Configuration Rules - Infortrend EonStor DS 1024B Hardware Manual

Configuration Rules

Following are the rules for connecting SAS interfaces across RAID and JBOD
enclosures:
•
Fault-tolerant links in a dual-controller combinations: Corresponding to SAS
drives' dual-ported interface, two physical links are available from each disk
drive, routed across the backplane board, each through a SAS expander,
and then interfaced through a 4x wide external SAS port.
•
With data paths through separate SAS domains, access to disk drives can
be continued in the event of a cable link or SAS JBOD controller failure.
Designation
1
2
3
4
•
Fault-tolerant Links to SAS disk Drives
•
SAS expansion cables will be available with the JBODs. Note that if many
JBODs are connected, a longer SAS external cable (e.g., a 120cm cable)
may be necessary for connecting a JBOD from the opposite direction
Description Designation
RAID controller A
RAID controller B
JBOD controller A
JBOD controller B
81
Description
5 Dual-ported SAS drives
6 Expander
7 To another JBOD