Update documentation on zero_buffers / scramble_buffers
Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/HOWTO b/HOWTO
index 725214f..0f9c0fc 100644
--- a/HOWTO
+++ b/HOWTO
@@ -519,6 +519,8 @@
zero_buffers If this option is given, fio will init the IO buffers to
all zeroes. The default is to fill them with random data.
+ The resulting IO buffers will not be completely zeroed,
+ unless scramble_buffers is also turned off.
refill_buffers If this option is given, fio will refill the IO buffers
on every submit. The default is to only fill it at init
diff --git a/fio.1 b/fio.1
index 2dee56b..20f0c09 100644
--- a/fio.1
+++ b/fio.1
@@ -430,6 +430,8 @@
.TP
.B zero_buffers
Initialise buffers with all zeros. Default: fill buffers with random data.
+The resulting IO buffers will not be completely zeroed, unless
+\fPscramble_buffers\fR is also turned off.
.TP
.B refill_buffers
If this option is given, fio will refill the IO buffers on every submit. The