Merge branch 'master' of ssh://brick.kernel.dk/data/git/fio

[fio.git] / HOWTO

diff --git a/HOWTO b/HOWTO
index 662ebe32acf2e10c1956f8f768171da2f92de244..aa10dbc2bccadd9dbdab852d7cc1695b8404a498 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -811,6 +811,8 @@ verify=str  If writing to a file, fio can verify the file contents
 
                        sha256  Use sha256 as the checksum function.
 
+                       sha1    Use optimized sha1 as the checksum function.
+
                        meta    Write extra information about each io
                                (timestamp, block number etc.). The block
                                number is verified.
@@ -821,7 +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