Low performance

[xsnoopy]

Hi,

I am not necessarily sure if that is an error or issue, but I don´t know where else to ask.

I have very slow performance like around 20Mbit/s when I write on the Samba shares. My server is connected with Gigabit Ethernet and other services run up to the limitation of the Ethernet speed.

I am using a

=== START OF INFORMATION SECTION ===
Device Model: ST2000DM008-2FR102
Serial Number: ZFL0ZYHH
LU WWN Device Id: 5 000c50 0c2fee279
Firmware Version: 0001
User Capacity: 2.000.398.934.016 bytes [2,00 TB]
Sector Sizes: 512 bytes logical, 4096 bytes physical
Rotation Rate: 7200 rpm
Form Factor: 3.5 inches
Device is: Not in smartctl database [for details use: -P showall]
ATA Version is: ACS-3 T13/2161-D revision 5
SATA Version is: SATA 3.1, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is: Tue Sep 1 09:48:18 2020 EDT
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

Harddisk. Formated as ext4 /dev/sda1 on /media/micha/sda1 type ext4 (rw,nosuid,nodev,noatime,data=ordered,user)

htop and top shows me on the host and in the container that there is plenty of CPU usage still available.

How do I improve the performance? Where do I need to look?