Compaq 3000 manual Installation and Maintenance, Installation Guidelines

3

Installation and Maintenance

This chapter describes how to install the Controller Shelf in a RETMA or metric-style storage cabinet and then make the cable connections to the UPS, Device Expansion Shelves and host system. The maintenance section describes how to interpret the status of the LEDs on the front panel of the Controller Shelf. The chapter also describes how to replace a Field Replaceable Unit (FRU).

3.1Installation Guidelines

The Controller Shelf installation process consists of mounting the support brack- ets for the specific number of shelves in your subsystem configuration, setting the UltraSCSI bus termination and target ID addresses, and making the power and SCSI cable connections between the rackmount components. The section is divided into four separate cabling procedures, one for each of the number of De- vice Expansion Shelves in your specific subsystem configuration.

CAUTION

To prevent the possible loss of data, always shut- down your subsystem from the StorageWorks Command Console (SWCC). Do not turn off sys- tem power before shutdown is issued. When shutdown is issued from SWCC, the controller first flushes the cache to the disk drive, then stops blinking.

Use the following guidelines when installing the Controller and Device Expan- sion Shelves. They apply to both RETMA and metric cabinet designs.

∙For stability and safety, arrange the components in the cabinet using a bot- tom-up approach.

∙Cable length is critical when locating the shelves in the cabinet. Keep shelves grouped together to minimize cable length problems.

EK–SMCPQ–UG. C01 3–1