System Architecture of Storage Arrays
Click here to download now
Overview: This paper published by Xyratex explains, when the original Fibre Channel Arbitrated Loop specification was drafted it was assumed that the disks used in a system would be connected using a simple daisy chain approach into a logical loop, this is the original Just a Bunch Of Disks (JBOD). The JBOD has the big advantage that it is really simple to design and is not too complex to manufacture either. Once one of the devices on the loop fails or one of the links in the loop is interrupted there is no access to any of the data on any of the disks in the system.