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Preinstallation Planning
SCSI Drive Preparation
Prepare the drives for installation as follows:
• Remove any terminators attached to the drive or set any drive termination jumpers to the disabled position.
• Set the SCSI addresses on the drives.
☛
Note
Each drive on a channel must have a unique ID chosen from 0 through 6 or 8 through 15. ID 7 cannot be used as a drive ID because it is reserved for the controller.
• Enable term power on the drives.
Refer to the drive manual for specific information about drive configuration settings.
To get best performance from the controller, the SCSI drives should be equally distributed across the SCSI channels, and the controller’s data transfer rate should be set to the optimum rate for the drives being used.
Mixing Narrow and Wide SCSI Devices
Narrow and Wide SCSI devices must not be mixed on a single channel. If mixing Narrow and Wide SCSI devices is desired, at least one channel must be dedicated to Narrow SCSI, and at least one channel must be dedicated to
Wide SCSI.
Manual Number 775012 2-5
Mixing Narrow and Wide SCSI Devices
2-6 DAC960PG/PJ Installation Guide
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Table of contents
- 2 Please Notice
- 2 Our Policy
- 3 Conventions
- 9 Product Description
- 10 Controller Features and Functions
- 10 Operating System Support
- 10 Standard Package Contents
- 10 Hardware
- 11 Software
- 12 User-supplied Items
- 14 SCSI Termination
- 16 SCSI Cabling
- 17 SCSI Drive Preparation
- 17 Mixing Narrow and Wide SCSI Devices
- 19 Before You Begin
- 20 Connectors and Jumpers
- 22 External SCSI Connectors
- 23 Safety Considerations
- 24 Installing the Controller
- 25 Procedural Overview
- 26 Controller Start-up
- 26 BIOS Start-up Sequence
- 27 Other BIOS Options
- 29 Device Drivers
- 29 Global Array Manager (GAM)
- 29 In Case of Problems
- 31 Product Description
- 31 Features
- 32 Installation
- 34 Operation
- 34 Battery Conditioning Prior to Use
- 34 Set-up – Enabling the Write-Back Cache
- 34 Battery Backup Capacity
- 35 Maintenance
- 35 Removing the Battery Backup Module
- 36 Functional Description
- 36 General Operational Description
- 36 Status Indication
- 37 Battery and Charge Circuit
- 37 Recycling the Battery
- 38 IBBU Specifications
- 38 On-board Battery
- 38 Battery Charge Life
- 38 External Battery
- 38 Module Dimensions
- 38 Environmental
- 39 General Hardware Specifications
- 39 DAC960PG
- 40 DAC960PJ
- 41 Physical and Environmental Specifications
- 43 Error Messages
- 43 Start-up Error Messages
- 43 Drive Check Error Messages
- 44 Aborted Installation
- 45 NVRAM Error
- 45 System Reboot or Power Down Messages
- 47 Class B Compliance
- 48 Declaration of Conformity
- 49 Community of Europe
- 50 Underwriters Laboratories Listed
- 51 Battery Backup Unit
- 51 Cache
- 51 Cache Flush
- 51 Cache Line Size
- 51 Channel
- 51 Consistency Check
- 52 Disk Failure Detection
- 52 Disk Media Error Management
- 52 Drive Groups (or Drive Packs)
- 53 Hot Replacement of Disks (Hot Swap)
- 53 IBBU
- 53 Intelligent Battery Backup Unit
- 53 Logical Drive States
- 53 Online: A Logical Drive is in an “online” state if...
- 54 Critical: A Logical Drive is in a “critical” state...
- 54 Offline: A Logical Drive is in an “offline” state ...
- 54 Logical Drives
- 54 Mirroring
- 54 Pack
- 54 Parity
- 55 RAID
- 55 RAID Levels
- 56 Replacement Table
- 56 Rotated XOR Redundancy
- 56 SCSI Drive
- 57 SCSI Drive States
- 57 Ready: A SCSI disk drive is in a “ready” state if ...
- 57 Online: A SCSI disk drive is in an “online” state ...
- 57 Standby: A SCSI disk drive is in a “standby” state...
- 57 Dead: A SCSI disk drive is in a “dead” state if it...
- 58 Rebuild: A SCSI disk drive is in a “rebuild” state...
- 58 Segment Size
- 58 Session
- 58 Standard Disk Drive
- 58 Standby Replacement of Disks (“Hot Spare”)
- 60 Stripe Order
- 60 Stripe Size
- 60 Stripe Width
- 60 Striping
- 60 System Drives
- 60 Target ID
- 61 Write-Back Cache
- 61 Write Through Cache