Infortrend EonStor GS 3000 Series - Configuration Rules

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Configuration Rules
How to connect 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
Description
Designation
Description
1
RAID controller A
5
Dual-ported SAS drives
2
RAID controller B
6
Expander
3
JBOD controller A
7
To another JBOD
4
JBOD controller B
 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
offering high redundancy.