: Historically, HPE offered a 60-day free trial key to evaluate the technology without data loss risks. Controller Compatibility
The controller must be populated with an operational FBWC module (typically 1GB, 2GB, or 4GB). SmartCache will not activate or will operate in a degraded state without a healthy supercapacitor module. hp smartcache license key top
Data is initially written directly to the high-speed SSD cache and later flushed to the backend HDDs. This accelerates both read and write operations but requires a battery-backed write cache (FBWC/BBWC) to prevent data loss during power failures. The Role of the HP SmartCache License Key : Historically, HPE offered a 60-day free trial
: As these server generations are older, official license keys are increasingly difficult to source directly from HPE. SKUs for Reference : D7S26A : Physical License (Single Server). D7S27A : Physical License (Multi-Pack). D7S27AAE : Electronic License (Single/Multi-Pack). Data is initially written directly to the high-speed
Depending on your array generation, SmartCache supports two distinct operational modes: SSD Caching w/SmartCache - Spiceworks Community
: Activating the license enables the firmware within Smart Array P-series controllers to use SSDs as a low-latency cache for traditional hard drive arrays. License Types Single-Server License (LTU) : A unique key for one physical server. Flexible-Quantity License (E-LTU)
SmartCache is specifically supported on the following RAID controllers: : P420i, P420, P421, P822, and P721m. Gen9 Servers : P440ar and similar P-series controllers.