Hello
I´m running omv on a odroid-xu4 and have two USB 3.0 3TB external hard drives connected. One of the disks has a extrem slow write speed (9MB/s). The other one is totally fine.
Used commands for the read/write measuring:
write: dd if=/dev/zero of=tempfile bs=1M count=1024 conv=fdatasync,notrunc
read: echo 3 | sudo tee /proc/sys/vm/drop_caches
dd if=tempfile of=/dev/null bs=1M count=1024
disk-1
- type: external USB 3.0 3Tb
- manufacturer: Western Digital
- purchased: 2009
- ext4
- write: 9Mb/s
- read: 98MB/s
disk-2
- type: external USB 3.0 3Tb
- manufacturer: Seagate
- purchased: 2016
- ext4
- write: 109Mb/s
- read: 104MB/s
One year ago I used disk-1 with ntfs on a windows machine. The write speed back then was fine.
I have absolutely no idea what the problem could be, as disk-2 is working as expected.
Looking forward on your suggestions.
mopmop