fsx(8)fsx(8)Namefsx - file system exerciser
/usr/field/fsx [ -h ] [ -ofile ] [ -tn ] [ -fpath ] [ -pm ]
The exerciser exercises a file system by spawning up to 250 (the
default is 20) processes that create, open, write, close, open, read,
validate, close, and unlink a test file. These test files are created
in (the default) unless the -fpath option is used. The exerciser will
run until or kill -15 pid is sent to the process.
A logfile is made in for you to examine and then remove. If there are
errors in the logfile, make sure you check the file, because that is
where the driver and kernel error messages are saved.
The options are:
-h Print the help messages for the command.
-ofile Save the output diagnostics in file.
-tn Run time in minutes (n). The default is to run until the
process receives a or a kill -15 pid.
-pm Number (m) of processes to spawn. The maximum is 250; the
default is 20.
-fpath Path name of directory on file system you wish to test. For
example, or The default is
The following example runs 10 processes on until the process receives a
or kill -15 pid:
% /usr/field/fsx -p10 -f/mnt
The following example runs 20 processes on for 120 minutes in the back‐
% /usr/field/fsx -t120 &
If there is a need to run a system exerciser over an NFS link or on a
diskless system there are some restrictions. For exercisers that need
to write into a file system, such as the target file system must be
writable by root. Also the directory, in which any of the exercisers
are executed, must be writable by root because temporary files are
written into the current directory. These latter restrictions are
sometimes difficult to overcome because often NFS file systems are
mounted in a way that prevents root from writing into them. Some of
the restrictions may be overcome by copying the exerciser to another
directory and then executing it. Avoid using the exerciser over an NFS
or diskless file system.
Guide to System Exercisers