ReadyBoost: Difference between revisions

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* Because ReadyBoost stores its cache as a file on the root directory of the drive rather than using the flash memory without a file system, the file system must be [[Mount (computing)|mounted]] and [[Drive letter assignment|assigned a drive letter]]. The ReadyBoost cache is created on the [[Root directory#Multiple root directories|root directory]] of the drive.
* If the system drive (the primary drive, with Windows system files on it) is a solid-state drive (SSD), ReadyBoost is disabled, since reading from that drive would be at least as fast as reading from the ReadyBoost drive.<ref name=understand>{{cite journal|magazine=[[TechNet Magazine]]|url=http://technet.microsoft.com/en-us/magazine/ff356869.aspx|title=Understand ReadyBoost and whether it will Speed Up your System|publisher=Microsoft|accessdate=2012-12-14}}</ref>
* ReadyBoost caches all data as it is being written to the local hard disk: "the Ecache.sys device driver intercepts all reads and writes to local hard disk volumes (C:\, for example), and copies any data being written into the caching file that the service created."<ref name="russinovich"/> [[Windows_Vista_IWindows Vista I/O_technologiesO technologies#SuperFetch|SuperFetch]] pre-populates frequently-read data into ReadyBoost cache, so SuperFetch is necessary for ReadyBoost to perform well.<ref name="robbiebench">{{cite web|title=ReadyBoost - Robbie's Benchmark|url=http://www.fandecheng.com/archives/397|date=14 April 2012|accessdate=17 October 2014}}</ref>
 
ReadyBoost is not available on [[Windows Server 2008]].<ref>{{cite web
On [[laptop]] computers, the performance shifts more in favor of flash memory when laptop memory is more expensive than desktop memory; many laptops also have relatively slow 4200&nbsp;rpm and 5400&nbsp;rpm hard drives.
 
In versions of Vista prior to SP1, ReadyBoost failed to recognize its cache data upon resume from sleep, and restarted the caching process, making ReadyBoost ineffective on machines undergoing frequent sleep/wake cycles. This problem was fixed in Vista SP1.<ref>[http://www.istartedsomething.com/20070709/vista-sp1-readyboost-bug/ Vista SP1 will fix critical ReadyBoost performance bug<!-- reflinks title -->]</ref>
 
== Limitations==