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Access-control list. In computer security, an access-control list ( ACL) is a list of permissions [ a] associated with a system resource (object or facility). An ACL specifies which users or system processes are granted access to resources, as well as what operations are allowed on given resources. [ 1] Each entry in a typical ACL specifies a ...
File-system permissions. Most file systems include attributes of files and directories that control the ability of users to read, change, navigate, and execute the contents of the file system. In some cases, menu options or functions may be made visible or hidden depending on a user's permission level; this kind of user interface is referred to ...
Extended file attributes are file system features that enable users to associate computer files with metadata not interpreted by the filesystem, whereas regular attributes have a purpose strictly defined by the filesystem (such as permissions or records of creation and modification times). Unlike forks, which can usually be as large as the ...
The file system uses an index table stored on the device to identify chains of data storage areas associated with a file, the File Allocation Table ( FAT ). The FAT is statically allocated at the time of formatting. The table is a linked list of entries for each cluster, a contiguous area of disk storage. Each entry contains either the number ...
PCI devices have a set of registers referred to as configuration space and PCI Express introduces extended configuration space for devices. Configuration space registers are mapped to memory locations. Device drivers and diagnostic software must have access to the configuration space, and operating systems typically use APIs to allow access to ...
It does not require new system APIs, and most file system filters continue to work with ReFS volumes. [2] ReFS supports many existing Windows and NTFS features such as BitLocker encryption, Access Control Lists, USN Journal, change notifications, [9] symbolic links, junction points, mount points, reparse points, volume snapshots, file IDs, and ...
The capacity of a Lustre file system is the sum of the capacities provided by the OSTs. Client(s) that access and use the data. Lustre presents all clients with a unified namespace for all of the files and data in the filesystem, using standard POSIX semantics, and allows concurrent and coherent read and write access to the files in the filesystem.
exFAT ( Extensible File Allocation Table) is a file system introduced by Microsoft in 2006 and optimized for flash memory such as USB flash drives and SD cards. [ 6] exFAT was proprietary until 28 August 2019, when Microsoft published its specification. [ 7] Microsoft owns patents on several elements of its design.