Filesystem analysis

Directory and file view

The filesystem content view is split into left and right sides. The left side shows the directory tree, and the right shows files in the selected directory. The files are color-coded according to the validation result (see below). You can mark specific files and directories for copying.

Scan control

The progress screen shows the number of files and directories discovered so far. You can Pause the scan before it is complete to look at what the scan has found. The Pause command is unavailable for:

• FAT16, FAT32, and exFAT filesystems. The scan does pause but no output related to these filesystem is displayed. You need to wait till the end of the scan. As media using FAT and exFAT are normally small, this is usually not a long wait.
• For ZFS scan, the Pause button is not available. This is because of memory usage limitations. Most of the intermediate results are discarded to save memory, and the scan is not designed to be paused. You have to wait for it to complete.

Validation

When the scan is complete or when you pause the scan, Klennet Recovery starts examining file contents to determine if the contents are valid.

You do not need to wait for validation to complete before copying the files.

Important: The validation results are not precise. This is because:

• validation may miss some damage because it does not check every byte in every file;
• validation only covers a limited set of file formats;
• some files may have extensions mismatched to the file format (for example, a PNG file with a JPEG extension).

Understanding validation statistics

The filesystem analysis window shows the aggregate validation statistics in the toolbar. There are two aggregate metrics:

The first one tells you how many (or what percentage) of files check out good (of all the known file types). A higher percentage indicates better recovery quality.

The second metric tells you how many files are of the known formats. The toolbar again shows you the number of files and the percentage. A higher percentage indicates better reliability of the first metric.

Aggregate validation results.
The first line indicates how good the recovery quality is.
The second line indicates how reliable the first line indication is.

Individual file validation cues

The file list displays files in color according to the validation status:

• gray - not yet evaluated;
• black - unsupported file format;
• green - valid file;
• red - damaged file;
• magenta - on BTRFS, the chunk entry corresponding to the file data is missing.

Selecting and deselecting files

You can select files to copy by checking the appropriate checkboxes on anything from top-level filesystem directories down to individual file versions.

You can also select multiple files matching some criteria using the Mark button on the toolbar. Selection criteria include file name, minimum and maximum file size, and file version (where versions are available).

Selecting and copying multiple versions of files

On some of the supported filesystems, Klennet Recovery can recover multiple versions of the same file.

If you select everything by checking the top-level filesystem directory, all the versions will be selected and copied. The same applies if you use Copy - All button on the toolbar. The latest (most recent) version has the regular file name (filename.dat), and the previous versions are numbered (filename (1).dat), with older versions having higher numbers.

To select only the latest versions of the files, use the Mark button on the toolbar and set File versions to Select the latest version. This will select the latest versions where several versions are available.

File name lists

You can export the file list in CSV format, import it into your favorite spreadsheet tool, and look through it. Furthermore, you can remove some lines from the file and then import the file back. This will select or deselect the files remaining in the file. The intended use of this feature is to facilitate file selection in complex situations. You can only import the file you exported in the same recovery window.

Copying files

Use the corresponding toolbar button to copy all files or just the selected files. You will need to enter the target path. If you need to recover files to a network share, please look at this page. If there are two recovered files with the same name or if the target directory is not empty, the new files are renamed.