hdd/functions.sh: check sectors

hdd/functions.sh

@@ -9,6 +9,8 @@ is_hdd()
 
     #hdparm -i "$1" | grep -q "Model=WDC"
     local drive="$(basename $dev)"
+
+    [ -d "/sys/block/$drive" ] || return 0
     # since 2.6.29
     rot="$(cat /sys/block/$drive/queue/rotational)"
     [ "$rot" = "1" ]
@@ -33,6 +35,7 @@ print_size()
     local dev="$1"
     local sectors
     sectors="$(hdparm -i $dev | grep "LBAsects=" | sed -e "s|.*LBAsects=\(.*\)|\1|")" #"
+    [ -n "$sectors" ] || { echo "No info" ; return ; }
     # other method:
     #sectors="$(blockdev --getsz $dev)"
     echo "$(($sectors/2/1024/1024)) GB"
@@ -44,5 +47,6 @@ print_partsize()
     local sectors
     local drive="$(basename $dev)"
     sectors="$(cat /sys/class/block/$drive/size)"
+    [ -n "$sectors" ] || { echo "No info" ; return ; }
     echo "$(($sectors/2/1024/1024)) GB"
 }