EonStor / EonStor DS S12/S16/S24 Series
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Cache Backup Module (CBM) for RAID Models
The Cache Backup Module (CBM), located inside the controller, consists of a battery
backup unit (BBU)
(1)
and flash backup module (FBM)
(2)
. The CBM can sustain
cache memory after a power failure. 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
X
CBM Installation
X
.
1
2
Type I
Type II
For type II dual controller systems, the Cache Backup Module is a standard feature
pre-installed into the controller and an optional accessory for single controller models.
The Battery Backup Unit (BBU) can be serviced by the user but the Flash Backup
Module (FBM) is not serviceable by the user.
NOTE
The BBU is only charged partially when shipped. Therefore, after powering on the
system the BBU will start charging to its full capacity. It normally requires
approximately twelve hours for the battery to be fully charged. If the battery is not
fully charged after twelve hours, 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 module via SANWatch or the firmware (please refer to respective manuals).
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