Unlike DCA V1 which needs to go through a 12-hour learning cycle to have RAID battery recharged every 90 days, DCA V2 RAID battery recharging is quick and normally doesn’t impact disk performance.
But if the RAID battery is faulted, the disk performance will be impacted.
DCA V2 RAID can become write-through mode:
# CmdTool2 -LDGetProp -Cache -lall -a1 Adapter 1-VD 0(target id: 0): Cache Policy:WriteThrough, ReadAhead, Direct, No Write Cache if bad BBU Adapter 1-VD 1(target id: 1): Cache Policy:WriteThrough, ReadAhead, Direct, No Write Cache if bad BBU Adapter 1-VD 2(target id: 2): Cache Policy:WriteThrough, ReadAhead, Direct, No Write Cache if bad BBU
To verify if the battery is faulted, you can use the following two commands:
# CmdTool2 -adpbbucmd -getbbustatus -aALL BBU status for Adapter: 1 BatteryType: CVPM02 Voltage: 9399 mV Current: 0 mA Temperature: 34 C BBU Firmware Status: Charging Status : None Voltage : OK Temperature : OK Learn Cycle Requested : Yes Learn Cycle Active : No Learn Cycle Status : OK Learn Cycle Timeout : No I2c Errors Detected : No Battery Pack Missing : No Battery Replacement required : Yes <================= Remaining Capacity Low : No Periodic Learn Required : No Transparent Learn : No No space to cache offload : No Pack is about to fail & should be replaced : No Cache Offload premium feature required : No Module microcode update required : No
# CmdTool2 -AdpBbuCmd -BbuLearn -aALL Adapter 0: BBU Learn Succeeded. Adapter 1: BBU Learn Failed
Battery is not FRU in DCA V2, replace the system if the battery is faulted.