Daisy Chain | Sun Microsystems A3500 specification

1.2.2Daisy Chain

You can daisy chain controller modules in the same or separate cabinets.

SCSI cables	Differential SCSI
	terminators

FIGURE 1-2Two Sun StorEdge A3000 Controller Modules Daisy Chained to One Host

Note –The SCSI cables between the two controller modules are crossed to prevent the SCSI IDs for the controllers from conflicting.

1-4Sun StorEdge A3500 Hardware Configuration Guide • September 1998

Image 12

Sun Microsystems A3500 manual Daisy Chain

Contents

Sun StorEdge A3500 Hardware Configuration Guide Page Contents Iv Sun StorEdge A3500 Hardware Configuration Guide September Using Unix Commands Preface Typographic Conventions Shell PromptsTable P-1Typographic Conventions Table P-2Shell Prompts Related Documentation Sun Documentation on the WebSun Welcomes Your Comments Table P-3Related DocumentationPage Host Connections Configuration Guidelines Supported Host Configurations Single Host Daisy Chain Independent Controller 4Two-Node Multi-Initiator Configuration Multi-Initiator Ultra 2 Host System-Power Connection Requirement 5AC Power Sequencers-Ultra 2 Power Connector Gain access to the AC power sequencers StorEdge A3500 Configurations StorEdge D1000 Disk Array Settings Rear 1 1x2 Configuration Option Switch Module ID Switch 1x2 Module ID Switch SettingsScsi Jumper Cables and Terminators 2 1x5 Configuration 51x5 Option Switch Settings for StorEdge D1000 Disk Array 11x5 Module ID Switch Settings 3 2x7 Configuration 82x7 Option Switch Settings for StorEdge D1000 Disk Array 22x7 Module ID Switch Settings 4 3x15 Configuration 33x15 Module ID Switch Settings43x15 Module ID Switch Settings 10Sun StorEdge A3500 Hardware Configuration Guide September 1x2 Cabling Scsi CablingCable Lengths 5Controller Module a Scsi Connections 11One A3000 Controller Module and Two D1000 Disk Arrays Scsi Power Connections 1x5 Cabling 6Controller Module a Differential Scsi terminator Scsi jumper cable Rear view R6R4 Front sequencer R1&R2 Rear sequencer L1&L2 2x7 Cabling 7Controller Module a8Controller Module B Controller Module a Controller Module B Front Sequencer Rear 3x15 Cabling Controller Module a 10Controller Module B11Controller Module C Scsi Connections for Controller Module a 3x15 Controller Module a Scsi Connections for Controller Module B 203x15 Controller Module B Scsi Connections for Controller Module C 213x15 Controller Module C Connecting to AC Power Source Power Sequencer Interconnections 2x71x8 Phase a Power connections for the 1x8 cabinet are shown in Figure 28Sun StorEdge A3500 Hardware Configuration Guide September