So, some days ago i replaced one failed disk with another similiar one, after the rebuild it give me this error "Unmountable: No file System", so after looking in this forum i ended with repairing the filesystem and all started to work as usual, but today i decided to upgrade another disk (still 3tb, like the parity one), and as the last time the new disk gave me the same error "Unmountable: No file System", but the real issue is that the other drive that i replaced some days ago give me another error "Unmountable: Unsupported partition layout"

Is this correlated? can someone explain me what's happening? thanks 

What procedure did you use to upgrade the disk? Did you use the data rebuild procedure? Did you preclear the disks?

Never precleared, the first time I just replaced a failed drive and waited for the rebuild, this time I just replaced a small disk but it can't be rebuilt because of the other drive/disk giving an error, right now I installed back the old small drive because it was working nicely

Unmountable disk after upgrade would point to invalid parity, or errors during the rebuild, do you still have any diags from that?

Old parity and rebuild are error free, right now I'm restarting my nas(it takes a lot of time, I never solved that issue), I want to see if with old drives the array can be started 

Do you run regular parity checks?

Yes, pretty much every week 

My nas finally started up, but unfortunately it says I can't install a smaller replacement disk.

So I'll write a summary 

Day one: replaced one disk, rebuild it and fixed file system, everything seems working fine

Day three :upgraded one disk, turned on the system and the new disk give me this error "Unmountable: No file System" (I still didn't do a 2nd rebuild) and for no reason the disk I replaced the first day give me another error "Unmountable: Unsupported partition layout" and now after I put back the drive I replaced on the third day it says it's too small and can't be used

So I'm screwed? 

You need to post diags after a rebuild and before rebooting when you do the next upgrade.

 

Parity check every week is over kill, once a month is fine.

This is my situation

Disk 2 is the drive i repaced the first day

the other one should be the disk i tried to upgrade

So first of all thanks for your help, i can't understand what i have to do

Post current diags.

this one?

syslog.txt

Tools -> Diagnostics

Ok, should be this one

petere-diagnostics-20191119-1846.zip

Check filesystem on both disks, but this isn't normal, something else is going on, likely hardware related.

Ok I'll check asap, I hope is not hardware related, both of that drives are connected at the motherboard 

Phase 1 - find and verify superblock... bad primary superblock - bad magic number !!! attempting to find secondary superblock... .found candidate secondary superblock... verified secondary superblock... would write modified primary superblock Primary superblock would have been modified. Cannot proceed further in no_modify mode. Exiting now.

 

 

Result of disk 2 after i run a check with the command -n

You need to remove -n (no modify) or nothing will be done.

tried with -L, seems kinda working, but inside the drive almost everything is missing and being replaced with "Lost+found" folder, guess i lost some data

I'm stuck, I can't assign my old 1tb drive to the 3rd disk, if I install a new drive I think parity with that the other corrupted drive will result in a total loss of all data

14 minutes ago, Bedey said:

I can't assign my old 1tb drive to the 3rd disk

To do that you need to do a new config.

I can do that without loosing any data? 

You'd lose any data on the emulated disk3 that doesn't exist on old disk3, i.e., any new data written after the replacement, all the other data will remain as it was, just make sure to assign old parity disk to the parity slot.

I'll try right now 

Well, array is on, how I should procede? Disk 2 data seems unavailable, can be rebuilded? 

I checked pretty much every folder on disk 2, some stuff is still there, some seems lost forever, well better than nothing, but I still have to replace that old 1tb drive with my new 3tb one, how I'm supposed to proceed? Last time everything went badly and I just followed the wiki