Document the verify behaviour wrt read and write workloads

[fio.git] / HOWTO

diff --git a/HOWTO b/HOWTO
index eb8f453ca309b156d279ce1c7a678cefccb6eb6b..aa10dbc2bccadd9dbdab852d7cc1695b8404a498 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -823,7 +823,11 @@ verify=str If writing to a file, fio can verify the file contents
 
                This option can be used for repeated burn-in tests of a
                system to make sure that the written data is also
-               correctly read back.
+               correctly read back. If the data direction given is
+               a read or random read, fio will assume that it should
+               verify a previously written file. If the data direction
+               includes any form of write, the verify will be of the
+               newly written data.
 
 verifysort=bool        If set, fio will sort written verify blocks when it deems
                it faster to read them back in a sorted manner. This is