I have a TS-453D model with firmware 4.5.4.1723 (2021/07/08)
I have Raid 5 with 4 2T discs. 2 discs have warning regarding bad sectors, so I start replacing it to new ones. Options for replace one by one disc was disabled, so I replace directly disc in 2 slot to new. New discs I have 4TB. After replacing it causes degraded raid and replaced dis was in state "not member". I found solution how to add this disk to raid by following command:
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mdadm --manage /dev/md1 --add /dev/sdc3
So I looked for this issue and found some solutions on this forum. I tried followinf command:
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md_checker
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Welcome to MD superblock checker (v2.0) - have a nice day~
Scanning system...
RAID metadata found!
UUID: 6e7c43ac:55c1bfdb:727c6edd:adcf0f72
Level: raid5
Devices: 4
Name: md1
Chunk Size: 512K
md Version: 1.0
Creation Time: Dec 14 15:17:22 2015
Status: OFFLINE
===============================================================================================
Enclosure | Port | Block Dev Name | # | Status | Last Update Time | Events | Array State
===============================================================================================
---------------------------------- 0 Missing -------------------------------------------
---------------------------------- 1 Missing -------------------------------------------
NAS_HOST 3 /dev/sda3 2 Active Sep 22 07:24:07 2021 71508 AAAA
NAS_HOST 4 /dev/sdb3 3 Active Sep 22 07:24:07 2021 71508 AAAA
===============================================================================================
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/etc/init.d/init_lvm.sh
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Changing old config name...
Reinitialing...
Detect disk(8, 48)...
dev_count ++ = 0Detect disk(8, 16)...
dev_count ++ = 1Detect disk(8, 32)...
dev_count ++ = 2Detect disk(8, 0)...
dev_count ++ = 3Detect disk(8, 48)...
Detect disk(8, 16)...
Detect disk(8, 32)...
Detect disk(8, 0)...
/bin/cat: /sys/bus/pci/devices/0000:00:13.0/0000:01:00.0/subsystem_vendor: No such file or directory
/bin/cat: /sys/bus/pci/devices/0000:00:13.0/0000:01:00.0/subsystem_vendor: No such file or directory
sys_startup_p2:got called count = -1
Done
cat /proc/mdstat
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Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4] [multipath]
md322 : active raid1 sdd5[3](S) sdc5[2](S) sdb5[1] sda5[0]
7235136 blocks super 1.0 [2/2] [UU]
bitmap: 0/1 pages [0KB], 65536KB chunk
md256 : active raid1 sdd2[3](S) sdc2[2](S) sdb2[1] sda2[0]
530112 blocks super 1.0 [2/2] [UU]
bitmap: 0/1 pages [0KB], 65536KB chunk
md13 : active raid1 sdd4[27] sda4[2] sdb4[3]
458880 blocks super 1.0 [27/3] [U_UU_______________________]
bitmap: 1/1 pages [4KB], 65536KB chunk
md9 : active raid1 sdd1[26] sdc1[25] sda1[2] sdb1[3]
530048 blocks super 1.0 [25/4] [UUUU_____________________]
bitmap: 1/1 pages [4KB], 65536KB chunk
unused devices: <none>
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Filesystem Size Used Available Use% Mounted on
none 400.0M 286.3M 113.7M 72% /
devtmpfs 1.8G 8.0K 1.8G 0% /dev
tmpfs 64.0M 388.0K 63.6M 1% /tmp
tmpfs 1.9G 136.0K 1.9G 0% /dev/shm
tmpfs 16.0M 92.0K 15.9M 1% /share
/dev/mmcblk0p5 7.7M 46.0K 7.7M 1% /mnt/boot_config
tmpfs 16.0M 0 16.0M 0% /mnt/snapshot/export
/dev/md9 493.5M 157.4M 336.0M 32% /mnt/HDA_ROOT
cgroup_root 1.9G 0 1.9G 0% /sys/fs/cgroup
/dev/md13 417.0M 388.0M 29.0M 93% /mnt/ext
/dev/ram2 433.9M 2.3M 431.6M 1% /mnt/update
tmpfs 64.0M 3.2M 60.8M 5% /samba
tmpfs 48.0M 68.0K 47.9M 0% /samba/.samba/lock/msg.lock
tmpfs 16.0M 0 16.0M 0% /mnt/ext/opt/samba/private/msg.sock
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/dev/md9:
Version : 1.0
Creation Time : Mon Dec 14 15:16:54 2015
Raid Level : raid1
Array Size : 530048 (517.71 MiB 542.77 MB)
Used Dev Size : 530048 (517.71 MiB 542.77 MB)
Raid Devices : 25
Total Devices : 4
Persistence : Superblock is persistent
Intent Bitmap : Internal
Update Time : Wed Sep 22 09:22:33 2021
State : active, degraded
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Name : 9
UUID : f5456f55:7361a422:179427ed:b4e118d5
Events : 22138238
Number Major Minor RaidDevice State
25 8 33 0 active sync /dev/sdc1
26 8 49 1 active sync /dev/sdd1
2 8 1 2 active sync /dev/sda1
3 8 17 3 active sync /dev/sdb1
8 0 0 8 removed
10 0 0 10 removed
12 0 0 12 removed
14 0 0 14 removed
16 0 0 16 removed
18 0 0 18 removed
20 0 0 20 removed
22 0 0 22 removed
24 0 0 24 removed
26 0 0 26 removed
28 0 0 28 removed
30 0 0 30 removed
32 0 0 32 removed
34 0 0 34 removed
36 0 0 36 removed
38 0 0 38 removed
40 0 0 40 removed
42 0 0 42 removed
44 0 0 44 removed
46 0 0 46 removed
48 0 0 48 removed
Jiri