Controllers; Mpn Controller (Scs-Lo); Cra Y J916 And Cra Y 1932 Controller (Si-3) - Silicon Graphics DSS-1 Hardware Description

DSS-1 and DSS-2 Hardware Description
Product Overview
Controllers
The DSS-IIDSS-2 may be interfaced to either a computer system that uses a
GigaRing channel for internal system communication or to a CRA Y J90 series
system. Each type of interface requires a different peripheral controller.
MPN Controller (SCS-10)
The SCS-IO or SCS-II peripheral controller that interfaces the DSS-IIDSS-2
to the GigaRing channel is an SBus-based controller in the MPN. The SCS-IO
and SCS-II plug into one of eight SBus slot connectors on the SBus peripheral
interface (SPI) printed circuit board in the MPN. The SCS-I 0 provides a standard
SCSI-2 protocol for transfer of 16-bit differential data to the disk drives; the
SCS-II provides a standard SCSI-3 protocol for transfer of 16-bit differential
data to the disk drives. Each single-channel SCS-IO or SCS-ll provides an
interface connection for up to 15 SCSI devices.
CRAY J916 and CRAY J932 Controller (SI-3)
HMM-199-A
The SI-3 peripheral controller interfaces the
DSS-IIDSS-2 to a CRA Y J90 series
system. The SI-3 is VME-based controller and resides in the VME chassis. Each
SI-3 supports two SCSI-2 channels. Each of these channels can provide an
interface connection for a maximum of 15 SCSI-2 devices. However, for
optimum performance, each channel connects to only two drives in the
DSS-IIDSS-2.
Silicon Graphics Proprietary 13