(Solved) - Improve network speed over lan

[Nachteule]

@Harald654
Did you already test raw read/write speed from/to external disk?

Terminal

root@xbian:/home/xbian/storage/test# fdisk -l /dev/sdb

Disk /dev/sdb: 698.7 GiB, 750153367552 bytes, 1465143296 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0xfe2dc593

Device Boot Start End Sectors Size Id Type
/dev/sdb1 2048 206847 204800 100M 7 HPFS/NTFS/exFAT
/dev/sdb2 206848 205012079 204805232 97.7G 7 HPFS/NTFS/exFAT
/dev/sdb3 * 205012080 205172729 160650 78.5M 83 Linux
/dev/sdb4 205172736 1465147391 1259974656 600.8G f W95 Ext'd (LBA)
/dev/sdb5 205174784 1465147391 1259972608 600.8G 8e Linux LVM

root@xbian:/home/xbian/storage/test# dd if=/dev/sdb of=/dev/null bs=1M count=1024
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB) copied, 35.7181 s, 30.1 MB/s
root@xbian:/home/xbian/storage/test# dd if=/dev/zero of=2G bs=1M count=2048
2048+0 records in
2048+0 records out
2147483648 bytes (2.1 GB) copied, 64.9729 s, 33.1 MB/s
root@xbian:/home/xbian/storage/test#