Swissbit powersafe: Guaranteed maximum data protection against power outages
Effective protection against loss of data in the event of sudden power outages (Power Loss Protection - PLP) is an essential and established safety feature of industrial SSDs. All Swissbit storage solutions are therefore equipped with optimized PLP technology as standard to safeguard against the loss of user data and ensure device and firmware integrity.
For maximum protection, especially in mission-critical applications, Swissbit has now introduced "powersafe", an additional PLP level that also secures data as it transfers from host to controller (Dynamic Data) or from DRAM to NAND (Cached Data). The new feature provides industry leading PLP protection for SSDs that are designed for highest reliability and long product lifecycles.
The secret to the high performance of the "powersafe" feature is the combination of sophisticated firmware and hardware features. Highly reliable tantalum capacitors that store energy while the SSD is in operation form the basis. In the event of a sudden power outage, the stored charge is used to safely write both dynamic data and data in the DRAM cache to the NAND flash array. Intelligent power management within the firmware ensures that the power supply disconnects from the host upon reaching a critical threshold and connects to the regulated voltage of the capacitors instead. This provides the SSD with sufficient power to safely execute write commands and flush cached data.
The operating principle of Swissbit powersafe
- During a sudden power outage, the input voltage Vin begins to drop
- as soon as Vssd reaches a critical voltage threshold, the power management disconnects Vssd from the host and connects to the regulated voltage of Vcap (capacitors, in blue)
- powersafe supplies the SSD with power (tpowersafe) long enough to execute write commands and empty cached data.