.60    │             │
       ├─────────┼──────────────────┼────────────┼─────────────┤
       │Solaris  │ 7 (and new)      │    1.50    │    1.50     │
       ├─────────┼──────────────────┼────────────┼─────────────┤
       │AIX      │ 5.2 (and new)    │    2.01    │    2.01     │
       └─────────┴──────────────────┴────────────┴─────────────┘
       Note that Windows 98 and Windows Me can read UDF filesystem only from CD and  DVD  optical
       discs, not from hard disks.

   BLOCK SIZE
       In  most  cases,  operating  systems  are unable to mount UDF filesystem if UDF block size
       differs from logical sector size of the device. Typically hard disks have sector size  512
       bytes and optical media 2048 bytes. Therefore UDF block size must match the logical sector
       size of the device.

       Linux kernel prior to  version  2.6.30  used  hardcoded  UDF  block  size  of  2048  bytes
       independently of logical sector size, therefore it was not able to automatically mount UDF
       filesystem if block size differed from 2048. Since 2.6.30 and prior to 4.11  Linux  kernel
       used  a  logical  sector  size  of the device as UDF block size, plus it tried fallback to
       2048. Since 4.11 it uses logical sector size and fallbacks to any valid block size between
       logical   sector   size  and  4096.  Therefore  since  version  2.6.30  Linux  kernel  can
       automatically mount UDF filesystems correctly if UDF block  size  matches  device  logical
       sector  size and since version 4.11 can automatically also mount devices which sector size
       does not match UDF block size. In any case and also for  Linux  kernel  prior  to  version
       2.6.30, different UDF block size (which is not autodetected) can be manually specified via
       bs=blocksize mount parameter.

   WHOLE DISK VS PARTITION
       UDF filesystem is supposed to be formatted on the whole media and not to  the  partitioned
       hard  disk.  Mac  OS  X  systems  enforce  this rule and reject to automatically mount UDF
       filesystem unless it is formatted on the whole unpartitioned hard disk. Possible partition
       table  (e.g.  MBR or GPT) on disk with valid UDF filesystem is ignored. On the other hand,
       Microsoft Windows systems are unable to detect non-removable hard disks without MBR or GPT
       partition  table. Removable disks do not have this restriction. A consequence is that non-
       removable hard disks formatted to UDF by Windows Vista+ are not recognized  by  Mac  OS  X
       systems  and  vice-versa. Note that manual mount of UDF partition on partitioned hard disk
       on  Mac  OS  X  system  is  possible  and  working  (e.g.  by  running   commands:   mkdir
       /Volumes/DriveName  &&  mount_udf  /dev/disk1s1 /Volumes/DriveName). But there is no known
       way to mount an unpartitioned non-removable disk on Windows system.

       Thanks to reserved and unused UDF boot area (first 32kB of UDF filesystem) it is  possible
       to  deal  with  this  problem,  by  putting  MBR  on such non-removable hard disk just for
       compatibility reasons with Windows. Such MBR  table  would  contain  one  partition  which
       starts  at  sector  0 (includes MBR itself) and spans whole disk device. So the whole disk
       device and also the first  partition  on  disk  points  to  same  sectors.  Therefore  UDF
       filesystem  can  be mounted either from whole disk device (needed for Mac OS X systems) or
       from first partition (needed for Microsoft Windows systems).

       Linux kernel ignores MBR table if contains partition which starts at  sector  0.  Normally
       Linux  kernel  can  detect and mount UDF filesystem either on a partition or on whole disk
       device. It does not have any restrictions.

       mkudffs option --bootarea=mbr put such MBR table for compatibility with Microsoft  Windows
       systems into disk when formatting.

   LINUX LABEL BUGS
       In  most cases Logical Volume Identifier is used as UDF label. But Linux libblkid prior to
       version 2.26 used Volume Identifier. Therefore mkudffs --label for  compatibility  reasons
       set both Logical Volume Identifier and Volume Identifier.

       Linux  libblkid  prior  to version 2.30 incorrectly processed non-ASCII identifier strings
       encoded in 8-bit OSTA Compressed Unicode format. Therefore mkudffs since version  2.0  for
       compatibility  reasons  tries  to  encode  a  non-ASCII  identifier strings in 16-bit OSTA
       Compressed Unicode format and then fallbacks to 8-bit format.

       For more information about UDF Label and UUID see udflabel(8) section UDF LABEL AND UUID.

EXIT STATUS

       mkudffs returns 0 if successful, non-zero if there are problems.

LIMITATIONS

       mkudffs cannot create UDF 2.50 Metadata partition,  therefore  it  does  not  support  UDF
       revisions  higher  than 2.01 for non Write Once media yet. So there is no support for Blu-
       ray discs which needs UDF 2.50 (except for Blu-ray Disc Recordable which does not  require
       Metadata partition).

       mkudffs  prior to version 2.2 was unable to process Unicode strings with code points above
       U+FFFF. When option --utf8 was specified then input strings were limited to  3-byte  UTF-8
       sequences  and  when  option  --u16  was specified then input strings were limited just to
       UCS-2BE strings (subset of UTF-16BE).

BUGS

       mkudffs prior to version 1.1 was unable to process non-ASCII  characters  from  identifier
       strings in --utf8 mode, --vsid option was completely broken and --blocksize must have been
       manually specified for hard disks as  default  value  was  hardcoded  for  optical  disks.
       mkudffs prior to version 2.0 generated broken and unreadable cdr disc images.

AUTHOR

       Ben Fennema
       Pali Rohár <pali.rohar@gmail.com>

AVAILABILITY

       mkudffs    is    part    of    the    udftools    package    and    is    available   from
       https://github.com/pali/udftools/.

SEE ALSO

       pktsetup(8), udflabel(8), cdrwtool(1), udfinfo(1), wrudf(1)