diff --git a/scripts/post_install/auto_post_install.sh b/scripts/post_install/auto_post_install.sh
index 69ad7bc..0bd3b6d 100644
--- a/scripts/post_install/auto_post_install.sh
+++ b/scripts/post_install/auto_post_install.sh
@@ -655,7 +655,8 @@ install_log2ram_auto() {
     else
 
         ROOT_PART=$(lsblk -no NAME,MOUNTPOINT | grep ' /$' | awk '{print $1}')
-        SYSTEM_DISK=$(lsblk -no PKNAME /dev/$ROOT_PART 2>/dev/null)
+        #SYSTEM_DISK=$(lsblk -no PKNAME /dev/$ROOT_PART 2>/dev/null)
+        SYSTEM_DISK=$(lsblk -no PKNAME /dev/$ROOT_PART 2>/dev/null | grep -E '^[a-z]+' | head -n1)
         SYSTEM_DISK=${SYSTEM_DISK:-sda}
         if [[ "$SYSTEM_DISK" == nvme* || "$(cat /sys/block/$SYSTEM_DISK/queue/rotational 2>/dev/null)" == "0" ]]; then
             is_ssd=true