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E-5
Appendix E: SC417J Chassis Internals and Externals
SC417J Chassis External Connectivity
It is important to understand that this is a JBOD chassis. A JBOD chassis has no
motherboard, but uses an initiating head unit or a host/server unit. A JBOD chas-
sis has an HBA or RAID card to host, and maps the drives in the JBOD chassis
downstream. The head unit’s RAID card cascades to this chassis using an external
single-end to single-end cable, such as CBL-0166 which is illustrated below.
SMCI confidential document 6 Whitepaper
Below please see block diagram of how the connections are made, internally:
Section 3
– 847 JBOD chassis external connectivity
First it’s important to know that this is a JBOD chassis. This means that there is no
motherboard used in this chassis. It also means that we would need an initiating
head unit
or a host/server unit which would have a HBA or RAID card to host and map the drives
in the downstream JBOD chassis. The head unit’s RAID card would cascade to this
chassis using an external SFF 8088 to SFF 8088 cable (i.e. CBL-0166). See picture of
cable below:
Picture of 846 & 847connected to the side
of the chassis
Figure 6
BPN-SAS2-847-EL1
SFF 8087 X 4 to SFF
8088 X 4 cable board
SC847E16 JBOD SFF 8088 by four
J0
J1
J0 J1 J2
BPN-SAS2-846EL1
BPN-SAS2-
847EL1
Figure E-7: CBL-0166