Dell EMC Boot Optimized Server Storage-S1 User's Guide

TRIM (Non-RAID physical disk) allows an operating system to delete a block of data that is no longer considered in use by SSDs. For supported operating systems, the TRIM command resolves the write amplification issue. When an operating system deletes a file, the file is marked for deletion in the file system, but the contents on the disk are not actually erased. As a result, the SSDs do not know the Logical Block Addressing (LBA) previously occupied can be erased. With the introduction of TRIM, when a file is deleted, the operating system sends a TRIM command along with the LBAs that do not contain valid data to the physical disk.