Dell PowerEdge RAID Controller S140 User’s Guide
TRIM for SATA SSDs
The TRIM command allows an operating system to delete a block of data that is no longer considered in use from the SATA SSDs. TRIM resolves the Write Amplification issue for supported operating systems. 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 that the Logical Block Addressing (LBA) file 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.
NOTE: The TRIM feature is supported
only on pass-through SSDs.
NOTE: The TRIM feature is not supported
on NVMe PCIe SSDs.
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