FileSystemsStressTest
                    Copyright 2023-2024 by Union Systems
                         Developed by Piotr Drapich
                      
                        web page: www.union.pl/fsst
                        email support: fsstunion.pl
 

FileSystemStressTest is a tool that was created primarily to help in pfs3aio
filesystem development as a stress test suite. It can also be used to detect 
and diagnose software or hardware issues that result in file content corruption,
such as incorrect MaxTransfer settings, faulty drivers, disks or controllers.
Finally, FileSystemStressTest can also be used to clear sensitive data from
disks.
  
FileSystemStressTest generates test files in the specified path, customized 
with given parameters and verifies their content by calculating and comparing 
hashes of each generated file before and after saving it to disk.
Test files have randomly generated content, initialized with specified seed and 
they will take up a specified amount of disk space, with randomly generated 
file sizes between the specified minimal and maximal values. Created test files
are removed after verification.
If option -% is specified, FileSystemStressTest can also simulate file
operations peformed by an application. The given percentage of generated test
files will be randomly selected for deletion, then regenerated and validated. 
The size of each regenerated file will be kept within specified range so the
total size of regenerated files will be the same as the total size of all
removed files.
FileSystemStressTest can be set to perform multiple iterations of the process, 
described above.

FileSystemStressTest features:
- configurable destination path, where all files will be generated
- configurable filename prefix, so multiple instances of FileSystemStressTest
  can generate and validate files in the same directory
- configurable total volume of files to generate
- configurable minimum and maximum size of a single file. The actual file
  size will be randomly generated to be between these two values
- configurable initial random generator seed, used to generate file contents
- configurable work buffer size, used to generate and validate files
- option to keep generated files in the destination path
- configurable verbose level
- configurable number of iterations
New in version 1.1:
- faster random number generator (sfc)  used
- configurable percent of generated files to be removed, regenerated and
  validated in each iteration.
- option to disable generation of random file sizes
- option to configure fill value to be used instead of random values
- option to force filling up the whole volume.


See ReadMe.txt for detailed information on parameters, usage and examples.

PERMISSION  UID  GID    PACKED    SIZE  RATIO METHOD CRC     STAMP     NAME
---------- ----------- ------- ------- ------ ---------- ------------ ----------
[unknown]                16827   27544  61.1% -lh5- d940 Jan 12  2024 FileSystemStressTest
[unknown]                 2725    7829  34.8% -lh5- 3c7a Jan 12  2024 ReadMe.txt
---------- ----------- ------- ------- ------ ---------- ------------ ----------
 Total         2 files   19552   35373  55.3%            Jul 11 01:41