Extend --readonly

[fio.git] / README

diff --git a/README b/README
index 40e031a57d4fc09b6fd32604d6b89afd2f2fcfd7..b7fc96b6888d1032bf04cbbb5f8c5f309fa18e7c 100644 (file)
--- a/README
+++ b/README
@@ -32,6 +32,9 @@ Dag Wieërs has RPMs for Red Hat related distros, find them here:
 
 http://dag.wieers.com/rpm/packages/fio/
 
+Mandriva has integrated fio into their package repository, so installing
+on that distro should be as easy as typing 'urpmi fio'.
+
 
 Mailing list
 ------------
@@ -68,21 +71,28 @@ $ fio
        --help          Print this page
        --cmdhelp=cmd   Print command help, "all" for all of them
        --showcmd       Turn a job file into command line options
+       --readonly      Turn on safety read-only checks
 
 Any parameters following the options will be assumed to be job files,
 unless they match a job file parameter. You can add as many as you want,
 each job file will be regarded as a separate group and fio will stonewall
 its execution.
 
+The --readonly switch is an extra safety guard to prevent accidentically
+turning on a write setting when that is not desired. Fio will only write
+if rw=write/randwrite/rw/randrw is given, but this extra safety net can
+be used as an extra precaution. It will also enable a write check in the
+io engine core to prevent an accidental write due to a fio bug.
+
 
 Job file
 --------
 
 See the HOWTO file for a more detailed description of parameters and what
-they mean. This file contains the terse version.  Only a few options can
-be controlled with command line parameters, generally it's a lot easier to
+they mean. This file contains the terse version. You can describe big and
+complex setups with the command line, but generally it's a lot easier to
 just write a simple job file to describe the workload. The job file format
-is in the ini style format, as it's easy to read and write for the user.
+is in the ini style format, as that is easy to read and write for the user.
 
 The job file parameters are: