Compaq EK-SMCPO-UG. C01 manual RAID Array Controller

iv RAID Array 3000 Pedestal Storage Subsystem Hardware User's Guide

Chapter 2

RAID Array Controller

Controller Overview	2-1
Controller Features	2-3
Controller Reset and LED Indicators	2-8
Flexible RAID Set Configuration	2-9
Performance Enhancements	2-10
Custom Components	2-10
Efficient Write and Read Algorithms	2-11
RAID Levels Supported	2-13
RAID 0	2-14
RAID 1	2-16
RAID 0+1	2-16
RAID 4	2-18
RAID 5	2-19
Just a Bunch of Drives (JBOD)	2-21
Redundant Operation	2-21
Initialization	2-21
Message Passing	2-22
Failover	2-22
Environmental	2-22
Backup Power Management	2-22
Voltage Monitoring	2-24
Temperature Monitoring	2-26

Chapter 3

Maintenance

Pedestal Status and Power LEDs	3-2
SBB Status LEDs	3-3
Controller LEDs	3-4
EMU Error Reporting	3-5
EMU Error Conditions	3-6
Replacing Components (FRUs)	3-7
Removing the Pedestal Door	3-8
Replacing an SBB	3-9
Replacing a Power Supply	3-10
Replacing the RAID Array Controller	3-12
Replacing the EMU Board	3-13
Replacing the UPS	3-15
Differential/Wide UltraSCSI Bus	3-15
Reconfiguring the SCSI Bus	3-16
Replacing the Controller Memory Cache Modules	3-20