When I install OS X 10.9 on iMac the problems started.
To fix the problems I returned to the backup and restored OS X 10.8.5
After restarting with sofware 10.8.5 the Pegasus Promise R4 Raid5 disk was total empty and the name from the disk was changed to MyBook? The disk is working normal but data is gone.
The problem is coming from the program WD drive manager.
This program have take all data away and renamed this drive.
The Promise R4 disk is connected with thunderbolt connector and from there the cable is join over to FireWare 800 and 3 disks are connected 2x my book studio editionII and 1x wd my passport studio with the WD disks no problems but how to recover my data on the Pegasus R4 disk. I have no backup from this data and all movies from the family are on there.
Please help if possible
Thanks in advance...
To fix the problems I returned to the backup and restored OS X 10.8.5
After restarting with sofware 10.8.5 the Pegasus Promise R4 Raid5 disk was total empty and the name from the disk was changed to MyBook? The disk is working normal but data is gone.
The problem is coming from the program WD drive manager.
This program have take all data away and renamed this drive.
The Promise R4 disk is connected with thunderbolt connector and from there the cable is join over to FireWare 800 and 3 disks are connected 2x my book studio editionII and 1x wd my passport studio with the WD disks no problems but how to recover my data on the Pegasus R4 disk. I have no backup from this data and all movies from the family are on there.
Please help if possible

Thanks in advance...