Android: Fix the build of the 'sg' engine

[fio.git] / HOWTO.rst

diff --git a/HOWTO.rst b/HOWTO.rst
index 2c6c6dbe5cc7bcfd586e0439dd1d526233daaf76..e89d05f04791d22d9369aa9466b48d5e86dfc1ab 100644 (file)
--- a/HOWTO.rst
+++ b/HOWTO.rst
@@ -1129,7 +1129,14 @@ I/O type
                                Random mixed reads and writes.
                **trimwrite**
                                Sequential trim+write sequences. Blocks will be trimmed first,
-                               then the same blocks will be written to.
+                               then the same blocks will be written to. So if ``io_size=64K``
+                               is specified, Fio will trim a total of 64K bytes and also
+                               write 64K bytes on the same trimmed blocks. This behaviour
+                               will be consistent with ``number_ios`` or other Fio options
+                               limiting the total bytes or number of I/O's.
+               **randtrimwrite**
+                               Like trimwrite, but uses random offsets rather
+                               than sequential writes.
 
        Fio defaults to read if the option is not specified.  For the mixed I/O
        types, the default is to split them 50/50.  For certain types of I/O the