# \[PATCH\] Monitor: Check redundancy for arrays

- From: Mariusz Tkaczyk \<hidden\>
- Date: 2017-09-04 10:52:46 
- List: linux-raid
- Page: https://ratatoskr.run/linux-raid/2017/09/6636693
- Thread: https://ratatoskr.run/linux-raid/2017/09/6636693/t.md

```text
GET_MISMATCH option doesn't exist for RAID arrays without redundancy
so sysfs_read fails if this information is requested. Set options
according to the device using information from /proc/mdstat.

Signed-off-by: Mariusz Tkaczyk <redacted>
---
 Monitor.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/Monitor.c b/Monitor.c
index 497e364..b60996b 100644
--- a/Monitor.c
+++ b/Monitor.c
@@ -466,7 +466,7 @@ static int check_array(struct state *st, struct mdstat_ent *mdstat,
 	int new_array = 0;
 	int retval;
 	int is_container = 0;
-	unsigned long array_only_flags = 0;
+	unsigned long redundancy_only_flags = 0;
 
 	if (test)
 		alert("TestMessage", dev, NULL, ainfo);
@@ -504,11 +504,11 @@ static int check_array(struct state *st, struct mdstat_ent *mdstat,
 	if (md_get_array_info(fd, &array) < 0)
 		goto disappeared;
 
-	if (!is_container)
-		array_only_flags |= GET_MISMATCH;
+	if (!is_container && map_name(pers, mse->level) > 0)
+		redundancy_only_flags |= GET_MISMATCH;
 
 	sra = sysfs_read(-1, st->devnm, GET_LEVEL | GET_DISKS | GET_DEVS |
-			GET_STATE | array_only_flags);
+			GET_STATE | redundancy_only_flags);
 
 	if (!sra)
 		goto disappeared;
-- 
1.8.3.1

```