Datoptic RM12-S6.TB - Rackmount Bedienungsanleitung PDF herunterladen (Seite 82)

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APPENDIX

most servers from power uctuations or failures, a BBM provides

an additional level of protection. In the event of a power failure,

a BBM supplies power to retain data in the RAID controller’s

cache, thereby permitting any potentially dirty data in the cache

to be ushed out to secondary storage when power is restored.

The batteries in the BBM are recharged continuously through

a trickle-charging process whenever the system power is on.

The batteries protect data in a failed server for up to three or

four days, depending on the size of the memory module. Under

normal operating conditions, the batteries last for three years

before replacement is necessary.

• Recovery ROM

RAID controller rmware is stored on the ash ROM and is ex-

ecuted by the I/O processor. The rmware can also be updated

through the RAID controllers PCIe 2.0 bus port or Ethernet port

without the need to replace any hardware chips. During the

controller rmware upgrade ash process, it is possible for a

problem to occur resulting in corruption of the controller rm-

ware. With our Redundant Flash Image feature, the controller

will revert back to the last known version of rmware and con-

tinue operating. This reduces the risk of system failure due to

rmware crash.

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Datoptic RM12-S6.TB - Rackmount Bedienungsanleitung Seite 82