(Documentation for the BASIC Mode=APFS menu)

Mode=APFS Menu: [APFS container File System]

Select container Volume

Select one of the Volumes present in the APFS container, by number or name

   This submenu lists all the identified Volume names in
   the filesystem, so you can select one for further use.

   An APFS filesystem can have more than one volume, that all share
   the same pool of available freespace in the whole partition.

   Selecting a Volume will make that the ACTIVE volume, for which you
   can display the volume relevant information, and browse its contens

   On opening an APFS partition the FIRST volume (0) will be ACTIVE

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

   

Refresh to last checkpoint

Refresh by finding the latest checkpoint and superblock (highest Xid value)

   This refreshes the FS-view to the most recent CHECKPOINT

   This will re-read the master-superblock, then iterate over all the
   checkpoints present (usually hundreds) and select the Checkpoint-Map
   and associated superblock with the highest transaction-ID (Xid value)

   A checkpoint is a set of filesystem structures, representing a
   consistent view on the filesystem at one specific point in time.

   When the filesystem is still MOUNTED by the operating system, there
   may have been new transactions (changes) that are NOT reflected in
   the latest checkpoint yet. In that case the container is UNSTABLE
   and not all operations may work reliably.

   Refreshing just before performing an operation may help in that case

   When the filesystem is UNMOUNTED, and STABLE, there is no need
   to refresh, since there will be no new checkpoints created ...

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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'

   

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