5.4.2 JBOD

Learn about JBOD arrays. (Raw Lesson Content)

Another term that is sometimes used with disk arrays is JBOD which stands for just a bunch of disks. JBOD is not a RAID configuration, but like RAID, configures multiple disks into a single logical storage unit.

• A JBOD configuration creates a single volume using space from two or more disks.
• Spanning is another term for JBOD because the volume spans multiple physical disks.
• Data is not striped between disks, but saved to one or more disks (depending on how the operating system decides to save each file). On a new JBOD configuration, data is typically saved to the first disk until it is full. Additional data is saved to the second disk and so on.
• Disks used within the spanned volume can be of different sizes.
• JBOD uses the entire space available on all disks for data storage (no overhead).
• There are no performance or fault tolerance benefits with JBOD.
• If one drive fails, you might be able to use disk recovery tools to recover data from the remaining disks.

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