Documentation update
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
diff --git a/HOWTO b/HOWTO
index 7db02b1..b284c42 100644
--- a/HOWTO
+++ b/HOWTO
@@ -346,7 +346,9 @@
limited by other options (such as 'runtime', for instance).
Unless specific nrfiles and filesize options are given,
fio will divide this size between the available files
- specified by the job.
+ specified by the job. If not set, fio will use the full
+ size of the given files or devices. If the the files
+ do not exist, size must be given.
filesize=int Individual file sizes. May be a range, in which case fio
will select sizes for files at random within the given range