Questions[gnome-disk-utility](ubuntu)

I am using a 970 EVO 1TB NVME SSD (2500MB/s SLC-Cached (1200MB/s TLC)) and a MX300 SATA SSD in my system.

After running some benchmarks I realized that the NVME SSD is not as fast as I hoped it would be.

According to the gnome disk benchmark I get and avg. write speed of 620 MB/s on my NVME and 499 MB/s on my SATA SSD. I get the same results when copying files manually.

Does NVME SSDs have to be configured specially in Linux?

I installed Windows and copied a 12 GB file on both systems. Under Windows I have about twice the performance as under Linux.

I found a thread with a similar issue https://askubuntu.com/a/1271465/961371 but without a solution.

EDIT: Testing different Kernels

On the latest Ubuntu live USB stick, I get bad speed, but on a Linux Mint 18.2 (Kernel 4.8.0.-53) live USB stick I get good speeds (see second image).

cat /sys/block/nvme0n1/queue/scheduler
4.8.0.-53 = none
newer kernel = [none] mq-deadline kyber

I recently mounted a new FAT32 HDD to my desktop (Ubuntu 18.04). After initially partitioning the drive I wanted to partition a larger space but realized that my GNOME disks management utility window is frozen when it loads and does not allow me to use any of the options or diagnostics without freezing. Output of fdisk -l on mounted drive can be viewed below. Although probably irrelevant, I also added an image of the disk management window. The freezing occurs once I try to resize the window or press any menu option. Also I am unable to check on the 2TB drive. Hopefully I can get some leads on how to fix this issue, Thanks.

[UPDATE] This problem actually is not local to just the gnome-disks utility but to any gnome related window. My files window and help center window also freeze.

I am having problems with my USB stick. From the disks utility I can see its size, model and Serial Number but I can't make a NTFS partition on it. Previously I had another problem with the same USB stick here. How can I fix it?

$ sudo mkfs -t ntfs /dev/sdb
/dev/sdb is not a block device.
Refusing to make a filesystem here!

I have a problem with disks. When I try to test the velocity of my hard drive, the system show me a message that says "error unmounting /dev/sda2: target is busy (udisks-error-quark,14)", but it's only when I put the write option too. I only have ubuntu in my laptot. Thank you every one. PD:sorry for my english.

How can I create compressed images with GNOME Disks?
If it is not possible, what do you suggest instead?