# fsck command

The fsck command completes a more thorough check of the integrity and
 structure of your data than the save command. It also allows for fixing
 backward link errors automatically. This TCL command was implemented to allow its use without
 first entering the D3 Windows Monitor Debugger.

## Syntax

```
 fsck -f filename -c arg
```

## Parameter(s)

| filename | Represents the name of the file that you want to check. |
| --- | --- |
| arg | Represents one of two options available for checking the filename. No (default) Fix |

## Description

The fsck command provides a simple interface to the FlashBASIC
 %filecheck() function and is used to verify the integrity of the data within
 the D3 database. The fsck command allows for a more thorough scan of the data
 than the save command.

 Note: When fsck is run from the Monitor Debugger at the same time as the file
 is being resized, a file is being resized message is displayed. This message is
 not displayed when fsck is run from TCL.

 By contrast, and to provide for a better experience with data backups, using the
 save command only provides a minimal check to ensure that data will be saved
 properly, and then restored properly. The save command is optimized to save
 the data more quickly. To achieve this, not all data integrity or structures are checked.
 However, when using the fsck command, checks are included for backward link
 errors and embedded segment marks.

## See also

- [%filecheck() function](https://d3codex.com/pickbasic-flashbasic/percent-filecheck-function/)

---
Source: https://d3codex.com/tcl/fsck-command/ - part of the D3Codex reference.