Western Digital Ultrastar ScaleUp SE4U102 User Manual page 39

User Guide
Length
3m
As a best practice, Western Digital requires connecting the cables to every other SAS connector port when
connecting more than one host per IOM. Please refer to
Order (page 23) for port connection ordering required for IOMA and IOMB:
Table 24: Recommended IOM Port Connection Order
IOM
A
B
Edge Buffering
Edge buffering is an enclosure feature that increases the overall performance when a 6Gb/s target is
connected. With edge buffering disabled, primitives that can be deleted from the initiator are added to
slow the effective logical rate to the slowest target device connected between the initiator and the target
device. With edge buffering enabled, the expanders buffer data from slower 6Gb/s targets to utilize the
12Gb/s link from the expander to the initiator in a more efficient manner.
Manufacturer
Molex
The Mate Company (TMC)
Amphenol ICC (FCI)
CS Electronics
Molex
2nd Host
1st Host Ports
Ports
A6 A4
B1 B3
Table 24: Recommended IOM Port Connection
3rd Host 4th Host
Ports Ports
A2 A5
B5 B2
1. Overview
1.16 SAS Cabling
Vendor Part Number
1110751002
C5555-2M
601760008
10117949-4030LF
12G-HD-4444/3M
1110751003
5th Host 6th Host
Ports Ports
A3 A1
B4 B6
23