EonStor DS S48 Series Hardware Manual
The use of a CBM is highly recommended in order to safeguard data integrity. If you
are using the single controller models and would like to install a CBM, refer to
Installing Cache Backup Module (CBM) for RAID Models
.
The CBM (BBU and FBM) can be default or optional item depending on the model:
S48F Series
Model name
Speed
Controller
BBU
FBM
S48F-G2842-6 8Gbps Single
Optional
Optional
S48F-R2842-6 8Gbps
Dual Default
Default
The BBU is only partially charged when shipped. Therefore, after powering on the
system, the BBU will start charging till it has reached its full capacity. It requires
approximately twelve hours for the battery to be fully charged. If the battery is not
fully charged after twelve hours (refer to CBM status LED in the
), there may be a problem with the BBU and you should contact your
system vendor immediately. You can also check the status of the battery backup
module via SANWatch or the firmware (refer to the SANWatch or Firmware manual
for more details).
1.2.2
JBOD Controller and Interface
The JBOD expander controllers distribute data flow to individual disk drives and
report operating statuses through a proprietary enclosure service via in-band
protocols. JBODs can be daisy chained and they connect to a RAID system to serve
as a building block of a scalable configuration.
The two SFF-8088 Mini-SAS interfaces come with 4 PHYs wide links each. Each
SAS PHY physical link is capable of 3.0Gbps or 6.0Gbps data rate. With a backplane
adapting SAS or SATA drives, the system supports enterprise-class SAS,
cost-effective SATA-II or SATA-III disk drives, and is ideal for adding large capacity to
a storage pool.
The general rule for connection between RAID and JBOD systems:
Dual controller RAID systems connect to dual controller JBOD systems.
Single controller RAID systems connect to single controller JBOD systems.
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