My settings in user scripts:
#!/bin/bash
# Show status
echo "Current drive status: "
hdparm -W /dev/sd[b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q]
# Enable write caching
hdparm -W 1 /dev/sd[b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q]
# Show status again
echo "Finished running, check if the write cache was enabled!"
hdparm -W /dev/sd[b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q]
The letter for hdd.
Hdd's :
WD red and white in a netapp disk shelf
Work for me
Greets