JBOD is just bunch of disk where all the disks are installed
in an enclosure with common power supply. There is no controller present in
JBOD and hence it cannot provide any RAID capability. Generally it has either 8
or 16 disks. Server will see each disk as independent disk and each require its
own address.
Standard IO technique like SCSI and FC arbitrated loop can
be used to connect to JBOD. As shown below all disks are connected in a ring to
provide resiliency.
It is similar to the hub topology where are
the devices are connected in half duplex.
Only one device can transmit at a time and hence the total bandwidth is
shared between all devices.
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