Dell EMC ME4084 - Default Chapter; Table of Contents

1 Storage system hardware..............................................................................................................5
Locate the service tag.......................................................................................................................................................... 5
Enclosure configurations...................................................................................................................................................... 5
Upgrading to dual-controller configuration.................................................................................................................. 6
Enclosure management........................................................................................................................................................ 6
Operation................................................................................................................................................................................ 6
Attach or remove the 2U enclosure front bezel..........................................................................................................8
Enclosure variants................................................................................................................................................................. 9
2U enclosure core product................................................................................................................................................. 10
2U enclosure front panel............................................................................................................................................... 10
2U enclosure rear panel..................................................................................................................................................11
5U84 enclosure core product.............................................................................................................................................14
5U84 enclosure front panel...........................................................................................................................................14
5U84 enclosure rear panel............................................................................................................................................ 15
5U84 enclosure chassis.......................................................................................................................................................18
5U84 enclosure drawers................................................................................................................................................18
Operator's (Ops) panel LEDs............................................................................................................................................. 19
2U enclosure Ops panel.................................................................................................................................................19
5U enclosure Ops panel................................................................................................................................................20
Controller modules......................................................................................................................................................... 21
CompactFlash...................................................................................................................................................................... 26
Supercapacitor pack......................................................................................................................................................27
Controller failure when a single-controller is operational................................................................................................27
Transporting cache........................................................................................................................................................27
2 Troubleshooting and problem solving........................................................................................... 28
Overview.............................................................................................................................................................................. 28
Fault isolation methodology................................................................................................................................................28
Fault isolation methodology basic steps..................................................................................................................... 28
Options available for performing basic steps............................................................................................................. 28
Performing basic steps................................................................................................................................................. 29
LEDs......................................................................................................................................................................................30
2U enclosure LEDs......................................................................................................................................................... 31
5U84 enclosure LEDs....................................................................................................................................................33
Troubleshooting 2U enclosures......................................................................................................................................... 35
PCM faults......................................................................................................................................................................36
Thermal monitoring and control...................................................................................................................................36
Thermal alarm.................................................................................................................................................................37
Troubleshooting 5U enclosures......................................................................................................................................... 37
Thermal considerations.................................................................................................................................................38
CLI port connections.....................................................................................................................................................38
Temperature sensors.......................................................................................................................................................... 38
Host I/O................................................................................................................................................................................38
Contents
Contents 3