Hi to all

I have a Big Problem with a Raid 5 system.
The raid 5 system set is composed by 8 HD, 1 Tb each one, no spare disk.
I have had a Black out problem.
After this event, at server restart, the system reports "no Volume is available".
I'm using Areca arc-1220

The Hierarchy is :

Raid Set # 00
Ch01
Missing
Missing
Missing
Ch05
Ch06
Ch07
Ch08

Raid Set # 00
Missing
Ch02
Ch03
Ch04
Missing
Missing
Failed
Failed

IDE Channels

Ch01 Raid Set # 00 1000.2GB Hitachi HUA721010KLA330
Ch02 Raid Set # 00 1000.2GB Hitachi HUA721010KLA330
Ch03 Raid Set # 00 1000.2GB Hitachi HUA721010KLA330
Ch04 Raid Set # 00 1000.2GB Hitachi HUA721010KLA330
Ch05 Raid Set # 00 1000.2GB Hitachi HUA721010KLA330
Ch06 Raid Set # 00 1000.2GB Hitachi HUA721010KLA330
Ch07 Raid Set # 00 1000.2GB Hitachi HUA721010KLA330
Ch08 Raid Set # 00 1000.2GB Hitachi HUA721010KLA330

I have a lot of video files on this.
Please, how to recover the Raid set?

Best Regards
Nanni