In this situation, we can practically guarantee a 100% successful recovery.
Problems start developing when the RAID or IT administrator attempts RAID recovery, by continually restarting the device, or removing and replacing hard drives, or even doing the unthinkable and placing suspect drives in a freezer for a few hours.
As we never fail to mention, it is this sort of action that can be responsible for total, permanent data loss.
A corrupt RAID array, with corrupt file system or damaged RAID parameters cannot be magically brought back to life by experimental recovery. It can, however, be rendered utterly useless.
It’s a tough call for the user; try and save a few thousand by doing it yourself, with the inherent risk of permanent damage, or contact a professional RAID recovery company, knowing that you are going to get everything back intact, albeit with lighter pockets.
We are aware of a few companies that approached us in recent years with unrecoverable RAID systems damaged by their user or administrator. Most of them, unfortunately, ceased trading soon thereafter. It’s heartbreaking for us; saving the company would have been extremely straightforward.