(Documentation for the BASIC Mode=EXTn menu)

Mode=EXTn Menu: [Linux EXT2 or EXT3/4 jrnl File System]

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'

   

Alloc map, by Blockgroup

Show allocation map, with exactly one line per Blockgroup in an aligned view

    Show allocation map, with exactly one line per Block-Group

    Because the allocation bitmap is displayed perfectly aligned with the
    Blockgroups, the distrubution of (meta)data over these groups becomes
    quite visible

    The diplay could become quite large for huge filesystems

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

   

Set LinuxMnt Volume Label

Display/Edit the standard 16-character label in the superblock (for mount)

    This will present a small dialog to display and/or edit the
    Linux specific label, with a maximum length of 16-characters
    and located in the SUPERBLOCK

    This Linux label is used (on Linux) to identify the filesystem
    when mounting, instead of a devicename like /dev/sda1 or the
    cryptic UUID

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

   

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 EXT 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

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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Created by Jan van Wijk:   Aug 2007, last update:   23-Oct-2022