parity and disk 1 errors

[Jobine]

Hi,

 

I have errors on my parity disk and my disk 1. Is there a preference for replacing ...

Disk 1 and after parity or Parity and after Disk 1?

 

Thank,

[Jobine]

I decided to replace my disc 1 first. I have turn off the server and replaced the disk.
In array operations, I don't have the message to rebuild

Any idea ?

Edited December 25, 2020 by Jobine

[itimpi]

If you have 2 disks marked as disabled then there is no automated recovery operation.    If you meant to say they were showing errors but had not been marked with a red ‘x’ to indicate they were disabled then we need more information about the state of your system to give advice.   Providing your system’s diagnostics zip file (obtained via Tools => Diagnostics) might help us see the current state of your system.

[Jobine]

Thank for your help.

The errors come from my parity disk and disk 1. After a reboot the errors are gone.

I also have disk 7, which I disabled (mark with a red X) because it had too many errors, after manually moving the data. It's still in the server. I can reactivate it

Here's my diagnostic file.

Thank and Merry Christmas.

serveur-diagnostics-20201225-0954.zip

[JorgeB]

If it happens again grab diags before rebooting, multiple disk errors are usually not a disk problem, disk7 is failing though, assuming it's the currently unassigned WD.

[Jobine]

So am I waiting for more errors?

Do I reactivate disk 7?

 

Thank,

[JorgeB]

20 hours ago, Jobine said:

Do I reactivate disk 7?

Yes, but using a new disk.

[Jobine]

It is disabled and it has nothing on it.

Can I just remove it?

[Jobine]

How can I replace the parity disk and disk 1, which have errors. And remove disk 7 from my array?

[JorgeB]

You can try doing a new config, don't assign disk7, assign a new parity and re-sync parity, but if disk1 is also failing there will be some errors.

[Jobine]

I have a lot of information, I don't want to lose it all

[JorgeB]

Single parity can't protect from a dual disk failure, though unlikely to lose it all, but expect some data loss, what I described above is IMHO the best way forward.

[Jobine]

Yes, but if a make a new config, I lost all my data ?

Or how exactly I can proceed ?

Thank,

[JorgeB]

21 minutes ago, Jobine said:

but if a make a new config, I lost all my data ?

No, new config keeps all the data, you'll lose any data in the disabled disk7, but according to you there's nothing there.

[ChatNoir]

You will not loose the data from the drive that have no problem.

[Jobine]

What's the exactly best way to do it ? (remove disk7, change parity 1 and disk 1)

1- Stop the server and change parity drive (should I change it right now ?)

2- Start the server

3- Stop the Array

4- Use Tools - New config

5- In the New config - Preserve current assignments, which one should I choose ?

• None
• All
• Parity disk
• Data slots
• Cache slots

6- Should I replace the parity disk first, or at this moment ? or remove disk 7 from the array ?

 

I'm lost for the logical order without losing any data...

 

Thank for your help.

[JorgeB]

3 minutes ago, Jobine said:

without losing any data...

Some data loss is expected:

On 12/29/2020 at 2:56 PM, JorgeB said:

Single parity can't protect from a dual disk failure,

Best bet to recover as much data as possible is to clone disk1 to a new disk using ddrescue, then do a new config with the clone and the remaining disks, run an extended SMART test on parity, if it fails replace it also.

[Jobine]

In doubt, I checked my disk 7 ... Why is there new data if it's not part of the array?

[JorgeB]

Don't understand what you mean, if you mean the emulated disk7 it's still part of the array, if you mean the old disk it will have whatever data it was there.

[Jobine]

I have enough space to move my disk7 data to the others.

but I really don't understand why I have data here  It is identified as not installed

 

And after, What should I do ?

 

I really appreciate your help ...

 

 

 

[Jobine]

2 minutes ago, JorgeB said:

Don't understand what you mean, if you mean the emulated disk7 it's still part of the array, if you mean the old disk it will have whatever data it was there.

When I connect to disk7 with Krusader, is there data from yesterday on it, but it's been several months since I took it out of the array.

[itimpi]

1 hour ago, Jobine said:

When I connect to disk7 with Krusader, is there data from yesterday on it, but it's been several months since I took it out of the array.

When you removed the disk UnRAID started emulating it using the combination of the other data drives plus the parity drive.   Unraid is therefore treating it as if it is a ‘failed’ disk, and when you replace it with a physical disk UnRAID will rebuild onto that disk what it thinks should be there I.r. The contents of the emulated disk).

 

[Jobine]

Thank,

Currently, I'm copying the data to the other disks.

 

But after, how I remove disk7 completely from the array ?

[trurl]

After there is no data left on the emulated disk7, you would have to New Config without that disk and rebuild parity.

[Jobine]

I had errors on the parity. I did a SMART test and everything is ok.

 

In the New config - Preserve current assignments, which one should I choose ?

None

All

Parity disk

Data slots

Cache slots

 

Thank,