At Calidade Systems we check our customer daily backup report. Today we detect the lack of one report.
We connect to our customer Linux server and saw a unusual high CPU load but no processor usage, if we don’t have cpu usage the cause should be storage, we are sending backups to a NFS server, Our linux server had lost nfs connection and was having problems trying to reconnect to server.
we tried to umount NFS share but we get a device busy message.
we need to force this umount with
umount.nfs -f -l /mount/point
-f to force
-l to make a lazy umount
now we can remount our nfs