------------
. sg3_utils (for sgp_dd)
-. SCSI device
+ SCSI device
+ Or, if using non-scsi disk
+ raw device support
+ sg3_utils
Overview
writing a separate area of the disk to show how performance varies with the
number of concurrent stripe files.
+The device(s) used must meet one of two tests:
+SCSI device:
+ Must appear in the output of 'sg_map'
+Raw device:
+ Must appear in the output of 'raw -qa'
+You may not mix raw and SCSI devices in the test specification.
+
Running
-------
######################################################################
# customize per survey
+# CHOOSE EITHER scsidevs or rawdevs
# the SCSI devices to measure - WARNING: will be erased.
+#scsidevs="/dev/sde /dev/sdh"
+# The raw devices to use
+#rawdevs="/dev/raw/raw1"
#scsidevs=`ls /dev/sd[a-z] /dev/sd[a-z][a-z]` # all devices, if you use udev
-scsidevs=${scsidevs:-"/dev/sde /dev/sdh"}
# result file prefix. date/time+hostname makes unique
# NB ensure the path exists if it includes subdirs
# map given device names into SG device names
i=0
devs=()
-for d in $scsidevs; do
- devs[$i]=`sg_map | awk "{if ($ 2 == \"$d\") print $ 1}"`
- if [ -z "$devs[$i]" ]; then
- echo "Can't find SG device for $d"
- exit 1
- fi
- i=$((i+1))
-done
+if [ $scsidevs ]; then
+ # we will test for a LUN, the test for a partition
+ # if the partition number is > 9 this will fail
+ for d in $scsidevs; do
+ devs[$i]=`sg_map | awk "{if ($ 2 == \"$d\") print $ 1}"`
+ if [ -z "${devs[i]}" ]; then
+ echo "Can't find SG device for $d, testing for partition"
+ pt=`echo $d | sed 's/[0-9]$//'`
+ # Try again
+ devs[$i]=`sg_map | awk "{if ($ 2 == \"$pt\") print $ 1}"`
+ if [ -z "${devs[i]}" ]; then
+ echo "Can't find SG device $pt"
+ exit 1
+ fi
+ fi
+ i=$((i+1))
+ done
+elif [ $rawdevs ]; then
+ for r in $rawdevs; do
+ RES=`raw -q $r`
+ if [ $? -eq 0 ];then
+ devs[$i]=$r
+ i=$((i+1))
+ else
+ echo "Raw device $r not set up"
+ exit 1
+ fi
+ done
+else
+ echo "Must specify scsidevs or rawdevs"
+ exit 1
+fi
+
ndevs=${#devs[@]}
rsltf=${rslt}.summary