Continuous TRIM is not the most preferred way to issue TRIM commands among the Linux community. Note: If you want to use TRIM, use either periodic TRIM or continuous TRIM.

Without the NVMe DEALLOCATE, SAS UNMAP or ATA_TRIM command (supported by most SSDs), the disk controller takes more time to do a write operation as soon as there is no empty memory blocks, as it has to shuffle data around to erase a cell before writing to it (see Wikipedia:Write amplification): a TechSpot benchmark shows the performance impact before and after filling an SSD with data. Since the flash cells they are made of are worn out a little with each write operation, the disk controllers use algorithms to share the write operations on all the cells: this process is called wear leveling.

If you want to partition an SSD for a specific purpose, it may be useful to consider the List of file systems optimized for flash memory.įor general usage, simply choose your preferred filesystem and enable #TRIM.Ĭompared to hard drives, where deleting a file is only handled at the file system level, SSDs benefit from informing the disk controller when blocks of memory are free to be reused. This article covers special topics for operating solid state drives (SSDs) and other flash-memory based storage devices.

Kingston ssd partition tool