Today I had problems copying files from my Synology NAS. Browsing the directories was fine but copying files resulted in I/O error. No errors in any logs (dmesg, /var/log/messages)

The kernel is not built with rpc debugging available so I couldn't look further in to the cause.

 

Armbian 5.26 didn't work

Armbian 5.25 didn't work

 

I Downgraded all the way back to 5.23 (kernel 4.8.4) and everything works perfectly.

 

I upgraded from 5.23 to 5.32 and it still doesn't work.

 

I get Input/Output errors

root@cubie:~# mv /mnt/data/file .
mv: cannot open ‘/mnt/data/file’ for reading: Input/output error

/mnt/data is an NFS share from a Synology NAS.

I don't have these problems on any other machine except Armbian with a recent mainline kernel

 

I've downgraded to 5.23 and it's working again.

Check nfs versions.

... and provide more info - server and client logs, mount options, ...

That was the extent of the logs. There's nothing in syslog or /var/log/messages

 

It's NFSv4

 

I've had no end of trouble tonight too... not sure hat triggered it. Been getting the same Error 5 sometimes and a File Locked error too

 

The server is a Synology DS215j

 

I've just switched the mounts to NFSv3 and it seems to be working again