Sun Microsystems A3500 manual Configuration Guidelines

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1.1Configuration Guidelines

Use the following guidelines for installing and cabling or reconfiguring your system.

■Do not exceed a SCSI bus length of 25 meters.

■Make sure that the last Sun StorEdge A3000 controller module in any daisy chain has a total of two terminators, one in each SCSI OUT port.

■If you are adding a controller module to an already existing configuration, halt all activity on the SCSI bus before removing any SCSI cables.

■Once you finish cabling the devices and powering on, reboot the system by typing boot -rat the ok prompt before beginning any SCSI bus activity.

Perform a system check to make sure that SCSI connections are secure. Look for fault LEDs on the hardware or error messages in the RAID Manager GUI.

Note –Refer to your server and rack documentation for instructions on grounding the StorEdge A3500 cabinet.

1-2Sun StorEdge A3500 Hardware Configuration Guide • September 1998

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Contents Sun StorEdge A3500 Hardware Configuration Guide Page Contents Iv Sun StorEdge A3500 Hardware Configuration Guide September Using Unix Commands PrefaceTable P-1Typographic Conventions Typographic ConventionsShell Prompts Table P-2Shell PromptsSun Welcomes Your Comments Related DocumentationSun Documentation on the Web Table P-3Related DocumentationPage Host Connections Configuration Guidelines Supported Host Configurations Single HostDaisy Chain Independent Controller 4Two-Node Multi-Initiator Configuration Multi-InitiatorUltra 2 Host System-Power Connection Requirement 5AC Power Sequencers-Ultra 2 Power ConnectorGain access to the AC power sequencers StorEdge A3500 Configurations StorEdge D1000 Disk Array Settings Rear1 1x2 Configuration Option Switch1x2 Module ID Switch Settings Module ID SwitchScsi Jumper Cables and Terminators 2 1x5 Configuration 51x5 Option Switch Settings for StorEdge D1000 Disk Array11x5 Module ID Switch Settings 3 2x7 Configuration 82x7 Option Switch Settings for StorEdge D1000 Disk Array22x7 Module ID Switch Settings 33x15 Module ID Switch Settings 4 3x15 Configuration43x15 Module ID Switch Settings 10Sun StorEdge A3500 Hardware Configuration Guide September Cable Lengths 1x2 CablingScsi Cabling 5Controller Module aScsi Connections 11One A3000 Controller Module and Two D1000 Disk Arrays ScsiPower Connections 1x5 Cabling 6Controller Module aDifferential Scsi terminator Scsi jumper cable Rear view R6R4 Front sequencer R1&R2 Rear sequencer L1&L2 7Controller Module a 2x7 Cabling8Controller Module B Controller Module a Controller Module B Front Sequencer Rear 3x15 Cabling 10Controller Module B Controller Module a11Controller Module C Scsi Connections for Controller Module a 3x15 Controller Module aScsi Connections for Controller Module B 203x15 Controller Module BScsi Connections for Controller Module C 213x15 Controller Module CConnecting to AC Power Source Power Sequencer Interconnections2x71x8 Phase a Power connections for the 1x8 cabinet are shown in Figure 28Sun StorEdge A3500 Hardware Configuration Guide September