[PATCH] Offset verification header by a user-specified distance

[fio.git] / HOWTO

diff --git a/HOWTO b/HOWTO
index 2797a58c3da2bbe6c240f039753ff52b0bb76265..8cb849c7c6edad0ddf70294d98f3084cd2894a5a 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -603,6 +603,10 @@ verifysort=bool    If set, fio will sort written verify blocks when it deems
                fast IO where the red-black tree sorting CPU time becomes
                significant.
 
                fast IO where the red-black tree sorting CPU time becomes
                significant.
 

+header_offset=siint    Swap the verification header with data somewhere else
+                       in the block before writing. Its swapped back before
+                       verifying.
+

 header_interval=siint  Write the verification header at a finer granularity
                        than the blocksize. It will be written for chunks the
                        size of header_interval. blocksize should divide this
 header_interval=siint  Write the verification header at a finer granularity
                        than the blocksize. It will be written for chunks the
                        size of header_interval. blocksize should divide this