diff --git a/test.uefi b/test.uefi
index ce68e8c..67c2fed 100644
--- a/test.uefi
+++ b/test.uefi
@@ -14,7 +14,7 @@ ESP_LABEL="EFI"
 
 CHECK_PARTITION_EXISTENCE_OUTPUT=$(lsblk -pldo NAME | grep -ic "${DRIVE}")
 
-if [[ ${CHECK_PARTITION_EXISTENCE_OUTPUT} -eq 1 ]]; then
+if [[ ${CHECK_PARTITION_EXISTENCE_OUTPUT} -eq 0 ]]; then
   echo "Platte existiert nicht, Abbruch!"
   exit 1
 else
@@ -27,7 +27,7 @@ fi
 
 declare -A PARTITIONS_PRESENT=()
 
-CHECK_PARTITIONS_OUTPUT=$(lsblk -pldo NAME,PARTTYPE "${DRIVE}[0-9]")
+CHECK_PARTITIONS_OUTPUT=$(lsblk -plo NAME,PARTTYPE | grep -i "${DRIVE}[0-9]")
 
 CHECK_ESP=$(echo "${CHECK_PARTITIONS_OUTPUT}" | grep -c "c12a7328-f81f-11d2-ba4b-00a0c93ec93b")
 PARTITIONS_PRESENT+=([ESP]="${CHECK_ESP}")