Dell E521 specifications Drives, Connecting Drive Cables

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1	sliding plate lever	2	sliding plate	3	drive panel

4	drive panel tabs (3)	5	side hinges

2.Align the drive panel tabs with the side hinges.

3.Rotate the drive panel toward the computer until it snaps into place on the front panel.

Drives

The computer supports a combination of these devices:

•Up to two serial ATA hard drives

•One optional floppy drive or an optional Media Card Reader

•Up to two CD or DVD drives

1	CD/DVD	2	FlexBay for optional floppy drive or optional Media Card	3	hard
	drive		Reader		drive

Connect serial ATA hard drives to connectors labeled "SATA0" or "SATA1" on the system board.

Connect serial ATA CD or DVD drives to connectors labeled "SATA2" or "SATA3" on the system board. See System Board Components.

Connecting Drive Cables

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Contents Model Dcsm About Your Computer Front View of the ComputerBack Panel Connectors Back View of the ComputerBack to Contents Diagnostic Lights Advanced TroubleshootingPower Lights Light Pattern Problem Description Suggested ResolutionCode Cause Beep CodesSystem Messages Click the Change or Remove Program icon Diskette read failureDell Diagnostics Starting the Dell DiagnosticsDrivers Dell Diagnostics Main MenuWhat Is a Driver? Identifying DriversManually Reinstalling Drivers Reinstalling DriversUsing Windows XP Device Driver Rollback Windows XPResolving Software and Hardware Incompatibilities Click Start, then click Help and SupportRecommended Tools Before You BeginGetting Started Turning Off Your ComputerBack to Contents Removing and Installing Parts Removing the Computer CoverMemory Installation Guidelines MemoryAddressing Memory With 4-GB Configurations Installing MemoryCards Removing MemoryInstalling a PCI Card PCI CardsPage Removing a PCI Card Installing a PCI Express Card PCI Express CardsPage Removing a PCI Express Card Drive Panel Removing the Drive PanelRemoving the Drive-Panel Insert Installing the Drive-Panel InsertInstalling the Drive Panel Connecting Drive Cables DrivesHard Drive Drive Interface ConnectorsConnecting and Disconnecting Drive Cables Installing a Hard Drive Removing a Hard DrivePage Floppy Drive Adding a Second Hard DriveRemoving a Floppy Drive Installing a Floppy Drive Media Card Reader Removing a Media Card ReaderInstalling a Media Card Reader CD/DVD Drive Removing a CD/DVD DriveInstalling a CD/DVD Drive Page Replacing the Battery BatteryPower Supply Replacing the Power Supply Processor Removing the ProcessorInstalling the Processor Page Panel Removing the I/O PanelRemoving the Processor Fan Installing the I/O PanelProcessor Fan Installing the Processor Fan System Board Screws System BoardRemoving the System Board Installing the Computer Cover Installing the System BoardBack to Contents September 2006 Rev. A00 Specifications Controls and Lights ConnectorsDrives Environmental PowerPhysical System Setup Screen System SetupEntering System Setup OverviewSystem Setup Options Onboard DevicesUnlocked Bypass isNot Set Changing Boot Sequence for the Current Boot Boot SequenceOption Settings Setup & Boot MenuClearing Forgotten Passwords Changing Boot Sequence for Future BootsClearing Cmos Settings Flashing the BiosClick Save this program to disk, and then click OK System Board Components Technical OverviewInside View of Your Computer Power Supply DC Connector Pin Assignments Pin Number Signal name AWG WireDC Power Connector P2 DC Power Connector P10