In the beginning of the Book we created the directory /data and the subdirectory /data/world-writable.

[root] # /usr/bin/chimera ls /data/
total 3
drwxr-xr-x  3 0 0 512 Jul 23 14:59 .
drwxrwxrwx  3 0 0 512 Jul 24 14:33 ..
drwxrwxrwx 12 0 0 512 Jul 24 14:41 world-writable

Now, we create the directory data/write-token into which we want to write

[root] # /usr/bin/chimera mkdir /data/write-token
[root] # /usr/bin/chimera 777 chmod /data/write-token
[root] # /usr/bin/chimera ls /data/
total 4
drwxr-xr-x  4 0 0 512 Aug 09 12:48 .
drwxrwxrwx  3 0 0 512 Jul 24 14:33 ..
drwxrwxrwx 12 0 0 512 Jul 24 14:41 world-writable
drwxrwxrwx  2 0 0 512 Aug 09 12:48 write-token

and echo the space reservation into the WriteToken tag.

[root] # /usr/bin/chimera writetag /data/write-token WriteToken [10000]