TRIM / discard on Linux
Verification
lsblk --discardshould show non-zero columnsDISC_GRANandDISC-MAX[(Superuser.com: Is setting 'discard' on a partition exposed through LVM sufficient?)]hdparm -I /dev/sdx | grep "TRIM"will tell you if trim is supported on your SSD.[(Unix Stackexchange: When and where to use rw,nofail,noatime,discard,defaults?)]