ContentsAbout this Guide.......................................................................................................5Revision History..................................................................................................................................... 5Audience................................................................................................................................................ 5Contacting Dell......................................................................................................................................5Related Publications.............................................................................................................................. 51 About the SC100/SC120 Expansion Enclosure................................................7SC100/SC120 Expansion Enclosure Overview.....................................................................................7SC100/SC120 Expansion Enclosure Monitoring and Diagnostics.......................................................7SC100/SC120 Expansion Enclosure Front Panel Features and Indicators.......................................... 7SC100/SC120 Expansion Enclosure Back Panel Features and Indicators.......................................... 8SC100/SC120 Expansion Enclosure EMM Features and Indicators.................................................... 9SC100/SC120 Expansion Enclosure Drives........................................................................................ 102 Replacing SC100/SC120 Components........................................................... 11Safety Precautions............................................................................................................................... 11Installation Safety Precautions.......................................................................................................11Electrical Safety Precautions......................................................................................................... 12Electrostatic Discharge Precautions............................................................................................. 12General Safety Precautions........................................................................................................... 12Pre-Replacement Procedures.............................................................................................................13Sending Diagnostic Data Using Dell SupportAssist...................................................................... 13Shutting Down the Storage System and Expansion Enclosures..................................................13Replacing the Front Bezel................................................................................................................... 13Replacing Power Supply/Cooling Fan Modules.................................................................................14Identifying the Failed Power Supply..............................................................................................14Identifying the Failed Cooling Fan................................................................................................ 16Replacing a Power Supply/Cooling Fan Module.......................................................................... 17Replacing Hard Drives ........................................................................................................................ 19SC100/SC120 Expansion Enclosure Drive Numbering................................................................ 19Identifying the Failed Hard Drive.................................................................................................. 20Replacing a Hard Drive.................................................................................................................. 21Replacing an Enclosure Management Module.................................................................................. 23Identifying the Failed Enclosure Management Module............................................................... 23Replacing an Enclosure Management Module............................................................................ 24Replacing Rack Rails............................................................................................................................25Post-Replacement Procedures.......................................................................................................... 26Starting Up the Storage System and Expansion Enclosures........................................................26Sending Diagnostic Data Using Dell SupportAssist......................................................................263