DS4243 Disk Shelves

• DS4243 FRUs, connectors, controllers & switches
• Configuration and tasks related to DS4243
  
• Field Replaceable Units (FRUs) related to the DS4243
  
• The DS4243 is a FRU in an of itself comprised of multiple other FRUs:
  
• Chassis
• 4U weighing 110lbs
  
• PSUs
• two required for SATA drive shelves
• two empty slots must contain blank PSUs to provide air flow
• four required for SAS drive shelves
• Labeled 1-4 from left to right, top to bottom
  
• IOM3
• input-output modules
• provide multi-path high availability
• each IOM3 contains two ACP ports and two SAS ports
  
• Ear Covers
• left and right ear covers; left is for the digital readout of the shelf ID as well as the shelf LEDs.  The shelf-ids are under the right ear cover.
• hidden by left ear cover is shelf ID switch, must power cycle shelf to have new shelf ID take effect
  
• HDDs
• supports 24 disk drives, labeled 0-24 from top left to bottom right\
• SAS or SATA but not mixed, however different shelves in same stack can be mixed, use blank panels for empty slots to ensure proper air flow
  
• SAS HBAs (controller)
• quad-port PCIe
• in 3000+ series FAS/V models
• dual-port PCIe mini
• only supported in FAAS2050 controller
  
• QSFP Copper Cables
• used to connect SAS HBAs to controller or other disk shelves IOM3 SAS PCIe controller
  
• Ethernet (ACP) Cables
• extra shielding for increased EMI performance
• from IOM3 to IOM3 or IOM3 to controller
  
• Cable connectors
• QSFP & 10/100
• Quad-small-form factor pluggable connectors are keyed, and should be gently inserted into IOM3 SAS ports.
• 10/100 connect 10Mbps/100Mbps provide ACP Ethernet network
• two 10/100 and two QSFP on each IOM3
• QSFP is 4-wide meaning 4 lanes per port times 3Gbps for max of 12Gbps
  
• LEDs
• 51 per chassis
• 3 shelf LEDs and 48 disk drive LEDs
• Disk LEDs:  Power (top) Fault (bottom)
• shelf LEDs: Power (top), Fault (middle), Activity (bottom)
  
• PSU LEDs
• each PSU has 4 LEDs:
• AC Fail, PCM OK, Fan Fail, DC Fail
  
• IOM3 LEDs
• each IOM3 has 7 LEDs: IOM fault, Ethernet Activity & Ethernet Up/Down, then SAS activity