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The Vfat-os2.ifs driver installs support for the Windows Vfat file system. You need also following drivers installed: Vfat_lw.exe and Mwdd32.sys :Note. The Vfat-os2.ifs includes also support for the Linux ext2 file system. To enable it you need to add BASEDEV=EXT2FLT.FLT to your config.sys file.

IFS=C:\OS2\fs\Vfat\Vfat-os2.ifs parameters

Parameters:

All parameters are case insensitive and you can use a "/" instead of the "-". Use any logically combination of the parameters.

• -q

  This parameter turns off the banner during boot up.

• -VFAT:value

  Specifies which VFAT partition should be supported.
  Value can be * , one or more drive letters or one or more drive letters with a plus sign .
  To use all recognized FAT partition as VFAT you need to add this: -VFAT:*
  To use a list of recognized FAT partition as VFAT you need to add the driver letters to the -VFAT: parameter. For example use drive E and F as Vfat use this option: -VFAT:EF
  To force a FAT partition as VFAT when not automatically recognized add a plus sign after the drive letter: -VFAT:E+

• -cache:value

  The cache parameter sets up the maximum disk cache size. This value is the maximum amount of physical memory Vfat-os2.ifs can dynamically allocate for the disk cache.
  Value can be in the range from 240 to the value of the installed RAM .
  This value is expressed in Kbytes.
  If this parameter is not set it defaults to 240 .

• -rw

  Use this parameter if you want to have write access to the disk.
  If this parameter is not set you have only read access to the disk.

  note: You can also use the vfat-os2.exe program to enable a limited write access.

• -no_auto-fsck

  Only available with ext2flt.flt .
  Prevents vfat-os2 from forcing Linux to run e2fsck on partitions "touched" by OS/2.
  The default is to force Linux to run e2fsck.

• -case_retensive

  ext2flt.flt .
  This option makes the ext2 file system behave like HPFS. With this option set you can access a file by the name of the file no matter what case you use.
  The default is case sensitive. That means that you can access a file only if you use the right case.

• -IFS trace entry point

  Traces one or more specific IFS entry points. Vfat-os2.exe generates than an output whenever the specified entry point is entered.An example of this parameter would look like this:

  IFS=vfat-os2.ifs -FS_Copy -FS_Delete

  Here is a list of the available entry points:

  • FS_AllocatePageSpace

  • FS_ChDir

  • FS_ChgFilePtr

  • FS_Close

  • FS_Commit

  • FS_Copy

  • FS_Delete

  • FS_DoPageIO

  • FS_Exit

  • FS_FileAttribute

  • FS_FileInfo

  • FS_FindClose

  • FS_FindFirst

  • FS_FindFromName

  • FS_FindNext

  • FS_FlushBuf

  • FS_FsInfo

  • FS_IOCtl

  • FS_MkDir

  • FS_Mount

  • FS_Move

  • FS_NewSize

  • FS_OpenCreate

  • FS_OpenPageFile

  • FS_PathInfo

  • FS_ProcessName

  • FS_Read

  • FS_RmDir

  • FS_ShutDown

  • FS_Write

• -no_strat2

  Use this option to turn off the extended I/O operations. Turn the extended I/O only off, if you have any problems with it. If you use Os2dasd.dmd as your block device driver it should work fine.
  If this parameter is not set up, the default is to use the extended I/O on every fixed disk.

• -errors=value

  Here you can set up what vfat should do when it finds an error in the file system.

  Value can be panic or continue .
  If set to panic the system will halts immediately. You must boot Windows/Linux to repair your file system.
  Use the continue option to go on with your work after an error where detected. Ext2 marks this partition as bad and forces Linux to run e2fsck on the next Linux reboot.

• -output=comport

  Redirect the ext2 messages to the specified comport. It is only necessary for tracing or debugging

  Comport can be com1 or com2 .

• -tz=value

  ext2flt.flt .
  Specifies the timezone in minutes from UTC (GMT). This parameter is used to have the same date and time for files as Linux.

  Value can be in the range from -1440 to +1440 .
  0 is the same as GMT.

• -force_strat2:drive-number

  Vfat normally use extended disk I/O only on fixed disk, but not on removable media. With this option set removable media can use extended disk I/O, if available. This will improve your performance. But you must first use the unmount.exe utility before you can remove the drive.
  Drive-number can be in the range from 0 to 26 . A "0" for the drive-number means drive "A", a "1" means drive "B" and so on.

Platform Support:

OS/2 2.x	OS/2 3.0	OS/2 4.0
Yes	Yes	Yes