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(Documentation for the BASIC Mode=JFS menu)
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(Mode=JFS)


Mode=JFS Menu: [OS/2 and eCS Journaled File System]

Allocation map display

From main menu: Mode=JFS -> Allocation map display

Display a pseudo-graphical map of used versus free sectors in the filesystem

Menu item screenshot(s)


    Display a usage map for the currently selected disk or filesystem

    A pseudo-graphical map of the disk or partition allocation is
    displayed, showing the distribution of data over the object

    This is also an indication for the amount of unused sectors in
    the object, that are beneficial to 'SMART-SECTOR' optimizations
    in imaging and cloning operations.

    The percentage of used sectors are displayed as a percentage at
    the end of the line, and a total usage percentage and size is
    shown just after the map itself.

    For filesystems that support resizing, the limits for resizing
    are shown after the map itself.

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    Press <F1> again for more help; Some options may require switching to 'Expert mode'

   



Set Standard Volume Label

From main menu: Mode=JFS -> Set Standard Volume Label

Display/Edit the standard 11-character label, as used by OS/2 and variants


    This will present a small dialog to display and/or edit the
    standard (IBM) label, with a maximum length of 11-characters
    and located both in the BOOTSECTOR and the SUPERBLOCK

    Both locations are updated simultaneously when editing

    This standard label is used (on OS/2, ArcaOS, eComStation)
    to identify the filesystem in commands like DIR and FORMAT
       - Linux specific label, 16-characters (superblock)
         can be used as identification when mounting

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    Press <F1> again for more help; Some options may require switching to 'Expert mode'

   


Set Volume Serial Number

From main menu: Mode=JFS -> Set Volume Serial Number

Change the volume serial number, making this volume unique (after clone :-)


    This will update the 'volume serial number' in the bootsector

    This could be REQUIRED for some operating systems after cloning
    a filesystem, to make sure the volume serial numbers are unique.

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    Press <F1> again for more help; Some options may require switching to 'Expert mode'

   



Fix Standard IBM Bootsector

From main menu: Mode=JFS -> Fix Standard IBM Bootsector

Write STANDARD (classic IBM) JFS Bootsector from partition+superblock-info


    This will create a new JFS bootsector for the partition, based on
    information from the partition-tables and on information found in
    the superblock for the filesystem.

    The bootsector code used is the STANDARD version, as originally
    supplied by IBM. JFS partitions using this will not be bootable.

    This can be very useful when the bootsector got damaged by a virus
    or a crashing program (writing to sector 0) or if the partition was
    deleted by accident using FDISK or LVM and recreated again.

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    Press <F1> again for more help; Some options may require switching to 'Expert mode'

   


Fix ArcaOS / eCS Bootsector

From main menu: Mode=JFS -> Fix ArcaOS / eCS Bootsector

Write BOOTABLE (ArcaOSn/eCS) JFS Bootsector from partition+superblock-info


    This will create a new JFS bootsector for the partition, based on
    information from the partition-tables and on information found in
    the superblock for the filesystem.

    The bootsector code used is the BOOTABLE version, as supplied with
    ArcaOS and eComStation 2.x to allow booting from JFS partitions.

    Apart from ths specific 'bootable' bootsector, you will also need
    the JFS mini filesystem (mini-FS) in the sectors directly following
    the bootsector itself. If not there yet, you can write that code
    using other selections in this same menu.

    This can be very useful when the bootsector got damaged by a virus
    or a crashing program (writing to sector 0) or if the partition was
    deleted by accident using FDISK or LVM and recreated again, or if
    the partition was CHKDSK'ed by an OLD non-bootable UJFS.DLL ...

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    Press <F1> again for more help; Some options may require switching to 'Expert mode'

   


Fix HiddenSectors/Geo value

From main menu: Mode=JFS -> Fix HiddenSectors/Geo value

Fix bootsector HiddenSectors and geometry fields to match partition tables


    This will update the 'hidden sectors' field in the bootsector
    to match the offset to the partition-table the partition is
    defined in and update the geometry Heads and Sectors field to
    match the current disk geometry.

    This could be REQUIRED for some operating systems like OS/2
    to accept and mount the partition as a driveletter!

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    Press <F1> again for more help; Some options may require switching to 'Expert mode'

   



Set FS Unmounted - Clean

From main menu: Mode=JFS -> Set FS Unmounted - Clean

Update superblock status to indicate filesystem is UNMOUNTED and CLEAN


    This will update the fileystem-status field in the JFS superblock
    to indicate that filesystem is CLEAN, and not mounted.

    This can be useful to avoid an automatic CHKDSK after a system-crash

    Note: The filesystem itself is NOT cleaned in any way, it is just the
          statusflag that is modified.

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    Press <F1> again for more help; Some options may require switching to 'Expert mode'

   


Set FS Mounted - Dirty

From main menu: Mode=JFS -> Set FS Mounted - Dirty

Update superblock status to indicate filesystem is DIRTY


    This will update the fileystem-status field in the JFS superblock
    to indicate that filesystem is DIRTY.

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    Press <F1> again for more help; Some options may require switching to 'Expert mode'

   


Set FS Mounted - Clean

From main menu: Mode=JFS -> Set FS Mounted - Clean

Update superblock status to indicate filesystem is MOUNTED and CLEAN


    This will update the fileystem-status field in the JFS superblock
    to indicate that filesystem is CLEAN, but IS mounted.

    Note: The filesystem itself is NOT cleaned in any way,
          it is just the statusflag that is modified.

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    Press <F1> again for more help; Some options may require switching to 'Expert mode'

   



Display Superblock

From main menu: Mode=JFS -> Display Superblock

Display the SUPERBLOCK structure for the currently selected filesystem


    This will display the contents of the filesystem superblock
    in a textual format matching the current filesystem type.

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    Press <F1> again for more help; Some options may require switching to 'Expert mode'

   


Analyse JFS filesystem

From main menu: Mode=JFS -> Analyse JFS filesystem

Check filesystem for inconsistencies and errors (Readonly, no fixing!)


    This will perform a CHECK of the filesystem, somewhat like the
    well-known CHKDSK but without automatically fixing anything.

    The result of the check is a sector-lookup-table (SLT) that contains
    information about all recognized filesystem areas that are in use.

    Any error recognized will be flagged in the default display of
    this SLT that is performed automatically by the CHECK command.

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    Press <F1> again for more help; Some options may require switching to 'Expert mode'

   



Reselect whole disk, FDISK

From main menu: Mode=JFS -> Reselect whole disk, FDISK

Unselect filesystem, reselect the same/first disk; enables Mode=FDISK menu


    This will UNSELECT the current object/filesystem, and reselect a
    whole physical disk, either the same disk as the partition was on,
    or the first disk present in other cases.

    This is a quick way to change to 'Mode=FDISK' and work on
    disk-level issues

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    Press <F1> again for more help; Some options may require switching to 'Expert mode'

   



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(to DFSee main pages)  |  File  |  Edit  |  Actions  |  Image  |  View  |  Scripts  |  Set  |  Help  |  (to EXPERT menu)
Mode=FDISK  |  APFS  |  AUX  |  DUMPFS  |  EXTn  |  EFAT  |  FAT  |  HFS+  |  HPFS  |  ISO  |  JFS  |  NTFS  |  REISER  |  SWAP  |  XFS
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