add hdd utils

hdd/fix_disk.sh

+#!/bin/sh
+
+# TODO: use ddrescue log
+# ddrescue -n in /dev/null logfile
+
+if [ -z "$1" ] || [ "$1" = "-h" ] || [ "$1" = "--help" ] ; then
+    echo "Usage:"
+    echo "fix_disk [--fix]
+    exit
+fi
+
+TESTONLY=
+FORCE=
+LIST=
+
+[ "$1" = "--fix" ] && { TESTONLY=$1 ; shift ; }
+[ "$1" = "--force" ] && FORCE=$1
+[ "$1" = "--list" ] && LIST=$1
+
+test_block()
+{
+    local DEV=$1
+    local block=$2
+    hdparm --read-sector $block $DEV >/tmp/rs
+    RS=$?
+    head -n3 /tmp/rs
+    return $RS
+}
+
+fix_block()
+{
+    DEV=$1
+    block=$2
+    # FIXME: possible badblocks always returns true
+#    badblocks -b 512 -v -s $DEV $block $block && { echo "Already OK, skipped..." ; [ -z "$FORCE" ] && return ; }
+    test_block $DEV $block && { echo "Already OK, skipped..." ; [ -z "$FORCE" ] && return ; }
+    if [ -z "$TESTONLY" ] ; then
+        echo "Test only"
+        return
+    fi
+
+#    for i in 1 2 3 ; do
+#        badblocks -b 512 -f -v -w $DEV $block $block
+#        sleep 1
+#    done
+    hdparm --yes-i-know-what-i-am-doing  --repair-sector $block $DEV
+
+#    badblocks -b 512 -v -s $DEV $block $block && { echo "Read OK now!" ; return ; }
+    test_block $DEV $block && { echo "Read OK now!" ; return ; }
+    echo "Something still wrong with $block on $DEV"
+}
+
+
+# by dmesg 
+# FIXME: which device??
+#BLOCKLIST=$(
+#Buffer I/O error on device sda, logical block 32607659
+#dmesg | grep "logical block " | sed -e "s|.*Buffer I/O error on device \(sd[a-z]\), logical block \([0-9]*\)|\1 \2|g" | sort -u | \
+echo |
+while read devname block ; do
+#for i in $BLOCKLIST ; do
+    echo
+    #FIXME: logical block - 8 sectors (on 64 bit) or 4 sectors (on 32 bit?)
+    echo "List $block bad block on /dev/$devname ..."
+    #echo "Fixing $block block on /dev/$devname ..."
+    #fix_block /dev/$devname $block
+done
+
+[ -n "$LIST" ] && exit
+
+dmesg | grep "end_request: I/O error" | sed -e "s|.*end_request: I/O error, dev \(sd[a-z]\), sector \([0-9]*\)|\1 \2|g" | sort -u | \
+while read devname block ; do
+#for i in $BLOCKLIST ; do
+    echo
+    echo "Fixing $block block on /dev/$devname ..."
+    fix_block /dev/$devname $block
+done

hdd/ttt.sh

+#!/bin/sh
+
+INDEV=/dev/sdb
+OUTDEV=/dev/sdc
+
+read_sector()
+{
+    local DEV=$1
+    local block=$2
+    hdparm --read-sector $block $DEV >$3
+    RS=$?
+    #head -n3 /tmp/rs
+    return $RS
+}
+
+is_dirty_sector()
+{
+    cat $1 | sed -e "s|0000 0000 0000 0000 0000 0000 0000 0000||g" -e "s|reading.*||g" | \
+        grep -v "^$" > $1.out
+    test -s $1.out
+}
+
+echo
+i=596500
+while true ; do
+    i=$(($i+1))
+    [ $(($i%100)) = 0 ] && echo -e -n "\rSector $i"
+    read_sector $INDEV $i /tmp/INrs || continue
+    read_sector $OUTDEV $i /tmp/OUTrs || exit
+    subst "s|/dev/.*||g" /tmp/INrs /tmp/OUTrs
+    diff -u /tmp/INrs /tmp/OUTrs && continue
+    # read and differs
+    echo -e "\nProblem with sector $i"
+    if is_dirty_sector /tmp/OUTrs ; then
+        echo "Non empty target, skipping"
+        #continue
+    else
+        ofb=$((512*$i))
+        ddrescue -d --force -i $ofb -o $ofb -c 1 -s 512 $INDEV $OUTDEV
+    fi
+    #exit
+done