Hello,
I've made the Update 5.2 to 6.17 on HP Gen Baremetal, 1.02b.
On 5.2 I had: 250GB / 1 TB / 1 TB / 2 TB , SHR/ext4 - and the speed was about 100-109 MBit/s
On 6.17 I have: 1 TB / 1 TB / 2 TB / 4 TB, SHR/btrfs - and the speed is max. 80, most times about 60 MBit/s
A complete Backup took with 5.2 18-20 hours.
Now I've tried a Backup: after 22 hours it was at 49% and I cancelled it. The speed was only a few kB.
What can I do? Back to ext4?