We recently had what appears to be an unrecoverable failure with one of our DX4000 4-drive boxes. After multiple attempts to do a System Restore with a USB key we could not get beyond an system failure error message (0x9) on the LED readout.
WD kindly sent a new box, we plugged in the 4 drives from the failed box and got the same message, and the same inability to restore the OS. The conclusion from this is a disk issue affecting the OS that could not be be fixed, somewhat surprising for a RAID drive. I suspect a problem with corruption of the OS and/or a problem with the OS partition.
WD Support suggested we try to read the drives with a Linux OS, so we used software from Diskinternals that claims to read a Linux drive (connected through a USB-SATA drive adapter) but that showed unreadable Linux partitions for all four drives. This is probably not a suprise for RAID drives.
To make a long story short, we assembled a virtual RAID configuration by attaching all four drives through USB ports on one computer and, with the Diskinternals RAID Recovery software we were able to extract the contents of the Client Computer Backups folder on D: drive to another, large single SATA drive.
Now what? Does this one folder have all the necessary data to enumerate the different computers and backups involved in the data? Can we just copy the contents to one of our new DX4000 devices and see all the backups? Or, do we need to try and extract more files from the old drives?
Thanks for any ideas. A little concerned going forward, so I guess we will need to backup the backups somewhere, but then we have the same issue: how much do we need to baclup to be able to do a restore from a failed DX4000?