Stop Letting SSD Performance Rot: Practical fstrim.timer on Linux If your Linux system lives on SSDs, virtual disks backed by SSD storage, or thin-provisioned volumes, TRIM is one of those boring maintenance jobs that is easy to forget and annoying to debug later. The good news is that modern Linux already has a sensible answer: fstrim.timer . This post shows how to: verify that discard is actually supported check whether fstrim.timer is already enabled enable a weekly TRIM schedule safely run a manual trim when you need one avoid a common mistake, mounting everything with continuous discard I am focusing on the practical path here, not storage folklore. What TRIM actually does When files are deleted, the filesystem knows those blocks are free, but the SSD may not know that immediately. TRIM, exposed on Linux through fstrim , tells the underlying storage which unused blocks can be discarded.…