Host Scsi Reset With Change In Termination Power; Array Scsi; Saf-Te Interface; Saf-Te Subsystem Interface - Sun Microsystems StorEdge D2 Array Best Practices Manual

3.4 Host SCSI Reset with Change in
Termination Power
When a change of termination power is sensed by the ESM (for example, if the SCSI
cable is disconnected), a SCSI bus reset is generated to the host bus followed by an
ESM hardware reset. This feature allows for hot plugging and removal of inactive
host SCSI connections.
In a dual ESM configuration, a SCSI bus reset is generated to the host busses
connected to both ESMs. However, only the ESM which detected the change in
termination power will be reset. A SCSI bus reset will also be generated on all host
busses when an ESM is plugged or unplugged.
3.5

Array SCSI

Two LVD drive side SCSI channel connections are provided through the J1-J3
connectors. The ESM back panel provides LVD mode termination on both channels.
Note that this implies that only LVD drives are supported.
3.6

SAF-TE Interface

The ESM board implements SAF-TE through one LSI LOGIC 53C040 chip. The
operation of this chip is firmware-controlled. The software specification gives the
implementation details.
3.7

SAF-TE Subsystem Interface

The SAF-TE circuit monitors and controls several ESM subsystem signals. The
following signals are directly monitored by the 53C040 chip.
Host Enable
Module_ID
3-2 Sun StorEdge D2 Array Best Practices Guide • January 2002