I'm trying to shrink my array while preserving parity on v6.12.13. Per the wiki, I need to

rm -rf /mnt/disk1/
mkdir /mnt/disk1/clear-me

 

but I experience

 

root@Tower:~# du -h /mnt/disk1/
1.0K    /mnt/disk1/root
1.0K    /mnt/disk1/.Trash-99
2.5K    /mnt/disk1/
root@Tower:~# du -h /mnt/disk2/
1.0K    /mnt/disk2/root
1.5K    /mnt/disk2/
root@Tower:/# rm -rf /mnt/disk1/
rm: cannot remove '/mnt/disk1/root': Device or resource busy
rm: cannot remove '/mnt/disk1/.Trash-99': Device or resource busy
root@Tower:/# rm -rf /mnt/disk2/
rm: cannot remove '/mnt/disk2/root': Device or resource busy

 

despite no processes

 

root@Tower:~# lsof | grep /mnt/disk1
root@Tower:~# lsof | grep /mnt/disk2
root@Tower:~# pwd
/root

 

root is my share, which only inlcudes a different disk I copied to. I don't exlcude these disks, per the guide. Nonetheless, this is because the array is not stopped.

 

root@Tower:/# fuser -mv /mnt/disk1
                     USER        PID ACCESS COMMAND
/mnt/disk1:          root     kernel mount /mnt/disk1
root@Tower:/# fuser -mv /mnt/disk2
                     USER        PID ACCESS COMMAND
/mnt/disk2:          root     kernel mount /mnt/disk2

 

 So, I need to unmount the disks to fully clear them. Would this invalidate parity? I'm also trying to avoid the tedium of formatting disks.

 

 

Edited November 5, 20241 yr by inkindar

The clear script doesn't work correctly with current releases, if you still want to use that method, do it the manual way:

 

https://forums.lime-technology.com/topic/61614-shrink-array-question/?tab=comments#comment-606335

14 minutes ago, JorgeB said:

The clear script doesn't work correctly with current releases, if you still want to use that method, do it the manual way:

 

https://forums.lime-technology.com/topic/61614-shrink-array-question/?tab=comments#comment-606335

 

So it would seem the quickest way is to format these disks to be removed & then reconfig the array with valid parity?

The quickest way would be to do a new config and re-sync parity, though that won't format the removed disks, but you can do that later with UD.

I should've clarified: quickest way with parity preserved? As I understand, the above wouldn't.

To preserve parity you would need to clear one disk at a time, and when all are cleared, do a new config without those disks.