Sas Expansion Links; Jbod Sas Expansion Configuration - Infortrend EonStor DS 1024B Hardware Manual

SAS Expansion Links

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 different 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 enclosure fails in between.
There is a rotary ID switch on every
expansion enclosure
configured using a flat blade screwdriver.
Configuring enclosure IDs:
•
The configurable IDs for JBODs are
from 1 to 15. Usually the numbering
starts from the one closest to the
managing RAID enclosure.
•
Make sure a unique ID is configured on each JBOD so that the SAS WWN
addresses of disk drives can be properly assigned. RAID system firmware
automatically manages these addresses.
that is manually
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