Compaq 3000 manual Host I/O Module, Device I/O Module Blower Status LEDs

RAID Array 3000 Controller Shelf

Figure 1–6 Device I/O Module Blower Status LEDs

Left	SCSI Bus
Blower	Address Switch S3
LED	(Not Used)
Right	SCSI Bus
Blower
LED	Termination
	Switch S4
	SHR-1046

NOTE

The SCSI bus address switch on the Controller Shelf device I/O module does not control the tar- get addresses of the SBB slots in the Device Ex- pansion Shelves. This switch has been electrically disabled by design. Refer to the StorageWorks SBB Shelf I/O Module User’s Guide supplied with the Device Expansion Shelf for a description of how to set the SCSI IDs in each shelf.

SCSI bus termination switch S4 configures the SCSI bus termination of the De- vice Expansion Shelves in the RAID Array 3000 storage system. The proper set- tings for S4 are included in the cabling procedures in Chapter 3 of this guide.

1.5.3 Host I/O Module

The Controller Shelf contains two identical Host I/O modules (see Figure 1–7). The module located directly to the left of the device I/O module is designated as H1 and the module in the adjacent slot as H0. The host I/O module provides the interface between the host bus and the controller(s) in the shelf.

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