RN104 message Data Degraded - How to determine which drive is failed.

Hello I am not new to having the NAS, RN104 but new to this forum.  Its worked flawless till this issue.

As I stated it saying data is degraded.

When I look at the system page, volume tab it shows only drives in slots 1,2 and 3 with 3 being the most right slot.  All three show GREEN indicator on the page which says its SPARE???  The server has 4 drives so Im thinking its the drive in most left slot 0.

But I did some reading and I downloaded the logs and reading the MDSTAT log it is kinda indicating the drive in slot 2 that is 'Removed"  see snippet of log here:

Number Major Minor RaidDevice State
0 8 17 0 active sync /dev/sdb1
1 8 33 1 active sync /dev/sdc1
- 0 0 2 removed
4 8 1 3 active sync /dev/sda1
/dev/md/1:

WHich physical drive is DEAD??  Please help, thank you.  I pasted the MDSTAT log below.

Phil

Personalities : [raid0] [raid1] [raid10] [raid6] [raid5] [raid4]
md127 : active raid5 sdb3[0] sda3[4] sdc3[1]
11706500352 blocks super 1.2 level 5, 64k chunk, algorithm 2 [4/3] [UU_U]

md1 : active raid1 sda2[0] sdc2[2] sdb2[1]
523264 blocks super 1.2 [3/3] [UUU]

md0 : active raid1 sdb1[0] sda1[4] sdc1[1]
4190208 blocks super 1.2 [4/3] [UU_U]

unused devices: <none>
/dev/md/0:
Version : 1.2
Creation Time : Sat Jan 2 17:36:29 2016
Raid Level : raid1
Array Size : 4190208 (4.00 GiB 4.29 GB)
Used Dev Size : 4190208 (4.00 GiB 4.29 GB)
Raid Devices : 4
Total Devices : 3
Persistence : Superblock is persistent

Update Time : Wed Jan 4 07:21:36 2023
State : clean, degraded
Active Devices : 3
Working Devices : 3
Failed Devices : 0
Spare Devices : 0

Consistency Policy : unknown

Name : 2fe557f0:0 (local to host 2fe557f0)
UUID : a36037b9:3458e683:219bc78e:e4c2ee5d
Events : 1321770

Number Major Minor RaidDevice State
0 8 17 0 active sync /dev/sdb1
1 8 33 1 active sync /dev/sdc1
- 0 0 2 removed
4 8 1 3 active sync /dev/sda1
/dev/md/1:
Version : 1.2
Creation Time : Thu Aug 11 07:05:01 2022
Raid Level : raid1
Array Size : 523264 (511.00 MiB 535.82 MB)
Used Dev Size : 523264 (511.00 MiB 535.82 MB)
Raid Devices : 3
Total Devices : 3
Persistence : Superblock is persistent

Update Time : Wed Jan 4 07:21:35 2023
State : clean
Active Devices : 3
Working Devices : 3
Failed Devices : 0
Spare Devices : 0

Consistency Policy : unknown

Name : 2fe557f0:1 (local to host 2fe557f0)
UUID : 7a75f130:39036f7c:adfea2e2:dc73e50d
Events : 19

Number Major Minor RaidDevice State
0 8 2 0 active sync /dev/sda2
1 8 18 1 active sync /dev/sdb2
2 8 34 2 active sync /dev/sdc2
/dev/md/data-0:
Version : 1.2
Creation Time : Sat Jan 2 17:36:29 2016
Raid Level : raid5
Array Size : 11706500352 (11164.19 GiB 11987.46 GB)
Used Dev Size : 3902166784 (3721.40 GiB 3995.82 GB)
Raid Devices : 4
Total Devices : 3
Persistence : Superblock is persistent

Update Time : Wed Jan 4 07:17:15 2023
State : clean, degraded
Active Devices : 3
Working Devices : 3
Failed Devices : 0
Spare Devices : 0

Layout : left-symmetric
Chunk Size : 64K

Consistency Policy : unknown

Name : 2fe557f0:data-0 (local to host 2fe557f0)
UUID : 45fcae7b:5db42a62:08afbae5:91d8a320
Events : 215653

Number Major Minor RaidDevice State
0 8 19 0 active sync /dev/sdb3
1 8 35 1 active sync /dev/sdc3
- 0 0 2 removed
4 8 3 3 active sync /dev/sda3