1 .. SPDX-License-Identifier: GPL-2.0
2
3 ===============
4 UDF file system
5 ===============
6
7 If you encounter problems with reading UDF dis
8 please report them according to MAINTAINERS fi
9
10 Write support requires a block driver which su
11 dvd+rw drives and media support true random se
12 filesystem on such devices can be directly mou
13 media however, does not support this. Instead
14 for packet mode using the utility cdrwtool, th
15 be bound to the underlying cd device to provid
16 and read-modify-write cycles to allow the file
17 while providing the hardware with only full pa
18 required for dvd+rw media, use of the pktcdvd
19 performance due to very poor read-modify-write
20 by drive firmware.
21
22 ----------------------------------------------
23
24 The following mount options are supported:
25
26 =========== ======================
27 gid= Set the default group.
28 umask= Set the default umask.
29 mode= Set the default file p
30 dmode= Set the default direct
31 uid= Set the default user.
32 bs= Set the block size.
33 unhide Show otherwise hidden
34 undelete Show deleted files in
35 adinicb Embed data in the inod
36 noadinicb Don't embed data in th
37 shortad Use short ad's
38 longad Use long ad's (default
39 nostrict Unset strict conforman
40 iocharset= Set the NLS character
41 =========== ======================
42
43 The uid= and gid= options need a bit more expl
44 decimal numeric value and all inodes on that m
45 belonging to that uid and gid. Mount options
46 The forget option causes all IDs to be written
47 of UDF standard to indicate that IDs are not s
48
49 For typical desktop use of removable media, yo
50 the interactively logged on user, and also spe
51 the interactive user will always see the files
52
53 The remaining are for debugging and disaster r
54
55 ===== ======================
56 novrs Skip volume sequence r
57 ===== ======================
58
59 The following expect a offset from 0.
60
61 ========== ======================
62 session= Set the CDROM session
63 anchor= Override standard anch
64 lastblock= Set the last block of
65 ========== ======================
66
67 ----------------------------------------------
68
69
70 For the latest version and toolset see:
71 https://github.com/pali/udftools
72
73 Documentation on UDF and ECMA 167 is available
74 - http://www.osta.org/
75 - https://www.ecma-international.org/
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