|The Cray J916 with the front doors and many of the filler panels removed.|
The Peripheral Cabinet is moderately configured with plenty of space for expansion. In the center is the I/O Subsystem VME Chassis which contains two VME backplanes. Each contains a SPARC single-board computer which functions as an I/O Processor (IOP.) The remaining VME slots contain the system interfaces including Ethernet, disk controllers, and the I/O Buffer Boards (IOBB) that transfer data from peripherals to the J90 processors and memory. At the bottom are two disk arrays.
|The VME Chassis.|
- IOP0 - the Master I/O Processor
- IOBB-64 - which is cabled to the J90 processor via the first Y1 Channel
- EI-1 - the system Ethernet
- DC-6S - dual SCSI disk controller
- IOP1 - a Slave I/O Processor
- IOBB-64 - which is cabled to the J90 processor via the second Y1 Channel
- DC-5I - dual IPI disk controller
|The disk arrays, partially opened.|
The PE-10I disk array contains four Intelligent Peripheral Interface ST43200K drives. These are 3.GB each with, again, only two drives on each of the two buses. They have a higher throughput than the SCSI drives.