December 2002
Intermediate to advanced
260 pages
9h 18m
English
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JBOD (Just a Bunch Of Disks)
JBOD refers to the single-disk operating mode that many hardware RAID controllers support. With JBOD mode, the controller is able to circumvent RAID firmware and treat a single hard disk as a normal disk controller would. This is useful when you have disks that you want to configure without RAID support, but that you want to connect to a RAID controller. If your controller does not support JBOD, then you would need to use a standard disk controller to connect non-RAID disks, resulting in additional hardware spending and the use of another expansion slot.
I have seen some instances where the term JBOD is used interchangeably with terms like linear mode, disk spanning, and concatenation. When I use it throughout this book, I mean it in the context described here: a standalone disk connected to a RAID controller.
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