NEC A1160 - Manual (Page 27)

I/O Subsystem
2-9
Each slot has its own power and attention indicators (LEDs).
y Internal slot for PCIe Serial Attached SCSI (SAS) RAID controller
Figure 2-6 shows the I/O riser board.
Figure 2-6 I/O Riser Board
PCIe Card Carrier
The PCIe card carrier enables an administrator or technician to insert or remove the
PCIe cards from the rear of the cell. Typically, a PCIe card plugs into a motherboard
vertically. Vertical insertion requires access to the cards from the top of the cell. In a rack
environment, this access requires rails in order to pull the cell forward, longer cables,
and additional cable management.
The PCIe carrier turns the PCIe card connection 90 degrees. This configuration enables
the administrator or technician to insert and remove the carrier while holding it
horizontally. The technician or administrator places the PCIe card in the PCIe carrier
and plugs the card and carrier into a connector on the I/O riser board from the rear of a
cell. This configuration eliminates the need to access the cell from the top.