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  2. Self-Monitoring, Analysis and Reporting Technology - Wikipedia

    en.wikipedia.org/wiki/Self-Monitoring,_Analysis...

    If there is an immediate need to update the offline attributes, the HDD slows down and the offline attributes get updated. The latest "S.M.A.R.T." technology not only monitors hard drive activities but adds failure prevention by attempting to detect and repair sector errors.

  3. File attribute - Wikipedia

    en.wikipedia.org/wiki/File_attribute

    (User and System) Compressed: Read-only attribute for files compressed using HFS+ Compression In these systems, the chflags and ls commands can be used to change and display file attributes. To change a "user" attribute on a file in 4.4BSD-derived operating systems, the user must be the owner of the file or the superuser; to change a "system ...

  4. chattr - Wikipedia

    en.wikipedia.org/wiki/Chattr

    This avoids a certain amount of disk I/O operations. Append only a +a to set-a to clear [note 1] A file with the a attribute set can only be open in append mode for writing. Compressed c +c to set-c to clear [note 2] A file with the c attribute set is automatically compressed on the disk by the kernel. A read from this file returns uncompressed ...

  5. Error recovery control - Wikipedia

    en.wikipedia.org/wiki/Error_recovery_control

    For example, in FreeBSD the ATA/CAM stack controls the timeouts, and is set to progressively increase the timeouts as they occur. Thus, if a desktop disk without TLER starts delaying a response to a sector read, FreeBSD will retry the read with successively longer timeouts to prevent prematurely dropping the disk out of the array.

  6. GUID Partition Table - Wikipedia

    en.wikipedia.org/wiki/GUID_Partition_Table

    Operating systems and tools which cannot read GPT disks will generally recognize the disk as containing one partition of unknown type and no empty space, and will typically refuse to modify the disk unless the user explicitly requests and confirms the deletion of this partition. This minimizes accidental erasures. [9]

  7. List of file systems - Wikipedia

    en.wikipedia.org/wiki/List_of_file_systems

    A FAT12 and FAT16 (and FAT32) extension to support automatic file distribution across nodes with extra attributes like local, mirror on update, mirror on close, compound on update, compound on close in IBM 4680 OS and Toshiba 4690 OS. The distribution attributes are stored on a file-by-file basis in special entries in the directory table. [21] [22]

  8. List of Java bytecode instructions - Wikipedia

    en.wikipedia.org/wiki/List_of_Java_bytecode...

    This is a list of the instructions that make up the Java bytecode, an abstract machine language that is ultimately executed by the Java virtual machine. [1] The Java bytecode is generated from languages running on the Java Platform, most notably the Java programming language.

  9. Data erasure - Wikipedia

    en.wikipedia.org/wiki/Data_erasure

    Permanent data erasure goes beyond basic file deletion commands, which only remove direct pointers to the data disk sectors and make the data recovery possible with common software tools. Unlike degaussing and physical destruction, which render the storage media unusable, data erasure removes all information while leaving the disk operable.