Add verify_pattern option

[fio.git] / HOWTO

diff --git a/HOWTO b/HOWTO
index a07cf8848923245891b9c76bc3778e5c460a6856..58e12819e7f5868f5adb12eac6e5949784266227 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -612,6 +612,14 @@ verify_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
                        evenly.
+
+verify_pattern=int     If set, fio will fill the io buffers with this
+               pattern. Fio defaults to filling with totally random
+               bytes, but sometimes it's interesting to fill with a known
+               pattern for io verification purposes. Depending on the
+               width of the pattern, fio will fill 1/2/3/4 bytes of the
+               buffer at the time. The verify_pattern cannot be larger than
+               a 32-bit quantity.
                
 stonewall      Wait for preceeding jobs in the job file to exit, before
                starting this one. Can be used to insert serialization