As we are going to recover lost data from the external drive that used to be part of Xserve RAID array, you can save the downloaded Disk Drill application to your Mac's main system volume. Follow this link to download Disk Drill, double-click the disk image and then drag the Disk Drill icon to the Applications folder on your Mac.
If you’re worried you might have to go through Xserve data recovery on your Apple MacBook in the future, check out Disk Drill’s data protection features: Guaranteed Recovery and Recovery Vault. With these options turned on, restoring data from Xserve RAID will be a breeze.
When Deep Scan analyzes a drive for lost data, the actual file system the drive is formatted into is not important. In fact, the disk may have no file system or it may be completely lost.
Deep Scan reads the disk differently and tries to locate any scavengable data, no matter if it previously resided on FAT, NTFS, or other system.
Once a known data pattern is recognized, the files get reconstructed. Here are just a few samples of formats Deep Scan works with: .jpg, .doc, .psd, .pdf or .xls, etc.