. In the computer system, the speed of the hardware running speed is basically determined by the cache. The larger the buffer capacity, the faster the corresponding hardware runs. For many users of old computers, friends who don't want to spend money to speed up may wish to try to make your U disk a system cache. As long as you have an unused USB flash drive in your hand, we can use the ReadyBoost function that comes with Windows 7, and use the USB flash drive as the system cache disk. Although the speed of the USB flash drive is far less than the memory, even the sequential read speed is not as good as the hard disk, but the USB flash drive has One feature is that it has strong random read performance, which is a good carrier for caching.
ReadyBoost consists of a service running in the host process and a volume filter driver (%SystemRoot%System32DriversEcache.sys) implemented in %SystemRoot%System32Emdmgmt.dll. When a flash device is plugged into the system, the ReadyBoost service looks at the device to determine its performance characteristics and stores the test results in HKEY_LOCAL_MACHINESoftwareMicrosoft Windows NTCurrentversionEmdmgmt.
Not all flash devices support the ReadyBoost feature, written in Microsoft's technical documentation: "When the flash device has a capacity between 256MB and 32GB, the transfer rate for a 4KB random read is 2.5MBps or more. High, for a 512KB random write transfer rate of 1.75MBps or higher, ReadyBoost will ask the user if they want to use part of the storage space for disk caching.
Although ReadyBoost can use NTFS, it will limit the maximum cache size to 4GB to accommodate the FAT32 limit. If the user agrees to use the ReadyBoost feature, the service will create a cache file called ReadyBoost.sfcache in the root directory of the device and ask SuperFetch to pre-populate the cache in the background.
After the ReadyBoost service initializes the cache, the Ecache.sys device driver intercepts all read and write data to a local hard disk volume (for example, C:) and copies all data to be written to the cache file created by the service. in. Ecache.sys compresses the data, usually at a compression ratio of 2:1. Thus, a 4GB cache file will typically contain 8GB of data. The driver uses a combination of the Advanced Encryption Standard (AES) and a randomly generated bootstrap session key to encrypt each block it writes to ensure the confidentiality of the data in the cache if the device is removed from the system.
When ReadyBoost determines that the cache in the flash is more suitable for random read than the cache in the hard drive, it will randomly read the data from the flash drive. The ordered read access of the hard disk is significantly better than the flash memory. Therefore, when ReadyBoost detects that the system is using the ordered access data, it will read directly from the disk, even if the data is also located in the flash disk. in.
Based on this principle, ReadyBoost acts as a bridge between memory and hard drive to accelerate system performance. The specific operation is as follows:
1, first we insert the U disk, then in the computer, right click on the U disk icon, select “ attribute & rdquo;, and switch to the Readyboost icon:
2, select the second The item or the third item can be used to open the ReadyBoost function.
After using Readyboost, the small 1TB mechanical hard drive, the original score is 5.9 points, and now the score soared to 7.3 points. It is worth mentioning that ReadyBoost is not a high-end feature in Windows 7, in the family This feature is concentrated in the basic version. Does this confirm your determination to buy genuine? If you are not sure, here we can specify that the home base version of Windows 7 is only 399 yuan in China. At a very low price, and at this price, you can use the ReadyBoost feature to speed up the system and use your unused U disk to speed up the system.
If your system is configured with less than 2GB of memory, the acceleration effect will be very obvious. If your memory exceeds 2GB, you will get a certain degree of acceleration, which is more cost-effective than buying a solid-state hard disk with thousands of dollars. More, so genuine Windows 7 is essential, first of all, the price is cheap, secondly, ReadyBoost is a highly technical feature, piracy systems are often prone to instability, which makes our users not worth the loss, if not Accelerated but harvested the blue screen of death or damage the U disk, which is contrary to our original intention.