Re: how to enable trim for an external encrypted SSD?
On 11/11/2017 02:31 PM, Joerg Desch wrote:
> 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
> $ 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.
Well, then it appears that the chip (or the kernel driver for it) doesn't
support passing through the TRIM command to the underyling SSD.
If it's the kernel driver there's a chance that'll be fixed in a future
If it's the the chip itself you're stuck without TRIM on the external
Unfortunately I can't say much more about that, I've never had an