Dell PowerVault DL2000 DL2000 Hardware Owner's Manual - Page 130

Checking the Equipment, Troubleshooting IRQ Assignment Conflicts

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Table 4-1. Start-Up Routine Indications (continued) Look/listen for: Action The CD drive activity indicator. See "Troubleshooting an Optical Drive" on page 143. The hard-drive activity indicator. See "Troubleshooting a Hard Drive" on page 146. An unfamiliar constant scraping or See "Getting Help" on page 167. grinding sound when you access a drive. Checking the Equipment This section provides troubleshooting procedures for external devices attached to the system, such as the monitor, keyboard, or mouse. Before you perform any of the procedures, see "Troubleshooting External Connections" on page 131. Troubleshooting IRQ Assignment Conflicts Most PCI devices can share an IRQ with another device, but they cannot use an IRQ simultaneously. To avoid this type of conflict, see the documentation for each PCI device for specific IRQ requirements. Table 4-2 lists the IRQ assignments. Table 4-2. IRQ Assignment Defaults IRQ Line Assignment IRQ0 System timer IRQ1 Keyboard controller IRQ2 Interrupt controller 1 to enable IRQ8 through IRQ15 IRQ3 Serial port 2 (COM2 and COM4) IRQ4 Serial port 1 (COM1 and COM3) IRQ5 Remote access controller IRQ6 Diskette drive controller IRQ7 Reserved IRQ8 Real-time clock 130 Troubleshooting Your System

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130
Troubleshooting Your System
Checking the Equipment
This section provides troubleshooting procedures for external devices
attached to the system, such as the monitor, keyboard, or mouse. Before you
perform any of the procedures, see "Troubleshooting External Connections"
on page 131.
Troubleshooting IRQ Assignment Conflicts
Most PCI devices can share an IRQ with another device, but they cannot use
an IRQ simultaneously. To avoid this type of conflict, see the documentation
for each PCI device for specific IRQ requirements. Table 4-2 lists the IRQ
assignments.
The CD drive activity indicator.
See "Troubleshooting an Optical Drive" on
page 143.
The hard-drive activity indicator.
See "Troubleshooting a Hard Drive" on page 146.
An unfamiliar constant scraping or
grinding sound when you access a
drive.
See "Getting Help" on page 167.
Table 4-2.
IRQ Assignment Defaults
IRQ Line
Assignment
IRQ0
System timer
IRQ1
Keyboard controller
IRQ2
Interrupt controller 1 to enable IRQ8 through IRQ15
IRQ3
Serial port 2 (COM2 and COM4)
IRQ4
Serial port 1 (COM1 and COM3)
IRQ5
Remote access controller
IRQ6
Diskette drive controller
IRQ7
Reserved
IRQ8
Real-time clock
Table 4-1.
Start-Up Routine Indications
(continued)
Look/listen for:
Action