"Disk Failed", then "Disk Unplugged" errors

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

Post by Hansaplastique » Wed Sep 25, 2019 8:34 pm

I have the (seemingly) temperature related version as well. I have not tried the Komissar-fix yet.

Instead I grabbed a small USB fan (one of those really cheap ones, you'd normally plugin to the USB slot and place on your desk), and pointed it at the QNAP's CPU and the 2 SSD's I have installed (right side). It runs at a very low speed, so I can hardly hear it. For now, I have my case open (for now).

This seems to work very well - temperature drops for CPU and SSD's of more than 10 degrees C and zero disks issues.
NAS: QNAP TVS-873, TS-869 Pro, TS-569L
Router: NetGear R7000 (AsusWRT-Merlin), pfSense firewall.
QNAP Guides: English: QNAP articles at Tweaking4All, Nederlands: QNAP artikelen op Tweaking4All

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

Post by hbunjes » Thu Sep 26, 2019 4:53 am

The interesting question is: Which component must be cooled? If a backplane swap fixes it, it should be a circuit on the backplane.
Does your USB fan also cool the backplane?

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

Post by dolbyman » Thu Sep 26, 2019 5:21 am

temp could just be a warping issue of the component, you could try to reflow the pins of the mosfet

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

Post by hbunjes » Thu Sep 26, 2019 6:07 am

Yip thats right.

I will try both as soon as I get my TVS-473 back. I sent it to my dealer who sent it to QNAP in the netherlands. But nothing happens so I will probably have to reclaim it.
Thank you!

I will report my progress (or frustration) as soon as I get the device back.

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

Post by Celser » Sat Sep 28, 2019 3:17 am

So which MOFSET do I need to jumper?, Nothing on back.
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dolbyman
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Re: "Disk Failed", then "Disk Unplugged" errors

Post by dolbyman » Sat Sep 28, 2019 3:23 am

check with a fine tip probe for continuity (voltmeter)
when you found the mosfet that supplies the power to the power connector, of your failed port, then you found the mosfet in question

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

Post by Shmal » Sat Sep 28, 2019 8:05 am

Celser wrote:
Sat Sep 28, 2019 3:17 am
So which MOFSET do I need to jumper?, Nothing on back.
Dolbyman is right, since it is a completely different board you’ll have to trace the connections to verify. Based on the picture I would guess it is one of the two chips in the bottom right. Google the number printed on the chip for the pinouts/datasheet, verify they are mosfets and then see if the drain pins connect to the power pins on the sata connection.

Sata power pins are in groups of 3 (again google for exact pinouts). The mosfets pins should connect to the 5v or 12v pins on multiple sata ports.

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

Post by Celser » Sat Sep 28, 2019 9:21 am

Thank you

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

Post by kommisar » Tue Oct 01, 2019 5:42 am

Shmal wrote:
Mon Sep 23, 2019 12:51 pm
Based on Kommisar's post we gave it a shot today and it looks to be working. Disk 3 is on, and raid is rebuilding. If you are going to attempt this on your own boards, read and understand Kommisar's post so you can trace your own board. Verify your problem is identical before trying this solution. Here is what was needed for my specific scenario (disk 3 failure, eventually leading to no power).

For reference, my board is labelled TS-473 BP V1.4 (QY04):
image5.jpeg

The mosfet that seems to be the issue is on the opposite side, and is labelled 4957AGM. Google for pinouts.

image3.jpeg

That IC contains 2 mosfets. Tracing the pins looks like one feeds the 12V sata pins and the other feeds the 5V sata pins (at least for bay 3, other bays may need a different fix). Shorting the source and drain of each will bypass the mosfet and supply power permanently to the sata ports. One or both could be faulty, in my case it looks like only the 5V fix was needed but we did both. You could also just replace the IC with another 4957AGM, although it may still fail again (something caused it to fail originally).

Shorted:
image0.jpeg

Make these changes at your own risk. Modifying a circuit should be your last resort! RMA it if you are not familiar with what is shown here (or don't have a friend who is!).

Might not hurt to ask QNAP support if they will offer up a replacement board for sale (it's an easy enough swap), assuming they have a solution to the fault.

Thanks Kommisar for the diagnostic work!
Shmal, kudos for finishing the quest! Indeed, the simplest, robust and most cost-effective solution is to provide permanent power to the slot by removing the power MOSFET and by soldering jumper wires instead. There is also a number of other options like lo remove control MOSFET and replace it with a resistor or trying to replace the power MOSFET and hope the new one will work longer. But as I mentioned it earlier, simple jumper wire works great in this case and it is really bulletproof.

In generall this NAS is really good and pity it has this issue. I believe most of the devices are out of warranty now and it is safe to share this fix because it will help some people to save a lot of money and avoid unnecessary frustration.

!!!!!!!!!! BUT AGAIN, YOU WILL VOID WARRANTY AND ANY UNAUTHORIZED/UNPROFESSIONAL MODIFICATION CAN DAMAGE YOUR NAS. IT ALSO REQUIRES SOLDERING SKILLS AND KNOWLEDGE HOW TO PROPERLY HANDLE DELICATE ELECTRONIC COMPONENTS !!!!!!!!!!!!!!!!
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Shmal
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Re: "Disk Failed", then "Disk Unplugged" errors

Post by Shmal » Tue Oct 01, 2019 9:16 am

kommisar wrote:
Tue Oct 01, 2019 5:42 am
Shmal, kudos for finishing the quest! Indeed, the simplest, robust and most cost-effective solution is to provide permanent power to the slot by removing the power MOSFET and by soldering jumper wires instead. There is also a number of other options like lo remove control MOSFET and replace it with a resistor or trying to replace the power MOSFET and hope the new one will work longer. But as I mentioned it earlier, simple jumper wire works great in this case and it is really bulletproof.

In generall this NAS is really good and pity it has this issue. I believe most of the devices are out of warranty now and it is safe to share this fix because it will help some people to save a lot of money and avoid unnecessary frustration.

!!!!!!!!!! BUT AGAIN, YOU WILL VOID WARRANTY AND ANY UNAUTHORIZED/UNPROFESSIONAL MODIFICATION CAN DAMAGE YOUR NAS. IT ALSO REQUIRES SOLDERING SKILLS AND KNOWLEDGE HOW TO PROPERLY HANDLE DELICATE ELECTRONIC COMPONENTS !!!!!!!!!!!!!!!!
Welcome back to the thread and thanks for the adventure, it has been fun getting back into hardware!

Your board has heat sinks? Did you add those as part of your fix, or are you on a different revision of the board than my 1.4?

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

Post by kommisar » Sat Oct 05, 2019 10:16 pm

Shmal wrote:
Tue Oct 01, 2019 9:16 am
Welcome back to the thread and thanks for the adventure, it has been fun getting back into hardware!

Your board has heat sinks? Did you add those as part of your fix, or are you on a different revision of the board than my 1.4?
Hi Shmal,

I added the heatsinks during the initial troubleshooting of the issue. SATA controller overheating was my first suspect. Didn't help :(, but I kept the heatsinks (even upgraded to a more suitable version) anyway. Better temperature management is always a plus.

Set Shagrat
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Re: "Disk Failed", then "Disk Unplugged" errors

Post by Set Shagrat » Sat Nov 02, 2019 5:43 am

Hi Kommisar!

I have the same issue with a ts-563 Nas. The disks 4 and 5 dropped down and then try to power on continuously
I wrote to helpdesk and the answer was RMA with a charge of 250USD
My Nas is out of warranty so I decided to try this solution
Can you send me your guide to avoid the problem to scripter.snow @ gmail.com?
Thanks a lot

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

Post by dolbyman » Sat Nov 02, 2019 5:50 am

no need for email, problem solving was explained earlier in the thread

Set Shagrat
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Re: "Disk Failed", then "Disk Unplugged" errors

Post by Set Shagrat » Sat Nov 02, 2019 4:54 pm

dolbyman wrote:
Sat Nov 02, 2019 5:50 am
no need for email, problem solving was explained earlier in the thread
Oh sorry I've skipped some posts
Thanks a lot

dwg42
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Re: "Disk Failed", then "Disk Unplugged" errors

Post by dwg42 » Thu Nov 07, 2019 7:52 pm

way to familiar - just out of warranty, mid october disk 3, 4 & 5 not found on my tvs-873 - with a remote session from qnap it was determined ....

"Thank you for the session today. As it turns out, your back plane is defective. We have this part for repair out of warranty. The cost will be $590."

it seems i have 3 options, repair without warranty, a new nas with a $1200 loss and additional cost of whatever nas i pick, or fix it myself(probably not a good idea). i have asked qnap about a 4th option but days later no answer, maybe some one on this forum can answer if this $200 option would work.

if i buy a "QNAP TR-004 4-Bay USB 3.0 RAID Expansion Enclosure" ($199 ) will this allow me to get to my data and utilize the "tvs 873" and operate normally?

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