tunables control how the io scheduler works. You can find these entries
in:
-/sys/block/<device>/iosched
+/sys/block/<device>/queue/iosched
assuming that you have sysfs mounted on /sys. If you don't have sysfs mounted,
you can do so by typing:
read_expire (in ms)
-----------
-The goal of the deadline io scheduler is to attempt to guarentee a start
+The goal of the deadline io scheduler is to attempt to guarantee a start
service time for a request. As we focus mainly on read latencies, this is
tunable. When a read request first enters the io scheduler, it is assigned
a deadline that is the current time + the read_expire value in units of
-miliseconds.
+milliseconds.
write_expire (in ms)