CacheVault Flash Cache
This article describes the function of the LSI CacheVault Technology. It is a similar technology to Adaptec Zero Maintenance Cache Protection (ZMCP).
How it works
No battery is used with CacheVault technology. The cache content is protected by the following systems:
- A double-layer capacitor is connected to the RAID controller.
- This will be fully loaded automatically during server startup.
- In case of power failure the RAID controller uses the power of the capacitor to write the Flash-Memory to maintain all contents of the cache non-volatile (almost like a USB stick).
- The next time the server is started the RAID controller writes the data from the Flash-Memory to the RAID Array.
Some advantages compared to a BBU:
- A traditional BBU loses cached data after 72 hours without restored power. CacheVault technology stores the contents of DRAM on NAND flash for up to three years.
- No BBU/battery replacement necessary
- 3 years of guaranty instead of 1 year for BBUs
Controller with CacheVault
- MegaRAID SAS 9260CV-4i
- MegaRAID SAS 9260CV-8i
- MegaRAID SAS 9285CV-8e
- MegaRAID SAS 9286CV-8e
- MegaRAID SAS 9286CV-8ECC
Controller with optional CacheVault Module
The following controllers are available as options CacheVault Module LSICVM01 (LSI00297).
- MegaRAID SAS 9266-4i
- MegaRAID SAS 9266-8i
- MegaRAID SAS 9271-4i
- MegaRAID SAS 9271-8i
- MegaRAID SAS 9271-8iCC
Video Showing CacheVault
- CacheVault™ Flash Cache Protection (lsi.com)