Advantech ASR-5300I Series, User Manual

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55 ASR-5300I Series Hardware User Manual
Chapter 3
S
ystem
Connection
3.7 JBOD Connections
One SAS host link cable per JBOD is provided. To purchase additional cables or
cable(s) of different length, please contact your vendor.
The cable features include 28AWG x 8 pair, 100ohm, black, UL-approved, lead-free,
50 cm, 120 cm, or 170 cm cable lengths, and connectors that can be secured to the
chassis using thumb screws or a latching mechanism.
Please contact your vendor for a list of compatible components.
3.7.1 SAS Expansion Links
3.7.2 JBOD SAS Expansion Configuration
The SAS expansion port connects to expansion JBOD enclosures. For dual-controller
systems, each expansion port connects a RAID controller to a corresponding JBOD
controller making fault-tolerant links to various SAS domains.
The following principles apply to RAID and JBOD connections:
 Dual-controller RAID connects to dual-controller JBODs.
 Single-controller RAID connects to single-controller JBODs.
 A longer cable is available for making expansion links with a dual-controller
configuration. A longer cable is required if connections to JBODs are made from
two opposite directions. Routing through two different connections can avoid
loss of data links if one in-between enclosure fails.
The rotary ID switch on every expansion enclosure can be manually configured using
a flat blade screwdriver.
Warning! All SAS cables are sensitive and must be handled with care. To prevent
interference within a rack system, the cable routing path must be
carefully planned and the cables not bent.