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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."
As a result, a significant amount of time is spent 'jumping' from file to file and back again multiple times, even though a single access would be more efficient. The prefetcher works by watching what data is accessed during the boot process (including data read from the NTFS Master File Table), and recording a trace file of this activity. The ...
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MS-DOS managed hardware device contention (see terminate-and-stay-resident program) by making each device file exclusive open. An application attempting to access a device already in use would discover itself unable to open the device file node. A variety of device driver semantics are implemented in Unix and Linux concerning concurrent access. [4]
If an external data storage device is disconnected while files are being moved or copied, the user can retry the copy or move without restarting the same file operation from the very beginning; this gives the user an option to reconnect the external data storage device without loss of data. Additionally, if a file is in use by another ...
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The extended file system , was released in April 1992 as the first file system using the VFS API and was included in Linux version 0.96c. [21] The ext file system solved the two major problems in the Minix file system (maximum partition size and filename length limitation to 14 characters), and allowed 2 gigabytes of data and filenames of up to ...
Otherwise, obtain an empty page frame in RAM to use as a container for the data, and: Determine whether the page was ever initialized; If so determine the location of the data on disk. Load the required data into the available page frame. Update the page table to refer to the new page frame.