As mentioned on the Ubuntu for Android page, the product is marketed towards handset manufacturers rather than end users. It is intended to be integrated into the firmware rather than act as an after market addition to existing phones.
None of the phones you've listed include the code in their firmware, and I don't think any have yet been released.
fstrim supports the option --all on Ubuntu 16.04.
$ lsb_release -dirc
Distributor ID: Ubuntu
Description: Ubuntu 16.04.1 LTS
Release: 16.04
Codename: xenial
$ fstrim --help
Usage:
fstrim [options] <mount point>
Discard unused blocks on a mounted filesystem.
Options:
-a, --all trim all mounted filesystems that are supported
-o, --offset <num> the offset in bytes to start discarding from
-l, --length <num> the number of bytes to discard
-m, --minimum <num> the minimum extent length to discard
-v, --verbose print number of discarded bytes
-h, --help display this help and exit
-V, --version output version information and exit
For more details see fstrim(8).
By default, Ubuntu 16.04 mounts all file systems with relatime. This works much better than noatime while adding only a very small number of write operations.
Do not mess with the I/O scheduler.
For peace of mind, you can use smartctl (install it with sudo apt-get install smartmontools if needed) from time to time to check on Life_Curve_Status, SSD_Life_Left, and Lifetime_Writes_GiB:
$ sudo smartctl --all /dev/sda
...
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
...
194 Temperature_Celsius 0x0022 047 063 000 Old_age Always - 47 (Min/Max 21/63)
...
230 Life_Curve_Status 0x0013 100 100 000 Pre-fail Always - 100
231 SSD_Life_Left 0x0013 100 100 010 Pre-fail Always - 0
...
241 Lifetime_Writes_GiB 0x0032 000 000 000 Old_age Always - 388
...
(Life_Curve_Status and SSD_Life_Left have values in percentage points: you will want to replace the SSD when they decrease below 20% or 10%. If you can, make your terminal 132 columns before running smartctl.)
Finally, please remember that the 850 EVO is a high-quality expensive SSD from a reputable manufacturer. It is resilient and will last a long time, probably longer than any spinning disc. The only thing you can do which Samsung admits that it would help is to overprovision it a little, that is, when partitioning leave about 5% of unpartitioned space. (This will let the internal remapping / garbage collection algorithms work more efficiently; it you decide to do it then do it only when the SSD is new or after a full-disc trim or a security erase so that the overprovisioned space consists entirely of blocks known to be not in use.)
Best Answer
Samsung T3, T5 and now also T7 SSD are NOT compatible with Linux, if encrypted
The proprietary unlock software only comes for Mac or Windows
I tried a long time to unlock an encrypted drive in Linux, even manually by capturing raw USB unlock commands in windows and then attempting to replay in Linux but it is more difficult than I imagined and failed to unlock in Linux. The only solution was a virtual machine which is EXTREMELY annoying Samsung!
I already asked Samsung to release Linux software.
SAMSUNG IF YOU ARE READING, we need T5 / T7 unlock software for Debian/Ubuntu, hurry up already. seriously, this is not good enough. I will start buying m2 drives and using my own custom m2 external case if you dont fix this.
Drive only works on Linux if it is not set to encrypted, which is mostly useless.