what is a logical disk
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logical partition (LPAR) Part of the Hardware glossary: A logical partition (LPAR) is the division of a computer's processor s, memory, and storage into multiple sets of resources so that each set of resources can be operated independently with its own operating system instance and application s.
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Optical disc drive Lenses from a Blu-ray writer in a Sony Vaio E series laptop. In computing, an optical disc drive (ODD) is a disk drive that uses laser light or electromagnetic waves within or near the visible light spectrum as part of the process of reading or writing data to or from optical discs.
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What is LVM and what is it used for? You can think of LVM as dynamic partitions, meaning that you can create/resize/delete LVM partitions (they're called Logical Volumes in LVM-speak) from the command line while your Linux system is running: no need to reboot the system to make the kernel aware of the newly-created or resized partitions.
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Master Boot Record It contains the only information on the first side of the first cylinder of each logical drive in the extended partition. The boot sector in a logical drive is usually located at either Relative Sector 32 or 63. However, if there is no extended partition on a disk, there are no EBRs and no logical drives.artition Table. The partition table, a 64-byte data structure used to identify the type and location of partitions on a hard disk, conforms to a standard layout independent of the operating system. Each partition table entry is 16 bytes long, with a maximum of four entries.
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Magnetic Disk Definition - What does Magnetic Disk mean? A magnetic disk is a storage device that uses a magnetization process to write, rewrite and access data. It is covered with a magnetic coating and stores data in the form of tracks, spots and sectors. Hard disks, zip disks and floppy disks are common examples of magnetic disks.
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Disk mirroring Disk mirroring. RAID 1 layout. In data storage, disk mirroring is the replication of logical disk volumes onto separate physical hard disks in real time to ensure continuous availability. It is most commonly used in RAID 1. A mirrored volume is a complete logical representation of separate volume copies.
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Logical Volume Manager (Linux) In Linux, Logical Volume Manager (LVM) is a device mapper target that provides logical volume management for the Linux kernel. Most modern Linux distributions are LVM-aware to the point of being able to have their root file systems on a logical volume. Heinz Mauelshagen wrote the original LVM code in 1998, taking its primary design guidelines from the HP-UX's volume manager.
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Fast Guide to CD/DVD Drives (such as the hard drive, floppy drive, CD-ROM, CD-R, CD-RW, and DVD-ROM drives) are the hardware devices that read computer data from disks. After the hardware is installed, the operating system will assign a drive letter.
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"Whatâs the difference between a ""disc"" and a ""disk?""" Disks. A disk refers to magnetic media, such as a floppy disk, the disk in your computer's hard drive, an external hard drive. Disks are always rewritable unless intentionally locked or write-protected. You can easily partition a disk into several smaller volumes, too.
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Using the Microsoft Deployment Toolkit To create a new partition or logical drive on a basic disk: 1  In the Disk Management window, complete one of the following procedures, and then continue to step 2: 2  To create a new partition, right-click on the Unallocated space on the Basic disk where you want to create the partition, and then click New Partition.ow to use Disk Management to set up a Hard Drive. To start Disk Management: 1  Log on as administrator or as a member of the Administrators group. 2  In the console tree, click Disk Management.
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disk drive disk drive. n. Computers. A hardware device that reads data stored on a disk and writes data onto the disk for storage. disk drive. n. (Computer Science) computing the controller and mechanism for reading and writing data on computer disks. See also disk2.
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Port Forwarding for VoIP Enter an Application name of the service you want to forward, in this case we are forwarding SIP and RTP, so that is what we picked as names. 1  Enter the Port Range Start and End of the service you want to forward. 2  Select the protocol used by the services (In most cases UDP would be the protocol of SIP and RTP.).
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What is the difference between physical core and logical core? A logical core is more of a programming abstraction than an actual physical entity. A simple definition of a logical core is that it is a processing unit that is capable of executing its own thread in parallel with other logical cores. In fact you could say that a logical core is the same as a thread. You can have multiple logical cores per physical core.
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What Is Logical Database Design? Logical Database Design Overview. As a designer of logical databases, you can develop a set of processes that serve a business or organization. Logical database design is a duty of a database administrator and involves gathering a business' organization and processes so the database can accommodate the business. After this data has been gathered, you could create a logical model to map the functions and relationships between the processes and data. Once a logical model is diagrammed, you can make a physical database model that implements the information gathered for the logical model.
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Logical Disk Manager The Logical Disk Manager (LDM) is an implementation of a logical volume manager for Microsoft Windows NT, developed by Microsoft and Veritas Software. It was introduced with the Windows 2000 operating system, and is supported in Windows XP, Windows Server 2003, Windows Vista, Windows 7, Windows 8, and Windows 10. The MMC-based Disk Management snap-in (diskmgmt.msc) hosts the Logical Disk Manager. On Windows 8 and Windows Server 2012, LDM was deprecated in favor of Storage Spaces. Logical Disk Manager enables disk volumes to be dynamic, in contrast to the standard basic volume format.
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Logical Disk Manager Definition - What does Logical Disk Manager mean? The Logical Disk Manager (LDM) is the Microsoft version of a logical volume manager that was first introduced in Windows 2000, and is supported in Windows XP and Windows 7. Microsoft licensed this software from Veritas Software; the two companies then co-developed it further.
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RAID RAID is a term used in computing. With RAID, several hard disks are made into one logical disk. There are different ways this can be done. Each of the methods that puts the hard disks together has some benefits and drawbacks over using the drives as single disks, independent of each other.
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Logical Disk Manager Logical Disk Manager enables disk volumes to be dynamic, in contrast to the standard basic volume format. Basic volumes and dynamic volumes differ in ability to extend storage beyond one physical disk. Basic partitions are restricted to a fixed size on one physical disk.
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What Is a Floppy Disk? A floppy disk is a magnetic storage medium for computer systems. It came in several different sizes, including the 8-inch and the 3.5-inch, and is composed of a thin and flexible magnetic disk sealed in a square plastic carrier. The different types of floppy disks required a different floppy disk drive.
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"Whatâs the difference between a ""disc"" and a ""disk?""" A disk refers to magnetic media, such as a floppy disk, the disk in your computer's hard drive, an external hard drive. Disks are always rewritable unless intentionally locked or write-protected. You can easily partition a disk into several smaller volumes, too.
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Disk storage Disk storage. Disk storage is a general category of storage mechanisms where data are recorded by various electronic, magnetic, optical, or mechanical changes to a surface layer of one or more rotating disks. A disk drive is a device implementing such a storage mechanism.
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- The /boot partition cannot be on a logical volume group because the boot loader cannot read it. If the root (/) partition is on a logical volume, create a separate /boot partition which is not a part of a volume group. Since a physical volume cannot span over multiple drives, to span over more than one drive, create one or more physical volumes per drive. ⁠. Figure 11.1.
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RAID A hard disk is a part of a computer. Normal hard disks use magnetism to store information. When hard disks are used, they are available to the operating system. In Microsoft Windows, each hard disk will get a drive letter (starting with C:, A: or B: are reserved for floppy drives).
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physical topology The logical topology, in contrast, is the way that the signals act on the network media, or the way that the data passes through the network from one device to the next without regard to the physical interconnection of the devices. A network's logical topology is not necessarily the same as its physical topology. For example, twisted pair Ethernet is a logical bus topology in a physical star topology layout. While IBM's Token Ring is a logical ring topology, it is physically set up in a star topology.
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Chapter 11. LVM (Logical Volume Manager) LVM is a tool for logical volume management which includes allocating disks, striping, mirroring and resizing logical volumes. With LVM, a hard drive or set of hard drives is allocated to one or more physical volumes. LVM physical volumes can be placed on other block devices which might span two or more disks.
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- In other words, the RAID controller presents a map of a logical drive, which Windows sees as a single disk. But this map is translated by the RAID controller according to its own algorithm. This is why I don't think defrag actually defrags the physical disk, but rather the logical disk.ragmentation would be the same across disks irrespective of underlying storage technology. A RAID 5 fragments exactly the same as a RAID 1 volume or a RAID 10 volume or a plain drive.