Cache flushing time supported by a single BBU of OceanStor V3 after the system is powered off


The BBU can provide power for eight minutes. OceanStor V3 BBUs are in 1+1 backup mode. The cache has enough time to flush dirty data to data coffer disks.

Other related questions:
Power-off of the OceanStor V3 series
Power-off sequence of the OceanStor V3 series: Stop host services �?Power off the controller enclosure by holding down the Power button for 5 seconds or on OceanStor DeviceManager �?Disconnect the controller enclosure and disk enclosure from external power supplies

Cache power-off protection solution of RAID controller card
Intelligent battery backup units (iBBUs) or supercapacitors (recommended) can be used to improve cache data security of servers. ? iBBU: If a server is powered off unexpectedly, data will be stored in the DDR. The iBBU provides power to the DDR to ensure normal operation. The data protection time is generally 48 to 72 hours. The iBBUs require charging and discharging. This may affect the server performance for 4 to 9 hours. An iBBU needs to be replaced every one to two years. ? Supercapacitor: When a power failure occurs, the supercapacitor provides power to the RAID controller card, DDR, and trans flash module (TFM), ensuring data is migrated from the DDR to the TFM. After the data is migrated to the TFM, the supercapacitor no longer needs to provide power to the cache. It takes little time to charge and discharge a supercapacitor, with no impact on system performance. A supercapacitor will last as long as the server.

Whether the SmartCache feature of the OceanStor V3 Series supports read and write cache
The SmartCache feature only supports read cache.

Is it normal that a "BBU has insufficient power" alarm is displayed on the ISM after a storage system is powered on or running for a while?
Yes. The condition triggering this alarm is that the BBU is being charged. After the BBU is fully charged, this alarm is cleared automatically. If this alarm persists after a long period of time, replace the BBU with a new one and wait until the charging completes. If the alarm still persists, contact technical support engineers.

Whether I can configure the storage system after the S2600 storage system is powered on and the BBU is being charged
The S2600 storage system can be configured under any circumstance.

If you have more questions, you can seek help from following ways:
To iKnow To Live Chat
Scroll to top