b=11171

[fs/lustre-release.git] / lustre-iokit / sgpdd-survey / README.sgpdd-survey

diff --git a/lustre-iokit/sgpdd-survey/README.sgpdd-survey b/lustre-iokit/sgpdd-survey/README.sgpdd-survey
index 8fb5c97..d9cba1f 100644 (file)
--- a/lustre-iokit/sgpdd-survey/README.sgpdd-survey
+++ b/lustre-iokit/sgpdd-survey/README.sgpdd-survey
@@ -34,6 +34,11 @@ SCSI device:
        (make sure the kernel module "sg" is loaded)
 Raw device:
        Must appear in the output of 'raw -qa'
+
+       If you need to create raw devices in order to use this tool, note that
+       raw device 0 can not be used due to a bug in certain versions of the
+       "raw" utility (including that shipped with RHEL4U4.)
+
 You may not mix raw and SCSI devices in the test specification.
 
 
@@ -82,5 +87,5 @@ phased by seeks at the given record size.
 The included script "parse.pl" will process output files and create
 .csv files for spreadsheet import
 
-The "plot-sgpdd.pl" script plots the results directly using gnuplot.
+The "plot-sgpdd" script plots the results directly using gnuplot.