enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Read–write memory - Wikipedia

    en.wikipedia.org/wiki/Readwrite_memory

    This means that you can write data to it, and that information will persist even in the absence of a power source. Typically read-write speeds are limited to its bandwidth or have mechanical limitations of either rotation speeds and arm movement delays for storage types such as Cloud Storage , Hard Disk Drive or CD-RWs , DVD-RWs , SD cards ...

  3. Read-only memory - Wikipedia

    en.wikipedia.org/wiki/Read-only_memory

    Read-only memory (ROM) is a type of non-volatile memory used in computers and other electronic devices. Data stored in ROM cannot be electronically modified after the manufacture of the memory device. Read-only memory is useful for storing software that is rarely changed during the life of the system, also known as firmware.

  4. Write-only memory (engineering) - Wikipedia

    en.wikipedia.org/wiki/Write-only_memory...

    In information technology, a write-only memory (WOM) is a memory location or register that can be written to but not read.In addition to its literal meaning, the term may be applied to a situation when the data written by one circuit can be read only by other circuitry.

  5. File-system permissions - Wikipedia

    en.wikipedia.org/wiki/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 as permission-driven.

  6. Shared register - Wikipedia

    en.wikipedia.org/wiki/Shared_register

    A shared (read/write) register, sometimes just called a register, is a fundamental type of shared data structure which stores a value and has two operations: read, which returns the value stored in the register, and write, which updates the value stored. Other types of shared data structures include read–modify–write, test-and-set, compare ...

  7. Readers–writer lock - Wikipedia

    en.wikipedia.org/wiki/Readers–writer_lock

    An RW lock allows concurrent access for read-only operations, whereas write operations require exclusive access. This means that multiple threads can read the data in parallel but an exclusive lock is needed for writing or modifying data. When a writer is writing the data, all other writers and readers will be blocked until the writer is ...

  8. Read-only - Wikipedia

    en.wikipedia.org/wiki/Read-only

    In computer technology, read-only can refer to: Read-only memory (ROM), a type of storage media; Read-only access to memory using memory protection; Read-only access to files or directories in file system permissions; Read-only access for database administrators in database system permissions

  9. Cache coherency protocols (examples) - Wikipedia

    en.wikipedia.org/wiki/Cache_coherency_protocols...

    The cache line is updated both in cache and in MM or only in MM (write no-allocate). Simple to implement, high bandwidth consuming. It is better for single write. Write-Back. Data is written only in cache. Data is Write-Back to MM only when the data is replaced in cache or when required by other caches (see Write policy).