Check that your disks are CMR instead of SMR. If your disks are SMR the more they fill the free space the slower they will become and the more races you will lose.
Also check the health of the disk, that it is not degrading
If you are doing multinode, make sure each node is on a different HDD.
To also improve performance is to move the databases to an SSD disk. Below I leave you the posts that explain how to move the databases