Replacing a failing hard drive

Godrick · Post by **Godrick** » Thu Jul 06, 2017 4:19 am

I have a TVS-682T. One of the 4 RAID 6 hard drives is indicating a SMART error (Current_Pending_Sector 16). I take this to mean that 16 sectors cannot be read. Both the long and the short disk tests show no errors.

The dashboard says that the drive is not in the best state. I have a replacement drive of the same type.

How do I go about replacing it?

The manual says:

Important: Do not install a new drive when the system is not in degraded mode [which it isn't], otherwise you may encounter unexpected system failures.

Should I just shut the QNAP down and replace the drive, or how swap it, eg?

dolbyman · Post by **dolbyman** » Thu Jul 06, 2017 4:33 am

take the faulty drive out while running (it will beep indicating it is degraded) and then put the new drive in

all while running..do not shut it down

Moogle Stiltzkin · Post by **Moogle Stiltzkin** » Thu Jul 06, 2017 4:45 am

theres a video guide in my FAQ url in my signature for replacing hard drive.

dolbyman wrote:take the faulty drive out while running (it will beep indicating it is degraded) and then put the new drive in

all while running..do not shut it down

by the way i did this before in a 5 and 6 bay for raid5 and raid6.

but in video tutorial for hdd replacement they said to go storage manager click the buttons before swap out in turns. what exactly is the difference between the 2 methods?

Godrick · Post by **Godrick** » Thu Jul 06, 2017 5:23 am

Thanks! I had not spotted that replace disk option.

dolbyman · Post by **dolbyman** » Thu Jul 06, 2017 1:05 pm

i guess the buttons would be useful if you cold swap the drives ...

maybe it would also stop you from replacing the wrong drive on degraded raid ?

Moogle Stiltzkin · Post by **Moogle Stiltzkin** » Thu Jul 06, 2017 3:04 pm

dolbyman wrote:i guess the buttons would be useful if you cold swap the drives ...

maybe it would also stop you from replacing the wrong drive on degraded raid ?

yeah that makes sense. i was wondering if doing it their way would mean faster rebuild, but maybe not.

the hot swap worked fine for me, also less fiddling with qts, as long as it gets the same job done

Godrick · Post by **Godrick** » Thu Jul 06, 2017 8:07 pm

dolbyman wrote:take the faulty drive out while running (it will beep indicating it is degraded) and then put the new drive in

all while running..do not shut it down

Errr ... the reason that I asked the question was that the manual says that you shouldn't do that, unless the raid is degraded, which it isn't.

dolbyman · Post by **dolbyman** » Thu Jul 06, 2017 9:41 pm

taking the drive out while running, WILL degrade the raid (the beep)

it will NOT while shut down

ben79 · Post by **ben79** » Sat Jul 22, 2017 2:31 pm

Hello!

I'm in a similar situation to this. My QNAP has started showing the Current_Pending_Sector SMART error.

So the drive hasn't failed, yet and the RAID5 is still in place. I'm only using 3 drives on RAID5.

I have an identical replacement disk, but instead of replacing the failing drive first, I'm thinking I should add the drive as a 4th disk and migrate from RAID5 to RAID6 -- then replace the faulty drive.

Does that sound okay, or does can anyone suggest what my next step should be?

Did the OP end up just end up pulling out the failing drive and doing a hot-swap?

Ben

Don · Post by **Don** » Sat Jul 22, 2017 3:17 pm

Bad idea. Replaced the failing drive first.

ben79 · Post by **ben79** » Sat Jul 22, 2017 7:41 pm

Hi Don,

I thought it would be better to have the RAID 5 redundancy in place while all the drives were still functioning and let the NAS built the additional redundancy I would get with RAID 6. Today I've read a lot of posts and articles about other drives failing during a RAID 5 rebuild and people losing everything.

EDIT: I'd rather not have to restore from a backup!

Godrick · Post by **Godrick** » Mon Jul 24, 2017 1:13 am

Op just went to the menu for adding disks, which also allows them to be replaced, one at a time. Seemed to do the job. New disk rattles much less.

dynek · Post by **dynek** » Mon Sep 18, 2017 10:23 pm

I'm running 4.3 and I can't seem to find a menu to add/replace disk.
Where is it located?

Thanks

jey328 · Post by **jey328** » Fri Nov 30, 2018 10:17 am

On 4.3.3 it’s at Storage Mgr>Storage Space>Manage>Manage Dropdown

All discs are greyed out though when all services are running.
You can still replace a “Failing Drive” or even “Good Drive” by unplugging one of the drives - this will send Qnap to “Degraded Mode” once it is, just hot seap with the new drive.
I hope this is clearer to all readers. Thanks!

kalantan · Post by **kalantan** » Sun Jan 12, 2020 1:15 am

Hi - a QNAP TVS-682T here: QNAP reported Host Drive 3 as having a controller issue. Was ready to update my backup of the files from the QNAP before replacing the bad drive and rebooted it. Now it reports Drive 3 as being OK. My instinct is to replace it anyway as all copying to the RAID (via Ethernet CAT 7) is now VERY slow. Any thoughts? Thanks!

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