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What is SMARTDrive?

Simply put, SMARTDrive (SMARTDRV.EXE) creates a disk cache in extended memory. This significantly speeds up MS-DOS disk operations. Therefore, if you're installing Windows from the DOS level, place a copy of SMARTDRV.EXE onto the boot floppy disk that you boot with. After you boot your PC with this disk, execute SMARTDrive by typing SMARTDRV from the A prompt. It will only take a couple of seconds to load. You can then proceed with your installation of Windows. For both Windows 2000 and Windows XP, you begin the installation routine by executing WINNT.EXE, located in the i386 folder of the installation CD.


How does SMARTDrive work?

SMARTDrive is a disk caching program that intercepts system calls to the hard disk to control read/write access to the disk. SMARTDrive intercepts any calls to the hard disk and loads the needed data into a cache it establishes in RAM. (Unless specified otherwise, SMARTDrive automatically determines a reasonable cache size based on the amount of free extended memory available when it initially loads; the maximum amount it will take is around 2 MB.) Subsequent calls to the hard disk are intercepted by SMARTDrive, which scans the cache for the requested data. If the data is already present in the cache, SMARTDrive can access it directly in RAM. If the data is not in the cache, SMARTDrive accesses the hard disk and loads the necessary data into the cache. The least recently used data residing in RAM is cached back to the hard disk to make room for the new data. By loading blocks of data from the hard disk into RAM, SMARTDrive helps decrease the number of calls to the hard disk. This can dramatically speed up applications that repeatedly access the hard disk for data because accessing the hard disk is considerably slower than accessing RAM. Essentially, SMARTDrive attempts to maintain information in RAM that an application needs at any given time from the hard disk.



More Information:

KB Article: Q83325
DUX Computer Digest


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