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--- hdparm-9.28/wiper/wiper.sh.orig 2010-03-09 06:17:37.000000000 -0800
--- hdparm-9.28/wiper/wiper.sh 2010-05-15 03:08:02.182856971 -0700
@@ -29,7 +29,7 @@
function usage_error(){
echo >&2
echo "Linux tune-up (TRIM) utility for SATA SSDs"
- echo "Usage: $0 [--verbose] [--commit] <mount_point|block_device>" >&2
+ echo "Usage: $0 [--max-ranges <num>] [--verbose] [--commit] <mount_point|block_device>" >&2
echo " Eg: $0 /dev/sda1" >&2
echo >&2
exit 1
@@ -44,6 +44,7 @@
export verbose=0
commit=""
+max_ranges=-1
argc=$#
arg=""
while [ $argc -gt 0 ]; do
@@ -51,6 +52,10 @@
commit=yes
elif [ "$1" = "--verbose" ]; then
verbose=$((verbose + 1))
+ elif [ "$1" = "--max-ranges" -a $argc -gt 1 ]; then
+ max_ranges=$2
+ argc=$((argc - 1))
+ shift
elif [ "$1" = "" ]; then
usage_error
else
@@ -499,6 +550,18 @@
fi
fi
+## Different SSD's have a different maximum number of ranges they'll accept
+## in a single TRIM command.
+if [ $max_ranges -le 0 ] ; then
+ model=`$HDPARM -I $rawdev | $GAWK '/Model Number/ { print $NF }'`
+ case "$model" in
+ SSDSA[12]*) max_ranges=512 ;; # Intel X18-M/X25-M
+ OCZ-VERTEX2) max_ranges=64 ;; # OCZ Vertex2
+ *) max_ranges=65535
+ esac
+fi
+[ $verbose -gt 0 ] && echo "max-ranges = $max_ranges"
+
## All ready. Now let the user know exactly what we intend to do:
##
mountstatus="$fstype non-mounted"
@@ -608,7 +671,7 @@
nsectors += count;
while (count > 0) {
this_count = (count > 65535) ? 65535 : count
- printf "%u:%u ", lba, this_count
+ printf "%u:%u \n", lba, this_count
if (verbose > 1)
printf "%u:%u ", lba, this_count > "/dev/stderr"
lba += this_count
@@ -695,6 +758,22 @@
-v verbose="$verbose" \
-v xfs_blksects="$xfs_blksects" \
-v xfs_agoffsets="$xfs_agoffsets" \
- "$GAWKPROG" | $TRIM
+ "$GAWKPROG" | (
+ i=0
+ while read range ; do
+ ranges=$ranges" "$range
+ ((i++))
+ if [ $i -ge $max_ranges ] ; then
+ [ $verbose -gt 0 ] && echo -e "Trim ranges:"$ranges"\n"
+ echo $ranges | $TRIM
+ ranges=""
+ i=0
+ fi
+ done
+ if [ $i -gt 0 ] ; then
+ [ $verbose -gt 0 ] && echo -e "Trim ranges:"$ranges"\n"
+ echo $ranges | $TRIM
+ fi
+ )
do_cleanup $?
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