![]() If the power failure lasts longer, the content of the cache is lost.īBUs must be serviced regularly. Depending on the capacity of the battery and the current charge level, the content of the cache can be retained for up to 72 hours. In addition, this solution is maintenance-free as there are no batteries that need to be replaced at regular intervals.Ĭache protection with Battery Backup Unit (BBU) uses a battery to hold the contents of the cache. The content of the cache remains in the flash memory, no matter how long the power failure lasts. Instead, in the event of a power failure, a capacitor briefly supplies enough power to write the contents of the volatile cache to a non-volatile flash memory. To preserve cache content in the event of a power failure, it can be protected with ZMCP or a battery backup unit.įurther information about the cache settings can be found in the article RAID Controller and Hard Disk Cache Settings.Ĭache protection using Adaptec Zero Maintenance Cache Protection (ZMCP) no battery is used. 3.*).Īdaptec RAID controllers provide an integrated cache to accelerate write access. The table shows an overview of the latest generations of Adaptec RAID controllers:įor a sample server configuration with Adaptec RAID Controller, please see Configurator - 2U Intel Single-CPU RI1208+ Server Scalable (Ver. Example of an Adaptec SmartRAID Controller: 3152-8i ![]()
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