Add 'allow_mounted_write' option

[fio.git] / HOWTO

diff --git a/HOWTO b/HOWTO
index 74475129fd417f85c083872b27d8d0486f88936a..ab0250cb60e6d84cde61f67916f8b48cef6ee843 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -1204,6 +1204,12 @@ allow_file_create=bool   If true, fio is permitted to create files as part
                option is false, then fio will error out if the files it
                needs to use don't already exist. Default: true.
 
+allow_mounted_write=bool       If this isn't set, fio will abort jobs that
+               are destructive (eg that write) to what appears to be a
+               mounted device or partition. This should help catch creating
+               inadvertently destructive tests, not realizing that the test
+               will destroy data on the mounted file system. Default: false.
+
 pre_read=bool  If this is given, files will be pre-read into memory before
                starting the given IO operation. This will also clear
                the 'invalidate' flag, since it is pointless to pre-read