More documentation updates

[fio.git] / HOWTO

diff --git a/HOWTO b/HOWTO
index 2be845c4add2f7ce6c7cebc4d95ca9ce9083622a..536e370ba03f0c5f3c9d3d8fc03ddd559c0cc95b 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -314,7 +314,8 @@ filesize=int        Individual file sizes. May be a range, in which case fio
 
 fill_device=bool Sets size to something really large and waits for ENOSPC (no
                space left on device) as the terminating condition. Only makes
-                sense with sequential write.
+                sense with sequential write. For a read workload, the mount
+               point will be filled first then IO started on the result.
 
 blocksize=int
 bs=int         The block size used for the io units. Defaults to 4k. Values