Dell PowerVault DP600 - Manual (Page 146)

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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 147.
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 USB diskette drive activity
indicator. See "Troubleshooting a USB Device" on
page 151.
The USB CD drive activity indicator. See "Troubleshooting a USB Device" on
page 151.
The diskette drive activity indicator. See "Troubleshooting a Diskette Drive" on
page 160.
The CD drive activity indicator. See "Troubleshooting an Optical Drive" on
page 162.
The hard-drive activity indicator. See "Troubleshooting a Hard Drive" on
page 164.
An unfamiliar constant scraping or
grinding sound when you access a drive. See "Getting Help" on page 185.
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)
Table 4-1. Start-Up Routine Indications (continued)
Look/listen for: Action
book.book Page 146 Monday, September 14, 2009 1:53 PM