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  2. Logical volume management - Wikipedia

    en.wikipedia.org/wiki/Logical_volume_management

    A hybrid volume is any volume that intentionally and opaquely makes use of two separate physical volumes. For instance, a workload may consist of random seeks so an SSD may be used to permanently store frequently used or recently written data, while using higher-capacity rotational magnetic media for long-term storage of rarely needed data.

  3. Storage virtualization - Wikipedia

    en.wikipedia.org/wiki/Storage_virtualization

    Host-based virtualization requires additional software running on the host, as a privileged task or process. In some cases volume management is built into the operating system, and in other instances it is offered as a separate product. Volumes (LUN's) presented to the host system are handled by a traditional physical device driver.

  4. Volume Table of Contents - Wikipedia

    en.wikipedia.org/wiki/Volume_Table_of_Contents

    Additionally, it contains an entry for every area of contiguous free space on the volume. The third record on the first track of the first cylinder of any DASD (e.g., disk) volume is known as the volume label and must contain a pointer to the location of the VTOC. The location of the VTOC may be specified when the volume is initialized.

  5. Btrfs - Wikipedia

    en.wikipedia.org/wiki/Btrfs

    Having that available, a snapshot of this new volume can be created. [57] A subvolume in Btrfs is quite different from a traditional Logical Volume Manager (LVM) logical volume. With LVM, a logical volume is a separate block device, while a Btrfs subvolume is not and it cannot be treated or used that way. [64]

  6. Allocation (oil and gas) - Wikipedia

    en.wikipedia.org/wiki/Allocation_(oil_and_gas)

    Allocation is an ongoing process based on flow or volume measurements, and gives the distribution of contributing sources, often with a final calculation per day, which in turn provides the basis for a daily production report in the case of a field that produces hydrocarbons.

  7. Volume (computing) - Wikipedia

    en.wikipedia.org/wiki/Volume_(computing)

    In computer data storage, a volume or logical drive is a single accessible storage area with a single file system, typically (though not necessarily) resident on a single partition of a hard disk. Although a volume might be different from a physical disk drive, it can still be accessed with an operating system's logical interface.

  8. Logical Volume Manager (Linux) - Wikipedia

    en.wikipedia.org/wiki/Logical_Volume_Manager_(Linux)

    To bring a volume group online, the "vgchange" tool: Searches for PVs in all available block devices. Parses the metadata header in each PV found. Computes the layouts of all visible volume groups. Loops over each logical volume in the volume group to be brought online and: Checks if the logical volume to be brought online has all its PVs visible.

  9. Buddy memory allocation - Wikipedia

    en.wikipedia.org/wiki/Buddy_memory_allocation

    One version of the buddy allocation algorithm was described in detail by Donald Knuth in volume 1 of The Art of Computer Programming. [2] The Linux kernel also uses the buddy system, with further modifications to minimise external fragmentation, along with various other allocators to manage the memory within blocks.