Struct DriveModel 

pub struct DriveModel { /* private fields */ }

A drive: where the head is, how long a read takes, how long a seek takes.

Implementations

impl DriveModel

pub fn double_speed() -> Self

Double speed, nominal seeks, the measured table, clamped beyond 512 sectors, instant abort.

pub fn single_speed() -> Self

The same at single speed. The seek table was measured at double speed and is kept as is (an assumption).

pub fn with_variance(self, variance: Variance) -> Self

Choose how seek time varies between runs.

pub fn with_far_seek_millis(self, millis: u32) -> Self

Seek time for any distance beyond the measured 512 sectors. Unmeasured: the default clamps to the 512-sector value.

pub fn with_abort_micros(self, micros: u32) -> Self

Time a cancelled read takes to stop (default 0: unmeasured).

pub fn abort_micros(&self) -> u32

Time a cancelled read takes to stop.

pub fn micros_per_sector(&self) -> u32

Microseconds to read one sector.

pub fn head(&self) -> Option<u32>

The sector under the head, when known.

pub fn lose_head(&mut self)

Forget the head position (after an abort or a stop).

pub fn nominal_seek_micros(&self, distance: u32) -> u32

The table seek time in microseconds for a jump of distance sectors, before variance. Linear between measured points (an assumption).

pub fn read(&mut self, lba: u32, sectors: u32) -> (u64, bool)

Time to read sectors sectors starting at lba, moving the head. A read that starts where the head already is needs no seek (the transport chains contiguous requests). Returns (micros, seeked).

Trait Implementations

impl Clone for DriveModel

fn clone(&self) -> DriveModel

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for DriveModel

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.