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The core idea of ReadyBoost is that a flash memory (e.g. a USB flash drive or an SSD) has a much faster seek time than a typical magnetic hard disk (less than 1 ms), allowing it to satisfy requests faster than reading files from the hard disk. It also leverages the inherent advantage of two parallel sources from which to read data, whereas ...
It accomplishes this by caching files that are needed by an application to RAM as the application is launched, thus consolidating disk reads and reducing disk seeks. This feature was covered by US patent 6,633,968. [2] [3] Since Windows Vista, the Prefetcher has been extended by SuperFetch and ReadyBoost. SuperFetch attempts to accelerate ...
Every time I've enabled ReadyBoost on different computers, running Windows 7 or later, using either a USB 2.0 or USB 3.0 storage device for ReadyBoost, the performance of Windows is noticeably slower! Yes the USB 3.0 device was connected to a USB 3.0 port. Remove ReadyBoost and the performance magically improves.
Disk Defragmenter, SuperFetch, Windows Defender, Windows Search, and applications that run at startup all use prioritized I/O. [3] Prior to Windows Vista, all I/O requests were capped at 64 KB; thus larger operations had to be completed in chunks. In Windows Vista, there is no limit on the size of I/O requests.
It is designed to leverage features introduced in Windows Vista, namely ReadyBoost (a supplementation of RAM-based disk caching by dedicated files on flash drives, except on the 512 MB version) and/or ReadyDrive (a non-volatile caching solution, i.e. an implementation of a hybrid drive, as long as the main storage isn't already one); [5] as ...
The size of a caching extent must range between 32 KB and 1 GB, and it must be a multiple of 32 KB; typically, the size of a caching extent is between 256 and 1024 KB. The choice of the caching extents bigger than disk sectors acts a compromise between the size of metadata and the possibility for wasting cache space.