User`s guide

• Route the other end of the SCSI–P cable to the host.
If you use a desktop DWZZA–AA signal converter, do the following:
• Plug the SCSI host port cable coming from the controller’s trilink into the
connector on the front of the DWZZA–AA signal converter.
• Plug another SCSI host port cable into the back of the DWZZA and route
the cable to the host.
5. For 16-bit FWD adapters, route the host port cable directly from the
controller’s trilink connector, through the cabinet, and to the host port
adapter.
Refer to the StorageWorks Solutions Shelf and SBB User’s Guide for detailed
information on DWZZA-series SCSI bus signal converters. Refer to the
StorageWorks Solutions Configuration Guide for information on the H885–AA
trilink connector block.
Two important considerations for all SCSI buses are bus termination and
bus length. Each bus must be terminated at each end of the bus. Maximum
bus lengths must be taken into consideration when designing your subsystem
configuration.
When removing SCSI host port cables, always remove the trilink connector with
the host port cables and terminator attached to maintain the SCSI termination.
4.7 Creating a Dual-Redundant HS Array Controller Configuration
For HSOF versions prior to Version 1.4, you had to shut down the first controller
in the controller shelf in order to install the second controller to create a dual-
redundant configuration. For HSJ array controllers with firmware Version
1.4 and higher, a second controller can be added to create a dual-redundant
configuration using the Controller Warm Swap Utility (C_SWAP).
For HSD30 and HSZ array controllers, the Controller Warm Swap Utility can
be used to create a dual-redundant configuration provided you use (HSOF)
firmware Version 2.0 or higher and an operating system version that supports
dual-redundant HS array controller failover.
Note
Ensure that your HSD30 array controller’s host port connector has mating
guides installed before using the C_SWAP procedure. Failing to do so
risks shorting circuits that may blow fuses on all the devices on the DSSI
bus.
The C_SWAP utility was designed for the replacement of controller and/or cache
modules in dual-redundant controller configurations. This program allows you
to replace modules with power applied to the controller shelf. C_SWAP also is
used for adding new controller and cache modules to a preexisting nonredundant
controller configuration to form a dual-redundant configuration.
Section 5.11 describes how to use the Controller Warm Swap utility (C_SWAP).
Section 5.14 provides instructions for adding a controller module and a cache
module when the C_SWAP program prompts you to do so.
4–24 Installation