197:
when it comes to simply sharing data on a FAT disk volume between Linux and other operating systems such as
Windows. Its data structures are the same as those used by Windows for VFAT long filenames, and it does not require running a synchronization utility in order to prevent Windows and Linux data
176:
out of the three is that it provides full Unix file semantics. Therefore, it can be used in situations where it is desirable to install Linux on and run it from a FAT disk volume, which require such semantics to be available. However, Linux installed on and running from such a disk volume is slower
94:
The UMSDOS project was started in 1992 by
Jacques Gelinas and made available to the net in January 1994 as a patch. It was included in the standard distribution starting with kernel 1.1.36. UMSDOS was removed from the Linux 2.6.11 kernel for lack of maintenance. UVFAT, an extension of UMSDOS to use
393:
semantics. It is possible for the filesystem drivers to convert the newline conventions in files, between LF termination and CRLF termination, on the fly as files are read and written. By default this conversion is entirely disabled. The filesystem drivers can perform conversion for some files,
146:
filesystem driver provides no extra Unix file semantics and no long filename support. If a FAT disk filesystem is mounted using this driver, only 8.3 filenames will be visible, no long filenames will be accessible, nor will any long filename data structures of any kind on the disk volume be
134:. The filesystem drivers are mutually exclusive. Only one can be used to mount any given disk volume at any given time. Thus the choice among them is determined by what long filenames and Unix semantics they support and what use one wants to make of the disk volume.
181:
filesystem format. Further, unless a utility program is regularly run every time that one switches from running
Windows to running Linux, certain changes made to files and directories on the disk by Windows will cause error messages about inaccessible files in Linux.
468:
files in directories if they do not already exist, resulting in such a file in every directory in the disc volume. When switching between
Windows and Linux this behaviour is not often considered desirable. Therefore, the normal mode of operation when invoking
602:
Although the filesystem drivers in the kernel make it possible to access files and directories on FAT formatted volumes in the normal manner, it is also possible to do so without kernel driver support, using the utility programs that form the
266:
As mentioned previously, all of the Linux filesystem drivers support all of the three File
Allocation Table sizes, 12-bit, 16-bit, and 32-bit. Other common features that they all support are various Linux mounting options (specified with the
163:
filesystem driver provides long filename support, and extra Unix file semantics. However, it does so using on-disk data structures that are not recognized by any filesystem drivers for any operating systems other than Linux.
444:
driver's extra abilities, it is necessary to create that file in the directory and synchronize its internal data with the normal FAT data for any existing entries already in the directory. This is done with a tool called
575:
The installation of Linux into such a directory in the first place simply involves unpacking files from an archive into that directory and its subdirectories. Such an installation also generally requires the use of a
424:
FAT filesystem driver stores all of the extra information relating to Unix file semantics in what, to another FAT filesystem driver, appears to be just a normal file in each directory and subdirectory, named
193:, although lacking full Unix file semantics and lacking the ability to have Linux installed on and running from a FAT disk volume, does not have the aforementioned disadvantages of
493:
permits installing Linux on, and then bootstrapping and running it from, a FAT format disc volume. The advantage of this is that it permits the use of Linux on a computer where
1219:
394:
attempting to auto-detect what files to convert based upon the extension portion of the filename, or globally for all files. These three conversion levels are specified as
452:
This is the utility program that is run, across every directory on the disc volume, every time that one switches from running
Windows to running Linux, in order for the
130:
structure of the original FAT filesystem format, and in the provision of Unix file semantics that do not exist as standard in the FAT filesystem format such as
294:) owner user ID and group ID to be a single, specified, value for all files in the volume. Both IDs are specified as numeric values (as to be found in the
71:
to permit installation of Linux on a FAT disc volume. A few distributions do, however. These include distributions such as Phat Linux, which installs in
198:
structures from becoming disjointed. For this reason, it is the most appropriate of Linux's FAT filesystem drivers to use in the majority of situations.
1224:
1198:
406:(for "text"), respectively. The latter two options carry an inherent risk of corrupting non-text file data. No conversion at all is the default.
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after switching from
Windows to Linux (which is usually done by running the tool at Linux boot time from a startup script) is to employ the
517:
95:
the
Windows data structures for long filenames instead of its own, was discontinued before release. They should work in 2.4.x kernels.
906:
950:
1124:
611:
FAT filesystem driver, mountlo provides long filename support using the same disc data structures that
Microsoft Windows uses.
456:
filesystem driver to incorporate any changes made to files and directories by
Windows into its private data structures in its
641:
1165:
1214:
440:
filesystem driver does for the directory: only 8.3 filenames and no extra Unix file semantics. To enable the
323:
on FAT12/FAT16 volumes as implemented in various operating systems of the Digital Research family, including
1100:
942:
320:
159:
long filename support on FAT format volumes, but it does not support any extra Unix file semantics. The
1173:
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38:
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for Linux, however this is related to the desire not to repartition the hard disc and unrelated to the
973:
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filesystem driver that all files and directories are to have owner ID 745 and group ID 15, the
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filesystem driver provides long filename support using the same disk data structures that
969:
Linux bible: boot up to Ubuntu, Fedora, KNOPPIX, Debian, SUSE, and 11 other distributions
67:
Most of the major Linux distributions, including RedHat, SuSE, and Debian, do not employ
626:
A modern equivalent of UMSDOS is POSIX Overlay Filesystem (posixovl). It works in FUSE.
177:
than Linux installed on and running from a disk volume formatted with, for example, the
757:
581:
513:
344:
1128:
1208:
895:
348:
123:
615:
273:
127:
43:
524:. The various Linux top-level directories are thus, to DOS, directories such as
290:
These two options tell the filesystem driver to set the (default, in the case of
80:
556:
to all pathnames. The location of the Linux root directory is supplied to the
1005:. The Complete Linux Kit, Rainer Maurer (3rd ed.). Springer. p. 43.
367:
to apply globally to all files in the volume. For example, to specify to the
332:
34:
432:
In the absence of this file in any given directory, and thus by default, the
1142:
1067:
638:(DoubleSpace/DriveSpace/Stacker compatible compressed FAT volumes for Linux)
577:
41:(FAT) filesystem format. These are commonly known by the names used in the
1161:
371:
filesystem driver that no "group" or "other" access is to be allowed, the
321:
world/group/owner access permissions for read/write/delete/execute rights
88:
76:
884:
861:
110:
All of the Linux filesystem drivers support all three FAT types, namely
506:
352:
336:
328:
99:
17:
635:
604:
597:
340:
324:
1063:
Multi-operating system networking: living with Unix, Netware, and NT
315:
Linux filesystem drivers do not at present incorporate support for
1193:
364:
119:
115:
111:
30:
178:
156:
497:
is already installed, without requiring that the hard disc be
494:
477:
option to the command, which prevents the creation of any new
907:
The Linux/Windows combo: Use these resources to make it work
618:
filesystem drivers may be used—FatFuse, FuseFat or mountlo.
505:
in such a scenario. Instead DOS is first bootstrapped, and
560:
filesystem driver in the first place via an option to the
512:
The convention for such an installation is for the Linux
1199:
New Linux patch could circumvent Microsoft's FAT patents
122:. Where they differ is in the provision of support for
481:
files in directories that do not already possess them.
255:
Can host Linux; may need maintenance when switching OS
592:
Accessing FAT formatted volumes without kernel support
516:
to be a subdirectory of the root directory of the DOS
436:
filesystem driver provides the same semantics as the
296:
47:
command to invoke particular drivers in the kernel:
509:or linld is used to then bootstrap Linux from DOS.
1032:Making Linux work: essential tips & techniques
98:Earlier Linux distributions which used UMSDOS are
710:How Linux works: what every superuser should know
671:
669:
667:
665:
663:
661:
659:
657:
1035:. 1001 Tips Series. Cengage Learning. pp.
570:loadlin c:\linux\boot\vmlinuz rw root=c:\linux
676:Stanfield, Vicki; Smith, Roderick W. (2002).
568:would be invoked with a command line such as
552:filesystem driver automatically prepends the
501:. Linux is not bootstrapped directly from a
8:
1003:Linux, unleashing the workstation in your PC
838:"Summary of changes from v2.6.10 to v2.6.11"
319:on FAT12/FAT16/FAT32 volumes and multi-user
241:Uses same data structures that Windows uses
1099:. Essential Guide to Linux (4th ed.).
680:. Craig Hunt Linux library (2nd ed.).
300:file). So, for example, to specify to the
1220:File systems supported by the Linux kernel
200:
1024:
1022:
932:
930:
928:
926:
924:
922:
920:
918:
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914:
1001:Strobel, Stefan; Elling, Volker (1997).
797:
795:
793:
791:
789:
787:
785:
783:
781:
745:
743:
741:
739:
737:
735:
733:
653:
1182:
1171:
703:
701:
753:The multi-boot configuration handbook
7:
27:Widely used Linux filesystem format
1066:. Auerbach Best Practices Series.
862:"UMSDOS filesystem: UVFAT support"
102:, Monkey Linux and Winlinux 2000.
25:
1225:Free special-purpose file systems
808:. Open source technology series.
1160:Gelinas, Jacques (2001-12-01).
311:mount -t vfat -o uid=745,gid=15
1:
805:Integrating Linux and Windows
642:Design of the FAT file system
1125:"FUSE: NonNativeFileSystems"
375:command would be invoked as
308:command would be invoked as
1166:Linux Documentation Project
966:Negus, Christopher (2007).
750:Smith, Roderick W. (2000).
678:Linux system administration
564:command. So, for example,
79:and is booted by running a
1241:
1143:"POSIX Overlay Filesystem"
937:Roderick W. Smith (2005).
712:. No Starch Press Series.
595:
588:filesystem driver per se.
378:mount -t vfat -o umask=077
607:utility suite. Like the
402:(for "auto-detect"), and
939:Linux in a Windows world
622:POSIX overlay filesystem
614:Alternately, one of the
485:Installing Linux on FAT
317:file/directory passwords
1194:UMSDOS developer’s page
1060:Rajagopal, Raj (2000).
460:file. By default, the
391:file content conversion
1181:Cite journal requires
1029:Danesh, Arman (2002).
896:Monkey Linux Explained
548:), and so forth. The
389:This option specifies
75:on DOS by unpacking a
802:McCune, Mike (2001).
596:Further information:
363:This option sets the
351:, System Manager and
172:The key advantage to
39:File Allocation Table
1101:O'Reilly Media, Inc.
1095:Welsh, Matt (2003).
943:O'Reilly Media, Inc.
708:Ward, Brian (2004).
974:John Wiley and Sons
756:. Handbook Series.
682:John Wiley and Sons
227:8.3 filenames only
210:Unix file semantics
63:History and support
503:Volume Boot Record
106:Feature comparison
1215:Disk file systems
1110:978-0-596-00272-5
1081:978-0-8493-9831-5
1046:978-1-884133-78-7
1012:978-0-387-94880-5
987:978-0-470-08279-9
823:978-0-13-030670-8
810:Prentice Hall PTR
771:978-0-7897-2283-6
723:978-1-59327-035-3
691:978-0-7821-4138-2
259:
258:
153:Microsoft Windows
147:maintained. The
16:(Redirected from
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1147:
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1132:
1127:. Archived from
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1016:
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972:. Bible Series.
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866:linux.voyager.hr
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398:(for "binary"),
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132:file permissions
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37:drivers for the
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1234:
1233:
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1162:"UMSDOS HOW-TO"
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1154:Further reading
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885:MuLinux Project
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714:No Starch Press
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684:. p. 166.
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1183:|journal=
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1131:on 2015-09-15.
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758:Que Publishing
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716:. p. 41.
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651:
649:
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628:
623:
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593:
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582:swap partition
580:rather than a
514:root directory
489:As mentioned,
486:
483:
417:
416:Data structure
414:
412:
409:
408:
407:
387:
382:
361:
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345:Concurrent DOS
288:
271:option to the
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207:Long filenames
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124:long filenames
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26:
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1103:p. 405.
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1097:Running Linux
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262:Commonalities
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126:, beyond the
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92:
90:
83:script named
82:
78:
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62:
60:
58:
54:
50:
45:
40:
36:
32:
19:
1201:by Ryan Paul
1174:cite journal
1137:
1129:the original
1119:
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1090:
1062:
1055:
1031:
1002:
996:
968:
961:
938:
902:
891:
880:
869:. Retrieved
865:
856:
845:. Retrieved
841:
832:
804:
762:256, 341–342
752:
709:
677:
625:
613:
608:
601:
585:
574:
557:
549:
542:C:\LINUX\LIB
534:C:\LINUX\BIN
526:C:\LINUX\ETC
511:
490:
488:
479:--LINUX-.---
466:--LINUX-.---
458:--LINUX-.---
453:
451:
441:
437:
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431:
427:--LINUX-.---
421:
419:
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368:
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143:
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128:8.3 filename
109:
97:
93:
68:
66:
56:
52:
48:
33:has several
29:
1070:. pp.
976:. pp.
812:. pp.
760:. pp.
518:boot volume
297:/etc/passwd
81:COMMAND.COM
1209:Categories
871:2015-07-16
847:2017-11-15
648:References
333:Novell DOS
277:command):
35:filesystem
1068:CRC Press
578:swap file
554:C:\LINUX\
204:FS-Driver
155:uses for
85:LINUX.BAT
630:See also
522:C:\LINUX
213:Comment
89:ZipSlack
77:ZIP file
1164:. 1.2.
566:loadlin
562:loadlin
520:, e.g.
507:loadlin
471:umssync
462:umssync
447:umssync
353:REAL/32
337:OpenDOS
329:PalmDOS
100:MuLinux
73:C:\PHAT
1107:
1078:
1043:
1009:
984:
949:
820:
768:
720:
688:
636:DMSDOS
605:mtools
598:mtools
586:umsdos
558:umsdos
550:umsdos
491:umsdos
454:umsdos
442:umsdos
434:umsdos
422:umsdos
411:umsdos
404:conv=t
400:conv=a
396:conv=b
341:FlexOS
325:DR-DOS
292:umsdos
246:umsdos
195:umsdos
174:umsdos
168:umsdos
161:umsdos
87:, and
69:umsdos
57:umsdos
55:, and
18:UMSDOS
1072:25–21
544:(for
536:(for
528:(for
438:msdos
373:mount
365:umask
359:umask
306:mount
274:mount
218:msdos
144:msdos
138:msdos
120:FAT32
116:FAT16
112:FAT12
49:msdos
44:mount
31:Linux
1187:help
1105:ISBN
1076:ISBN
1041:ISBN
1007:ISBN
982:ISBN
947:ISBN
818:ISBN
766:ISBN
718:ISBN
686:ISBN
616:FUSE
609:vfat
546:/lib
538:/bin
530:/etc
420:The
385:conv
369:vfat
302:vfat
284:and
232:vfat
191:vfat
186:vfat
179:ext2
157:VFAT
149:vfat
142:The
118:and
53:vfat
978:159
814:7–9
540:),
532:),
495:DOS
286:gid
282:uid
252:Yes
249:Yes
235:Yes
1211::
1178::
1176:}}
1172:{{
1074:.
1039:.
1037:19
1021:^
980:.
941:.
913:^
864:.
840:.
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780:^
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732:^
700:^
656:^
572:.
475:-c
449:.
429:.
347:,
343:,
339:,
335:,
331:,
327:,
269:-o
238:No
224:No
221:No
114:,
91:.
59:.
51:,
1189:)
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