Am Sat, 11 Nov 2017 14:13:12 +0100 schrieb Christian Seiler: > Also, did you mount the device with -o discard or set that option with > tune2fs (_before_ mounting it)?
No, not now. I want to use fstrim in favour to the discard option. But I've tested it with an Arch Linux installation with a more fresh kernel. There both vairante (fstrim and discard-option in fstab) fails too. In case of the discard option, the error is written to the logs. > What does the command > findmnt | grep /media/jd/TEST $ findmnt | grep /media/jd/TEST ├─/media/jd/TEST /dev/sdg1 ext4 rw,nosuid,nodev,relatime,data=ordered $ sudo lsblk -D [sudo] password for jd: NAME DISC-ALN DISC-GRAN DISC-MAX DISC-ZERO sda 0 512B 2G 0 ├─sda1 0 512B 2G 0 └─sda2 0 512B 2G 0 sdb 0 0B 0B 0 sdg 0 0B 0B 0 └─sdg1 0 0B 0B 0 In this case, sda is a internal SSD (Samsung EVO) with working TRIM and sdb is a HDD.