5 thoughts on “How does LUN understand in the disk array?”

  1. Lun's full name is Logical Unit Number, which is the logical unit number. We know that the number of equipment on the SCSI bus is limited, generally 6 or 15.
    1. There are multiple Lun Device under each target. We usually referred to as Lun Device as LUN. We have enhanced the ability of the device.
    2, Lun ID does not mean a certain device, just a number, does not represent any physical attributes. In our actual environment, the LUN we encounter may be a disk space, a tape machine, or a Media CHANGER and many more.
    3, the mystery of LUN (relative to some novices) is that it is often not a visible entity, but some virtual objects, such as a array cabinet, the host is regarded as a target device For some special needs, we must divide the disk space of the disk array cabinet into several small units for the host, so there is some logical drive.

  2. What are the functions of the common disk array type?

    n00:00 / 04: 0570% shortcut keys to describe space: Play / suspend ESC: exit full screen ↑: increase volume 10% ↓: reduced volume decrease by 10% →: single fast forward 5 seconds ←: single fast retreat 5 seconds Press hold down and hold it holding up. Here you can drag no longer appear in the player settings to reopen the small window shortcut key description

  3. Lun's full name is Logical Unit Number, which is the logical unit number. We know that the number of equipment on the SCSI bus is limited, generally 6 or 15. We can use Target ID (also known as SCSI ID) to describe these devices. As long Code, when we distinguish the device, as long as the number is the number, it will be OK.
    The objects we actually need to describe are far beyond the number, so we introduce the concept of LUN, that is, the role of Lun ID is to expand the target ID. There can be multiple Lun Device under each target. We usually referred to as Lun Device as LUN, so that the description of each device has the original Target X to become target x lun y, so obvious, we describe the device description device The ability is enhanced.
    So we can summarize. Lun is just a method that we introduce in order to use and describe more equipment and objects. There is nothing special at all.
    Lun ID does not mean a certain device, it is just a number, it does not represent any physical attributes. In our actual environment, the LUN we encounter may be a disk space, a tape machine, or a Media CHANGER, etc. Essence
    lun's mystery (relative to some novices) is that it is often not a visible entity, but some virtual objects. For example, a array cabinet, the host is regarded as a target device. For some special needs, we must divide the disk space of the disk array cabinet into several small units to the host, so what logic has some logic produced The driver's statement is a lower logical object that is lower than the Target Device level. We are used to calling these smaller disk resources as LUN0, LUN1, LUN2 ... or something. As a result of the operating system mechanism, the minimum storage object level of the operating system recognition is Lun Device, which is a logical object, so it is often called Logical Device.

  4. Lun's full name is Logical Unit Number, which is the logical unit number. We know that the number of equipment on the SCSI bus is limited, generally 6 or 15. We can use Target ID (also known as SCSI ID) to describe these devices. As long Code, when we distinguish the device, as long as the number is the number, it will be OK.
    The objects we actually need to describe are far beyond the number, so we introduce the concept of LUN, that is, the role of Lun ID is to expand the target ID. There can be multiple Lun Device under each target. We usually referred to as Lun Device as LUN, so that the description of each device has the original Target X to become target x lun y, so obvious, we describe the device describing the device The ability is enhanced. For example, you used to post things to others. When writing addresses, you can write:
    XXX (closed)
    but more and more from high -rise buildings, but You have to write like this:
    XX, No. 54 XX Building 518, XX City, XX City, XXX (closed)
    So we can summarize, LUN is a one we introduced to more equipment and objects in order to use and describe more equipment and objects. The method is just, there is nothing special at all.

  5. The problem that the whole west can't understand. Follow me what FHJH was in the hard disk. Do you know? Make up your question, brother, brother

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