![]() Windows Vista allows only one device to be used, while Windows 7 allows multiple caches, one per device, up to a total of 256 GB. In Windows 7 or later with NTFS or exFAT formatting, the maximum cache size is 32 GB per device. In Vista or with FAT32 formatting of the drive, the maximum is 4 GB. When a compatible device is plugged in, the Windows AutoPlay dialog offers an additional option to use the flash drive to speed up the system an additional ReadyBoost tab is added to the drive's properties dialog where the amount of space to be used can be configured. Accordingly, ReadyBoost includes logic that recognizes large, sequential read requests and has the hard disk service these requests instead. Gaining the benefit of caching implies that ReadyBoost will access the flash memory for random bits of data. USB flash devices typically are faster than mechanical hard disks for random access, and slower than mechanical hard disks for sequential access. ![]() This caching applies to all disk content, not just the page file or system DLLs. Using ReadyBoost-capable flash memory ( NAND memory devices) for caching allows Windows Vista and later to service random disk reads with better performance than without the cache. ![]() ReadyDrive for hybrid drives is implemented in a manner similar to ReadyBoost. ![]() ReadyBoost relies on the SuperFetch and also adjusts its cache based on user activity. ReadyBoost enables NAND memory mass storage CompactFlash, SD card, and USB flash drive devices to be used as a cache between the hard drive and random access memory in an effort to increase computing performance. ReadyBoost (codenamed EMD ) is a disk caching software component developed by Microsoft for Windows Vista and included in later versions of Windows.
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