User Guide
1. Overview
1.12 Host Connectivity
Note: MegaRAID adapters do not support the use of active SAS cables. If your configuration
requires the use of MegaRAID adapters, passive cables must be used.
Table 20: Approved SAS Cables
Type Length
Part
Number
Vendor Part Number
Active HD Mini-SAS to HD Mini-SAS Variable N/A Molex: 106415-21xx
*
Amphenol:
601760006
601760006-02
CS Electronics: 12G-HD-4444/2M
DSC: C5555-2M
FCI: 10117949-2020LF
Molex: 1110751002
Passive HD Mini-SAS to HD Mini-SAS 2m 1EX1531
TMC: C5555-2M
Amphenol: 601760008
CS Electronics: 12G-HD-4444-3M
FCI: 10117949-3030LF
Passive HD Mini-SAS to HD Mini-SAS 3m N/A
Molex: 1110751003
Passive HD Mini-SAS to HD Mini-SAS
1m,
2m, 3m
N/A
FCI:
10112041-2010LF (1m)
10112041-2020LF (2m)
10112041-2030LF (3m)
Active Cables
During the process of Daisy Chaining the Ultrastar Data102 enclosures, active cables must be used when
connecting between enclosures. The use of active cables provides improved signal integrity between the
enclosures.
Passive Cabling
If you are connecting more than one host port per I/O, you must connect cables to every other port per
IOM and do not need all six ports, Western Digital recommends connecting the cables to every other port
as a best practice. The recommended connection order on IOM A ports A6, A4, and A2 for subsystems
with three or fewer connected hosts. If more than three hosts are required, the recommended connection
order on IOM A ports A5, A3, and A1 to be connected next. The recommended connection order on IOM
B ports B1, B3, and B5 for subsystems with three or fewer connected hosts. If more than three hosts are
required, the recommended connection order on IOM A ports B2, B4, and B6 to be connected next.
* Active Cables can be used for both direct and daisy-chain connections. xx represents the length of the cable and can be
replaced by length of cable in meters; preceding numbers are the qualified cable family.
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