On Tue, 2017-08-29 at 22:32 +0000, Don Brace wrote: > Users do set max_sectors_kb for performance reasons. They can increase > performance by setting max_sectors_kb to different values depending on > their I/O needs. > > And, if they set the value, and sd_revalidate_disk changes this value, > there is no history of what they set the value to. Hello Don, How about asking these users to create a udev rule instead of directly modifying max_sectors_kb in sysfs? Bart.