TS-469 pro Raid 5 broken says raid inactive

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1

Had error other morning where said “HDD3 removed” - disk seemed ok, reinserted it and raid rebuild started. Then threw another error and now raid is inactive, cannot rebuild and when reboot goes back to inactive. I started a scan on disk 4 and says abnormal - bad block.

Cannot see file structure and says RAID Group 1 "Not active in dashboard

This is current state

Welcome to MD superblock checker (v1.4) - have a nice day~

Scanning system...

HAL firmware detected!
Scanning Enclosure 0...

RAID metadata found!
UUID:           f5aacc06:27d567f2:ccfd6672:785f151a
Level:          raid5
Devices:        4
Name:           md1
Chunk Size:     64K
md Version:     1.0
Creation Time:  Apr 12 06:08:12 2017
Status:         OFFLINE
===============================================================================
 Disk | Device | # | Status |   Last Update Time   | Events | Array State
===============================================================================
   1  /dev/sda3  0   Active   Apr  7 16:53:31 2025   116853   AA.A
   2  /dev/sdb3  1   Active   Apr  7 16:45:44 2025   116853   AA.A
   3  /dev/sdc3  2  Rebuild   Apr  7 16:40:46 2025   109849   AAAA
   4  /dev/sdd3  3   Active   Apr  7 16:46:19 2025   110013   AA.A
===============================================================================

Where to head next?

2

You had two drives fail in a RAID5…your data is toast…start from scratch and restore from your backups

3

Update - ran this from shell

mdadm -CfR --assume-clean /dev/md1 -l 5 -n 4 -c 64 -e 1.0 /dev/sda3 /dev/sdb3 /dev/sdc3 /dev/sdd3

Rechecked QTS gui and it brought up option to do a scrub in Storage manager - ran the scrub and now have file structure as active and seem to have most data available Drive 4 is still in warning so have 4 x drives to swap over. Almost 9 years old on the drives so probably time.

4

do you not run automated S.M.A.R.T test (rapid and complete) on all disks?

5

With event counters drifted apart like this…an assume clean mount can result in data swiss cheese…I guess there is no backups as that was completely ignored

6

Yes I do run automated SMART test. Backups of the critical data I have.