Keep three copies of your data on two different types of media, with one copy stored offsite.
Note: This is not for beginners; incorrect MBR writing can permanently destroy the partition table.
Use utilities like CrystalDiskInfo to check the health of individual drives regularly. Replace any drive showing reallocated sectors immediately.
If you are dealing with a failed JBOD array or inaccessible disks, these verified tools are industry standards for data retrieval and partition reconstruction: jbod repair tools.exe
It searches for lost partition headers across your drives to repair the partition table in place.
Once the virtual volume is mounted, the tool allows you to copy the recovered files safely over to an entirely separate, healthy storage drive. Top Software Utilities for JBOD Recovery
If all jbod repair tools.exe -like attempts fail, the issue may be: Keep three copies of your data on two
If one physical drive in the enclosure dies completely, the file system metadata breaks, making the remaining healthy drives unreadable by the operating system.
Sometimes the "glue" that tells your computer how the drives fit together gets corrupted.
Never run a repair tool on the original failing hardware if you can help it. Create "bit-by-bit" images of each drive first. Replace any drive showing reallocated sectors immediately
JBOD is great for maximizing storage space, but it’s high-risk. If you find yourself reaching for repair tools often, it might be time to consider moving to a RAID 5 or RAID 6 setup, which provides the "safety net" that JBOD lacks.
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The software will identify the original order of the disks in the spanning sequence.