support.dell.com Dell PowerVault NAS Appliances Boot Hard-Disk Replacement 1-1Dellô PowerVaultô 735N NASAppliances Boot Hard-Disk DriveReplacementThis document describes how to remove a faulty hard-disk drive containing the oper-ating system from your Dell PowerVault network attached storage (NAS) appliance.See your system Installation and Troubleshooting document for detailed informationon troubleshooting your system.NOTE: If the Microsoft ® Windows ® Powered operating system becomes inoperable,you can use the Dell PowerVault 735N Systems Reinstallation CD to reinstall theoperating system. If you can successfully restore the operating system on the boothard-disk drive and the drive passes all the Dell Diagnostics, it is not necessary toreplace the boot hard-disk drive at this time.Install this customer kit only when your boot hard-disk drive (SCSI ID 0, located in thetop left slot in your system) fails to successfully install the operating system.Kit ContentsThis customer kit consists of a hard-disk drive and this document. You will also need a#2 Phillips screwdriver (to remove the faulty hard-disk drive from its drive carrier andto install the new replacement hard-disk drive). You should be familiar with the con-tents of your System Administrator’s Guide and your Service Manual.Hard-Disk Drive RemovalEach hard-disk drive installed in the system is mounted in a hard-disk drive carrier.The front bezel must be removed from the system front panel, and the square metallocking pin must be lifted out before you remove a drive carrier.To remove a hard-disk drive and its drive carrier, perform the following steps.NOTICE: See the safety instructions in your System Information documentfor information on protecting the system from electrostatic discharge.1. Shut down the system and disconnect the power cables.2. If the optional bezel is installed, remove it.