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邏輯磁碟管理工具

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邏輯磁碟管理工具(Logical Disk Manager,簡稱LDM)是微軟及Veritas Software共同開發的硬碟分割系統。這工具從Windows 2000開始引入,在Windows XPWindows Server 2003Windows Vista亦有提供。

IDs for partitions used by the LDM
ID (GUID Partition Table and MBR Partition Table) Description
GPT: 5808C8AA-7E8F-42E0-85D2-E1E90434CFB3 MBR: None1 "metadata" partition. The area of the disc that is used for holding configuration data that describe the volumes that LDM manages.
GPT: AF9B60A0-1431-4F62-BC68-3311714A69AD MBR: 0x42 "data" partition. The area of the disc that is used for holding LDM volumes themselves.

目录

[编辑] 簡介

在一般的微軟作業系統中,基本儲存設備(例如:硬碟)可以分割成為主要分割(Primary partition)或延伸分割(Extended Partition)。理論上,延伸分割可以有無限個,但主要分割最多只能有四個。[1]

[编辑] 動態硬碟

在微軟的作業系統中,把一般的未處理硬碟稱之為基本硬碟。基本硬碟可以「升級」成為動態硬碟。

動態磁碟的功能使作業系統可以透過軟件控制來模擬RAID控制卡,把多個硬碟整合成為一個或多個不同架構的磁區。不過,動態磁碟只有Windows 2000或以上的系統才支援,而Linux亦要內核在版本2.4.8或更新的版本才支援。有說把硬碟升級成動態磁碟會引起大問題,但沒有具體的證明。Template:Citeneeded

為了提高動態硬碟的可攜性,動態硬碟的分割資料儲存在硬碟上,約佔8MB左右。這功能從Windows 2000起開始提供。所以,現時在較新的作業系統底下,都會發覺硬碟的可用空間比實際應有的少了大約8MB。這是因為微軟用了該部份來儲存動態硬碟的資料。在未有這新功能的Windows NT 4.0,動態硬碟都只可以在本機使用。一旦本機的作業系統失效或故障,內裡的資料就永遠不能再被讀取。

雖然理論上每隻動態硬碟上最多可以有2000個動態磁區,但微軟建議最多只好建立32個。

[编辑] 附註

  • 註解1: On a disc partitioned with the MBR Partition Table scheme, the LDM metadata are not stored in a partition, but are stored in a 1MiB area at the end of the disc that is not assigned to any partition[2]. The disc partitioning tools in Windows XP will not use that area for disc partitions. But the tools in other operating systems might.

[编辑] 參考

  1. How Basic Disks work- Microsoft TechNet -
  2. How Dynamic Disks work- Microsoft TechNet -

[编辑] 參看

  • 動態磁碟 (Dynamic disks)
  • 邏輯磁區管理:邏輯容體管理員(HP-UX譯名)/邏輯磁碟區管理員(Linux譯名)
  • Microsoft Windows元件列表

[编辑] 外部連結

zh:邏輯磁碟管理工具

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