Unplugged wrong disks in DS2419+

Today, made a mistake, unplugged wrong disk in DS2419+, and caused it hang. At that time, I was moving 3 shared folders as well.

After hard reboot, everything back to orginal, I'm quite suprise, this is the second time I unplugged wrong disk in Synology NAS. Quite happy with this product, only one issue for me, they can not handle disk with bad sector well.