1 files changed, 3 insertions, 1 deletions
diff --git a/atasmart.c b/atasmart.c
index a30efe8..f3c8e32 100644
--- a/atasmart.c
+++ b/atasmart.c
@@ -1273,7 +1273,9 @@ static void verify_sectors(SkDisk *d, SkSmartAttributeParsedData *a) {
 
         max_sectors = d->size / 512ULL;
 
-        if (max_sectors > 0 && a->pretty_value > max_sectors) {
+        if (a->pretty_value == 0xffffffffULL ||
+            a->pretty_value == 0xffffffffffffffffULL ||
+            (max_sectors > 0 && a->pretty_value > max_sectors)) {
                 a->pretty_value = SK_SMART_ATTRIBUTE_UNIT_UNKNOWN;
                 d->attribute_verification_bad = TRUE;
         } else {