TRIM

2 articles

Tech 16 Sep 2026 5 min read

SSD TRIM Marks Unused Data for Controller Reclamation

Deleting a file changes filesystem metadata, but an SSD does not automatically know that every flash page formerly associated with the file can be treated as disposable. From the drive’s point of view, previously written logical block addresses can remain valid until the host explicitly indicates otherwise or overwrites them. TRIM provides that indication for ATA storage. Comparable deallocation commands exist in other storage protocols. The host identifies logical block ranges whose previous contents no longer need to be preserved, and the SSD can use that information when managing flash internally.

Storage SSD

Tech 15 Sep 2026 6 min read

SSD TRIM Marks Discarded Data for Flash Reuse

Deleting a file changes filesystem metadata, but that action does not automatically tell a solid-state drive which flash pages no longer contain useful data. From the drive’s point of view, previously written logical block addresses can remain valid until the host explicitly replaces them or marks them as discarded. TRIM closes that information gap. The operating system can notify the storage device that selected logical blocks no longer need their old contents. The SSD may then treat the associated data as disposable during its internal space-management work.

Storage SSD