Jbod Connections; Jbod Sas Expansion Configuration - Infortrend EonStor GS 3000 Series Hardware Manual

JBOD Connections

A SAS host link cable is included per JBOD. If you need to purchase other cables or
if you need other cable(s) of different length, please contact your vendor.
WARNING
All SAS cables are sensitive and must be handled with care. To prevent interference
within a rack system, the cable routing path must be carefully planned and the cables
must not be bent.
Please contact your vendor for a list of compatible components!

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 that is manually
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.
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