Raid 1 Mirror - For Redundancy; Jbod - IEI Technology WSB-9152 User Manual

7.11.2 RAID 1 Mirror – For Redundancy
RAID 1 mirrors data over both disks RAID array. RAID 1 allows redundancy so data can
be restored if one of the disks fails. There is a negligible performance difference between
a RAID 1 array and a normal drive.

7.11.3 JBOD

JBOD allows a bunch of hard disks to be seen as one large disk. Unlike RAID 0, there is
no performance advantage. Data that is on the failed drive is unrecoverable.
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