Machine IO slowing over time

[Ray Frush]

How are you generating I/O and measuring that it is declining?   What is the rate of decline.

Also knowing a little more about the full config would be helpful.



> On Feb 3, 2026, at 07:29, Grant Johnson <grant at amadensor.com> wrote:
> 
> I have a machine that the IO throughput is getting slower steadily over
> time.  the hdparm -t shows 180MB/sec on all of the drives which is not
> impressive, but isn't terrible for spinning rust.   I see nothing
> failing in the SMART data.  RAID resync is not happening right now.
> 
> I am running LVM on top of 2 RAID1 pairs.
> 
> What else should I be checking?