docs: description for experimental_verify

Explain how experimental_verify differs from standard verify.

Signed-off-by: Vincent Fu <vincent.fu@samsung.com>

diff --git a/HOWTO.rst b/HOWTO.rst
index 6f5c964ae3a2de164b2ede76fca246cb3f3f45e8..2ea8455874894a0a87a2dba82a3f531bf0115c4c 100644 (file)
--- a/HOWTO.rst
+++ b/HOWTO.rst
@@ -3612,7 +3612,10 @@ Verification
 
 .. option:: experimental_verify=bool
 
-       Enable experimental verification.
+        Enable experimental verification. Standard verify records I/O metadata
+        for later use during the verification phase. Experimental verify
+        instead resets the file after the write phase and then replays I/Os for
+        the verification phase.
 
 Steady state
 ~~~~~~~~~~~~

diff --git a/fio.1 b/fio.1
index e87c29a76dba4f8984cdc0084fce03ba04a6ad5d..746c4472827f94ebd687586333443b59ebfc715f 100644 (file)
--- a/fio.1
+++ b/fio.1
@@ -3324,7 +3324,9 @@ Verify that trim/discarded blocks are returned as zeros.
 Trim this number of I/O blocks.
 .TP
 .BI experimental_verify \fR=\fPbool
-Enable experimental verification.
+Enable experimental verification. Standard verify records I/O metadata for
+later use during the verification phase. Experimental verify instead resets the
+file after the write phase and then replays I/Os for the verification phase.
 .SS "Steady state"
 .TP
 .BI steadystate \fR=\fPstr:float "\fR,\fP ss" \fR=\fPstr:float