How to extend the term of solid State drive

In previous projects, we understood the wear and loss balance of flash memory, and manufacturers were looking for the cause of the loss around the way they worked. The technology used by the supplier to solve the wear problem aims to make the solid-state hard disk based on flash more predictable, although the implementation is still long, but predictability is the key to the firm's reliance on solid state storage. There is another key factor that affects the storage life of solid-state hard disks-how to use them.

The lifetime of solid-state storage is affected by the frequency at which data is written. Frequent data writes to the Flash area will speed up the flash memory failure. It is important to realize that the loss balance can only guarantee the synchronous wear of the flash microcomputer, and nothing can make the flash microcomputer accept a longer write cycle than before. As we discussed, "Flash SSD is now reliable", there are basically three types of flash Memory: Single-layer units (SLC), multi-tier units (MLC), and Enterprise-class MLC (EMLC). The main difference between these three types of flash memory is how many write cycles can be processed, MLC rated 5,000, EMLC about 30,000 and SLC 100,000. Because there are no full-time personnel to track their storage systems, most vendors have extended this value for years.

The biggest worry about flash life or endurance is that the data is constantly being written to the device. The best example of this is caching and automatic layering techniques. Data is stored at the basic mechanical disk drive level and continuously analyzed, and when the data becomes active, it is upgraded to a solid state layer or cache. From the refresh rate, this may mean that solid-state storage can be refreshed more than once a day. In an environment where data transfers are very high, the wear of solid-state storage may be faster than you might think.

How does automatic tiering and caching improve data access efficiency? Increase data activity and stay active (from a read-only perspective) and you can actually feel the memory's storage performance. For example, only one file that is accessed once is not sufficient to facilitate data speed. This is one of the advantages of solid-state hard disk static layering that will exceed automatic layering. You can lock in the data that you want to stay on this layer without worrying about the data being moved back and forth at work. In the future, we'll focus on how these technologies challenge fast tiering in automated tiering and caching systems.

There is a way to give suppliers more solid storage life, at least as it seems. The supplier increases the solid storage life expectancy, and the storage system provides more memory units to the solid-state storage. Usually about 25% to 30% of the additional capacity is allocated to solid state storage. He will provide more units for data writing. Helps the garbage collection process, with unit losses, and helps drives continue to provide storage capacity. In addition, the only thing a vendor can do to increase flash life is to find ways to reduce the data that is actually written to the drive. This requires the use of RAM-based cache write techniques, such as compression and duplicate data deletion. Another technique uses only solid-state storage, which reduces the movement back and forth between storage tiers.