From 149b408c38fc275e94ae0652af2d2e89593b4ba3 Mon Sep 17 00:00:00 2001
From: Andrea Mazzoleni <amadvance@gmail.com>
Date: Thu, 24 Sep 2026 19:46:21 +0200
Subject: [PATCH] Skip disk cache statistics for mapping holes

---
 cmdline/io.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cmdline/io.c b/cmdline/io.c
index 77e95daa..ad93d9b3 100644
--- a/cmdline/io.c
+++ b/cmdline/io.c
@@ -553,7 +553,7 @@ static void io_refresh_thread(struct snapraid_io* io)
 
 		if (worker->parity_handle)
 			io->state->parity[worker->parity_handle->level].cached_blocks = cached;
-		else
+		else if (worker->handle->disk) /* mapping holes have no disk statistics */
 			worker->handle->disk->cached_blocks = cached;
 	}