X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=HOWTO;h=e1399b4a101925d94527542e4c5f8f696668912b;hp=4398ffa717843095889b8d2065d5a05769a50acb;hb=4027b2a142c01869a913c8c0654e3392ef1d0489;hpb=d81d0f992bb3f12be22311b81b6b0b209e42c33b;ds=sidebyside

diff --git a/HOWTO b/HOWTO
index 4398ffa7..e1399b4a 100644
--- a/HOWTO
+++ b/HOWTO
@@ -163,12 +163,12 @@ Command line options
 
 .. option:: --readonly
 
-	Turn on safety read-only checks, preventing writes.  The ``--readonly``
-	option is an extra safety guard to prevent users from accidentally starting
-	a write workload when that is not desired.  Fio will only write if
-	`rw=write/randwrite/rw/randrw` is given.  This extra safety net can be used
-	as an extra precaution as ``--readonly`` will also enable a write check in
-	the I/O engine core to prevent writes due to unknown user space bug(s).
+	Turn on safety read-only checks, preventing writes and trims.  The
+	``--readonly`` option is an extra safety guard to prevent users from
+	accidentally starting a write or trim workload when that is not desired.
+	Fio will only modify the device under test if
+	`rw=write/randwrite/rw/randrw/trim/randtrim/trimwrite` is given.  This
+	safety net can be used as an extra precaution.
 
 .. option:: --eta=when