Been using the EX2 ultra for quite a few weeks. Configured Raid1, connected device to my AD, created shares and one ISCSI Taget. Everything went fine and i had file transfer speeds using SMB/CIFS at around 75 to 120 MBit/s.
No additional apps at all are installed
Suddenly, without any configuration change, the performance degrade massively. I’m now happy to get 4.5 MBit/s and additionally the transfer sometimes stops completely. CPU load is shown to be very high for a few secs. top on the console shows up to 99% io while the CPU itself is more or less idle.
What I did so far:
Reset the device to system defaults.
Restored configuration–>no change
Rebuild the RAID1–>no change
I do not have the slightest idea what may cause the problem and how it may be fixed and I am thankful for any suggestion.