The boot drive on my file server has been really slow, hdparm was returning some really low numbers and CPU was spiking, which i wasn’t expecting on my new hardware. I decided this morning to do some google searches.
Here is the original hdparm results
sudo hdparm -t /dev/sdf
/dev/sdf:
 Timing buffered disk reads:    4 MB in  3.56 seconds =   1.12 MB/sec
Then i added the following in /etc/modprobe.d/blacklist
blacklist ata_generic
and in /etc/initramfs-tools/modules added
pata_atiixp
blacklist ata_generic
rebuilt the initramfs
sudo update-initramfs -u -v
rebooted and now I get
sudo hdparm -t /dev/sdf
/dev/sdf:
 Timing buffered disk reads:  220 MB in  3.02 seconds =  72.83 MB/sec