Replace a disk from a degraded pool (disk physically not detected)

[ManuMCoupe]

Hi

I just figure out that i have a degraded NAS from a month ago.
One of the 4 disk that i have in my array is not responding. It's physically broken (strange sounds)

My configuration is:

- HP Proliant ML310e Gen8 v2
- 32gb ram
- Freenas 11.3
- 4X WD Red 6TB EFRX

I just bought another disk to replace the faulty

But, in that case i can't put the faulty disk in "offline" mode because is not recognized physically

What is the correct procedure in that case?

Thanks

 

[danb35]

But, in that case i can't put the faulty disk in "offline" mode because is not recognized physically

The disk is already offline. Proceed with the replacement as instructed in the manual.

 

[ManuMCoupe]

The disk is already offline. Proceed with the replacement as instructed in the manual.

Thanks
So the new one will be tagged as offline automatically?

 

[danb35]

So the new one will be tagged as offline automatically?

It already is. Look at the pool status page in the GUI.

 

[Samuel Tai]

The new disk will be recognized as unused. It won't come online until you start the replacement process.

 

[ManuMCoupe]

Thanks for these quick responses! Very useful

 

[Yorick]

I just bought another disk to replace the faulty

What did you buy? If it's a WD Red 4TB EFAX, read this and consider your options: https://www.ixsystems.com/community/threads/WD-SMR-iX-Statement/

WD reportedly will RMA a 2-6TB EFAX drive with EFRX for people running ZFS or having other severe performance issues.

 

[ManuMCoupe]

What did you buy? If it's a WD Red 4TB EFAX, read this and consider your options: https://www.ixsystems.com/community/threads/WD-SMR-iX-Statement/

WD reportedly will RMA a 2-6TB EFAX drive with EFRX for people running ZFS or having other severe performance issues.

Yes, I read it before.

I purchased another efrx. It was difficult to get one, and I took the last one from an online store.

 

[ManuMCoupe]

The new disk will be recognized as unused. It won't come online until you start the replacement process.

Just as you say, i just replace the failed disk by a new one and it's shown as unused..

And i hace no option of "replace" in that case

New disk is not shown in pool...

What can i do?

Thanks

 

[Samuel Tai]

1. Go to the pool status.
2. Find the old disk. It should be in OFFLINE status.
3. Click the 3 dots, and pull down to replace.
4. In the replace dialog, pull down to find the unused disk.
5. Click the "Replace" button.

 

[ManuMCoupe]

1. Go to the pool status.
2. Find the old disk. It should be in OFFLINE status.
3. Click the 3 dots, and pull down to replace.
4. In the replace dialog, pull down to find the unused disk.
5. Click the "Replace" button.

There?

Disk is not shown as ada0

Thanks again

 

[Samuel Tai]

Yes, click the 3 dots on the unavail member of the pool.

 

[diedrichg]

Try a different SATA cable for the drive as well. Start with the old drive attached first with the new cable, then try the new drive.

 

[danb35]

Disk is not shown as ada0

No, it isn't. That's because it isn't ada0. It's a different disk that the system used to see as ada0, but now it doesn't see at all. You're making this much more complicated than it needs to be.

 

[ManuMCoupe]

No, it isn't. That's because it isn't ada0. It's a different disk that the system used to see as ada0, but now it doesn't see at all. You're making this much more complicated than it needs to be.

Ok, sorry but i want to be sure before doing something :-S It's the first time that i have a crash disk

So, as Samuel says, i only to have to put this "/dev/gptid/2f7fb047-b7f9-11e7-b3e0-10604beedcec " from "unavail" to "replace" ?

Right?

Thanks

 

[Samuel Tai]

Correct. What you're telling the GUI is you're beginning the replacement process for the missing disk with gptid. Then in the replacement dialog, pull down to the available unused disks, which will be the new ada0.

 

[danb35]

So, as Samuel says, i only to have to put this "/dev/gptid/2f7fb047-b7f9-11e7-b3e0-10604beedcec " from "unused" to "replace" ?

"/dev/gptid/2f7fb047-b7f9-11e7-b3e0-10604beedcec" isn't "unused"; it's unavailable (for purposes of this process, "UNAVAIL" is the same as "OFFLINE"). Your system can't see it any more. Either you've removed it from the system (which I think you have), or it's there but so dead it isn't responding any more. You want to replace that disk with ada0, which is your new disk. To do that, do exactly what Samuel said to do (twice).

 

[ManuMCoupe]

Correct. What you're telling the GUI is you're beginning the replacement process for the missing disk with gptid. Then in the replacement dialog, pull down to the available unused disks, which will be the new ada0.

"/dev/gptid/2f7fb047-b7f9-11e7-b3e0-10604beedcec" isn't "unused"; it's unavailable (for purposes of this process, "UNAVAIL" is the same as "OFFLINE"). Your system can't see it any more. Either you've removed it from the system (which I think you have), or it's there but so dead it isn't responding any more. You want to replace that disk with ada0, which is your new disk. To do that, do exactly what Samuel said to do (twice).

Thanks for all guys