"Disk Failed", then "Disk Unplugged" errors

Questions about SNMP, Power, System, Logs, disk, & RAID.
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microsolder
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Re: "Disk Failed", then "Disk Unplugged" errors

Post by microsolder » Sun Jul 26, 2020 4:19 pm

foz111 wrote:
Sat Jul 25, 2020 9:13 pm
The problem is definitely on that backplane board not the main board, i say that will 100% certainty because i took a gamble and purchased a complete but none booting broken ts-253 pro... i removed the RAM and the backplane board and placed into my nas, now my nas is functioning correctly with both drives inserted and in raid 1, ...
That is definitely a good turn of things.

In the backplane disk 1 slot there is very little electronics for the power lines. Disk 1 is fed directly from the connector and the same lines feed the disk 2 via the Q4. Being able to get it working by feeding the disk 1 from an external power supply points strongly to the issues in disk 1 power circuitry. Now that I think it, because you were not powering the disk 2 externally, could it be that the power connector of the disk 1 on the failing back plane is somehow damaged? You could plug in a scrap disk to the slot1 of the failing back plane and measure the ground, 5V, and 12V line resistances from the card edge connector to the disk, see if they are OK. Also you could check all caps on the edge connector side of slot 1. Those are between ground and 5 and 12 V lines. But if they were faulty, they should affect also the disk 2.

sirivanhoe
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Re: "Disk Failed", then "Disk Unplugged" errors

Post by sirivanhoe » Mon Jul 27, 2020 10:46 pm

Just wanted to share that I just had the very same problem on bays 3 and 4 of a TS-453A purchased brand new over 3 years ago where I had originally put 2 Seagate Enterprise NAS HDDs on bays 1 and 2 and a WD Red on bay 3 in RAID5 config, laid it down in a temp/humid controlled environment under high-quality online APC UPS, never moved or touched it anymore except 2 months ago when I had to replace the WD Red which failed, with a brand new Seagate Ironwolf Pro. Now bays 3 and 4 started to disconnect the newly arrived disk.

As I've written to a separate thread, submitting the case and logs to QNAP's support resulted in the verdict that it was a backplane fault, a repair expense estimate of about 300EUR + shipping costs to Netherlands, and the consequent spontaneous (from QNAP itself) suggestion to consider buying a NAS anew.

No trade-in program for a new unit, no discounts, warehouse swaps or whatever else. No nothing. Just spend about the same costs of a new NAS (but with only 6 months of warranty on the repair !), or throw the TS-453A away and give us again money for a new NAS.

foz111
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Re: "Disk Failed", then "Disk Unplugged" errors

Post by foz111 » Tue Jul 28, 2020 5:01 pm

I see on eBay quite a few none booting faulty ts-453 pro, maybe worth a punt as i did, i agree its annoying that qnap don't sell these backplanes or offer any type of exchange program.
Ts 253 pro
4.4.3.1354 Firmware

sirivanhoe
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Re: "Disk Failed", then "Disk Unplugged" errors

Post by sirivanhoe » Tue Jul 28, 2020 5:45 pm

Thanks foz, but then how do you know why the used QNAP doesn't boot ? What if, among the others, even the backplane is faulty ?

As of QNAP, this experience is teaching me a lot. I have another NAS, a Synology DS716+II, which is still working like charm so I've never had a need for Synology's after-sales (or after-warranty) support, so perhaps they would not be much different. Don't know, but I do know now how QNAP behaves, and I don't think I'll ever be caught again in such a situation with them.

foz111
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Re: "Disk Failed", then "Disk Unplugged" errors

Post by foz111 » Thu Jul 30, 2020 6:42 pm

yes that's the gamble... was just trying to offer cheap suggestion rather than an expensive paperweight, i don't know where you are in the world but i see on eBay UK a used TS-452 backplane, thought i would mention it https://www.ebay.co.uk/itm/QNAP-TS-453B ... ondition=4
Ts 253 pro
4.4.3.1354 Firmware

vodka
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Re: "Disk Failed", then "Disk Unplugged" errors

Post by vodka » Fri Jul 31, 2020 5:21 pm

Hello everyone, I am writing because two days ago a (5 months old disk on a 5 months old NAS) had the same exact 'Failed' then 'Disconnected' symptoms in bay 5. I have a TS-1277XU-RP NAS with 9 HGST He10 disks and 3 WD Red (I know, unsupported, but I was not in the position to buy other HGST when we got it).

I removed it and checked it with a quick SMART test and it seemed ok, so I plugged it in again: it was detected but again disconnected after 40''. Then I put in the cold spare that I had and it went ok (temperature issues?), so it started rebuilding the RAID 6, it has finished without issues.
Now my question is: how would I know if my unit have the possible faulty chip/backplane? Are they the same on all QNAP units? Sorry for the stupid question but I was not able to find the specific list of hardware for my unit.

After reading this thread I had put the FANs to performance mode...but I am honestly not happy just waiting to see if another disk get disconnected :/
The only other issue that I had with this NAS is that during the initial RAID building a disk (not the same one that was disconnected) had NCQ disabled, and another one now during rebuild...

DataMeister
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Re: "Disk Failed", then "Disk Unplugged" errors

Post by DataMeister » Fri Jul 31, 2020 10:27 pm

vodka wrote:
Fri Jul 31, 2020 5:21 pm
Hello everyone, I am writing because two days ago a (5 months old disk on a 5 months old NAS) had the same exact 'Failed' then 'Disconnected' symptoms in bay 5. I have a TS-1277XU-RP NAS with 9 HGST He10 disks and 3 WD Red (I know, unsupported, but I was not in the position to buy other HGST when we got it).

I removed it and checked it with a quick SMART test and it seemed ok, so I plugged it in again: it was detected but again disconnected after 40''. Then I put in the cold spare that I had and it went ok (temperature issues?), so it started rebuilding the RAID 6, it has finished without issues.
Now my question is: how would I know if my unit have the possible faulty chip/backplane? Are they the same on all QNAP units? Sorry for the stupid question but I was not able to find the specific list of hardware for my unit.

After reading this thread I had put the FANs to performance mode...but I am honestly not happy just waiting to see if another disk get disconnected :/
The only other issue that I had with this NAS is that during the initial RAID building a disk (not the same one that was disconnected) had NCQ disabled, and another one now during rebuild...
I guess one thing you could do is put the questionably failed disk into a desktop computer and run all the tests from the manufacturer's testing software. If it passes the long test, which can take up to 24 hours or more on big drives, then there's an almost certain chance it's a problem with the NAS instead of the drive.

Perhaps an early indicator would be to check the QNAP disk health SMART information and see what the Power_Cycle_Count is compared to the other drives. My good drive bays have readings around a couple dozen over the last 5 years, but the drives with the MOSFET issue are 3-4 times as much after they got kicked off the RAID. So if your new drive is racking up the Power_Cycle_Count numbers, and you aren't rebooting the NAS, then it's probably a problem with the bay.

Otherwise there isn't much I can think of other than waiting to see if the same bay fails again with your new drive.

vodka
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Re: "Disk Failed", then "Disk Unplugged" errors

Post by vodka » Fri Jul 31, 2020 11:20 pm

Thank you :)
I am running right now the test with the tool downloaded from HGST (honestly it looks like an extended smart to me, I'll see if I find something different!).

Will check Power_Cycle_Count on the removed disk as soon as it finishes (yesterday I did not take notes :( )
The other disks vary: two are at 2/3 while the others at 12/14, since I never reboot the NAS this does not seem a favorable clue...

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