diff --git a/cmdline/parity.c b/cmdline/parity.c
index 30d66dbc..8181dab6 100644
--- a/cmdline/parity.c
+++ b/cmdline/parity.c
@@ -577,6 +577,12 @@ int parity_chsize(struct snapraid_parity_handle* handle, struct snapraid_parity*
 		}
 	}
 
+	/* if we cannot allocate all the space */
+	if (size != 0) {
+		log_fatal("Failed to allocate all the required parity space. You miss %" PRIu64 " bytes.\n", size);
+		return -1;
+	}
+
 	/* now copy the new size in the parity data */
 	if (is_modified)
 		*is_modified = 0;
diff --git a/cmdline/sync.c b/cmdline/sync.c
index 617f1578..6db07311 100644
--- a/cmdline/sync.c
+++ b/cmdline/sync.c
@@ -1518,7 +1518,7 @@ int state_sync(struct snapraid_state* state, block_off_t blockstart, block_off_t
 				data_off_t out_size;
 				parity_size(&parity_handle[l], &out_size);
 				parity_overflow(state, out_size);
-				log_fatal("WARNING! Without an accessible %s file, it isn't possible to sync.\n", lev_name(l));
+				log_fatal("WARNING! Without an unsable %s file, it isn't possible to sync.\n", lev_name(l));
 				exit(EXIT_FAILURE);
 				/* LCOV_EXCL_STOP */
 			}