Add 'null' verify option
For testing purposes.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/HOWTO b/HOWTO
index 8312d93..a5be9db 100644
--- a/HOWTO
+++ b/HOWTO
@@ -555,6 +555,10 @@
crc32 Use a crc32 sum of the data area and store
it in the header of each block.
+ null Only pretend to verify. Useful for testing
+ internals with ioengine=null, not for much
+ else.
+
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.