EonStor DS S12/S16/S24 Series Hardware Manual
service via in-band protocols. The enclosure, along with other JBODs, connects to a
RAID system and serves as a building block of a scalable configuration.
In terms of supported protocols, the firmware supports communications with
enclosure devices, SAS/SATA disk drives and an EonStor DS RAID system featuring
6Gb/s SAS expansion ports.
In terms of physical connection, the SAS interface provides ease of cabling through
SFF-8088: Mini-SAS connectors with 4 PHYs wide links. Each SAS PHY physical
link is capable of 6.0Gbps data rate, respectively. Each expander controller provides
two SAS connectors with 4 PHYs each. With a backplane adapting SAS or SATA
drives, the system supports enterprise-class SAS or cost-effective SATA-II disk
drives, and is ideal for adding large capacity to a storage pool.
Power supply unit with built-in cooling module
S12 and S16 series
: Two cooling modules protect the subsystem from overheating,
and two hot-swappable power supply unit (PSU) modules provide constant power to
the subsystem. The modular nature of the subsystem and the easy accessibility to all
major components ensure ease of maintenance.
S24 series
: The S24 series PSUs have cooling modules built-in but they do not
serve as the main system cooling modules as is the case with S12 and S16 systems.
The S24 systems have standalone cooling modules situated on both sides of the
controller.
1.1.4
S12 vs S16 vs S24 Series Rear Panel
Dual Controller Models
The rear panels of S12, S16 and S24 series RAID / S12 and S16 JBOD systems
come with dual controller slots. Controller A is located on top and controller B at the
bottom for dual controller models. In dual controller configuration, if one controller
fails, the second controller module will take over in a manner that is transparent to
application servers.
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