TS-431P2 RAID6 Failure - HDD Fail, RAID Group Error (not active)

[jasonfr]

I had a HDD failure in Disk 3 of my RAID6 array of my TS-431P2.

NAS: TS-431P2 8GB
Firmware: 5.0.0.2131
HDD: 4 x Seagate ST3000VN007
RAID: RAID6
Failure: Drive #3

Initially it reported my RAID status was degraded, then it said Error after I removed the failed drive #3 replacing it with a similar model Seagate ST3000VN006.

I tried to recover RAID group, but I got an error "Failed to recover storage pool...".

Other points to note, the status next to HDD #1 & #4 is blue, the status next to HDD #2 & the new HDD #3 is purple. I also have a busy activity icon with

Drive Status.jpg

Storage Space RAID ERROR and BUSY.jpg

I'm at a loss on how to proceed to get back my RAID6 array and data, any help/guidance would be greatly appreciated.

[FSC830]

Strange... raid6 should be operating even if 2 disks are gone.
A purple disk means that disk is not member of raidgroup!?
So no idea what has happened at your NAS. Best is to contact QNAP support.

After replacing a faulty disk there is no need for a "Recover Raidgroup", a rebuild should start automatically.
So my guess is that there happened more than only a disk fault.

Regards

[dolbyman]

Did you hotswap the drives(good) or shut the NAS down when swapping the drives(bad)?

[jasonfr]

Did you hotswap the drives(good) or shut the NAS down when swapping the drives(bad)?

I think I restarted, hotswapped failed drive with new drive. Nothing happened after sometime, so restarted and left.

[dolbyman]

can you login via ssh and do a

Code: Select all

md_checker

[jasonfr]

can you login via ssh and do a

Code: Select all

md_checker

Sure thing...

# md_checker

Welcome to MD superblock checker (v2.0) - have a nice day~

Scanning system...


RAID metadata found!
UUID: 898a2c82:cac9784c:2b50ebc1:7e1f18e0
Level: raid6
Devices: 4
Name: md1
Chunk Size: 512K
md Version: 1.0
Creation Time: Oct 14 01:04:10 2020
Status: OFFLINE
===============================================================================================
Enclosure | Port | Block Dev Name | # | Status | Last Update Time | Events | Array State
===============================================================================================
NAS_HOST 1 /dev/sda3 0 Active Oct 3 21:40:49 2022 11200 A...
NAS_HOST 2 /dev/sdb3 1 Active Oct 3 13:27:59 2022 11187 AA.A
---------------------------------- 2 Missing -------------------------------------------
NAS_HOST 4 /dev/sdc3 3 Active Oct 3 13:37:50 2022 11199 A..A
===============================================================================================


NOTE: I have ejected drive #3, which is the new drive to replace the failed one.

[dolbyman]

you have all disks desynced from each other (see event counter), hence there will be no rebuild

here is what a healthy RAID6 should look like

Code: Select all

RAID metadata found!
UUID:           2287586a:dd935b28:8f1d0240:2c5627bf
Level:          raid6
Devices:        6
Name:           md1
Chunk Size:     512K
md Version:     1.0
Creation Time:  Oct 9 15:48:10 2019
Status:         ONLINE (md1) [UUUUUU]
===============================================================================================
 Enclosure | Port | Block Dev Name | # | Status |   Last Update Time   | Events | Array State
===============================================================================================
 NAS_HOST       7        /dev/sdf3   0   Active   Oct  5 11:25:22 2022   544579   AAAAAA
 NAS_HOST       8        /dev/sdd3   1   Active   Oct  5 11:25:22 2022   544579   AAAAAA
 NAS_HOST       3        /dev/sde3   2   Active   Oct  5 11:25:22 2022   544579   AAAAAA
 NAS_HOST       6        /dev/sdh3   3   Active   Oct  5 11:25:22 2022   544579   AAAAAA
 NAS_HOST       5        /dev/sdg3   4   Active   Oct  5 11:25:22 2022   544579   AAAAAA
 NAS_HOST       4        /dev/sdc3   5   Active   Oct  5 11:25:22 2022   544579   AAAAAA
===============================================================================================

[jasonfr]

you have all disks desynced from each other (see event counter), hence there will be no rebuild

here is what a healthy RAID6 should look like

Code: Select all

RAID metadata found!
UUID:           2287586a:dd935b28:8f1d0240:2c5627bf
Level:          raid6
Devices:        6
Name:           md1
Chunk Size:     512K
md Version:     1.0
Creation Time:  Oct 9 15:48:10 2019
Status:         ONLINE (md1) [UUUUUU]
===============================================================================================
 Enclosure | Port | Block Dev Name | # | Status |   Last Update Time   | Events | Array State
===============================================================================================
 NAS_HOST       7        /dev/sdf3   0   Active   Oct  5 11:25:22 2022   544579   AAAAAA
 NAS_HOST       8        /dev/sdd3   1   Active   Oct  5 11:25:22 2022   544579   AAAAAA
 NAS_HOST       3        /dev/sde3   2   Active   Oct  5 11:25:22 2022   544579   AAAAAA
 NAS_HOST       6        /dev/sdh3   3   Active   Oct  5 11:25:22 2022   544579   AAAAAA
 NAS_HOST       5        /dev/sdg3   4   Active   Oct  5 11:25:22 2022   544579   AAAAAA
 NAS_HOST       4        /dev/sdc3   5   Active   Oct  5 11:25:22 2022   544579   AAAAAA
===============================================================================================

OK that's not good.

So what is the best method to salvage data from these drives? Is there any recovery software I can run on another machine to facilitate this?

[dolbyman]

best to contact a data recovery service..next time have external backups at all times

alternatively contact QNAP, events are only minimal drifted..but QNAP support is a safer bet than back and forth in a forum (external backups at all times still stands)