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Project website https://debian-handbook.info/
Mailing list for translators debian-handbook-translators@lists.alioth.debian.org
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Translation license GNU General Public License v2.0 or later
Repository https://salsa.debian.org/hertzog/debian-handbook.git
Repository branch jessie/master
Last remote commit cs-CZ: 07 complete 38c31c10
Jaroslav Tesař authored 3 months ago
Repository containing Weblate translations https://hosted.weblate.org/git/debian-handbook/12_advanced-administration/
Filemask*/12_advanced-administration.po
Translation file zh-CN/12_advanced-administration.po
Committed changes 11 months ago
The I in RAID initially stood for <emphasis>inexpensive</emphasis>, because RAID allowed a drastic increase in data safety without requiring investing in expensive high-end disks. Probably due to image concerns, however, it is now more customarily considered to stand for <emphasis>independent</emphasis>, which doesn't have the unsavory flavour of cheapness.
一开始 RAID 中的“I”意为<emphasis>inexpensive</emphasis>(低成本),因为 RAID 不需要借助于昂贵的高端磁盘便可以大幅提升数据的安全性,然而,现在习惯上认为它指的是<emphasis>independent</emphasis>(独立性),去掉了它所谓低成本的不良印象。
11 months ago
<emphasis>CULTURE</emphasis> <foreignphrase>Independent</foreignphrase> or <foreignphrase>inexpensive</foreignphrase>?
<emphasis>文化</emphasis>要<foreignphrase>independent</foreignphrase>还是要<foreignphrase>inexpensive</foreignphrase>?
11 months ago
RAID means <emphasis>Redundant Array of Independent Disks</emphasis>. The goal of this system is to prevent data loss in case of hard disk failure. The general principle is quite simple: data are stored on several physical disks instead of only one, with a configurable level of redundancy. Depending on this amount of redundancy, and even in the event of an unexpected disk failure, data can be losslessly reconstructed from the remaining disks.
RAID 意为磁盘阵列(<emphasis>Redundant Array of Independent Disks</emphasis>)。这一系统的目的是为了防止硬盘故障导致的数据丢失。其主要原理十分简单:把数据存储在多个而非一个物理磁盘上,而其冗余性可以调整。取决于冗余性的大小,即使发生了意外的磁盘故障,数据也可以从剩下的磁盘中无损地还原出来。
11 months ago
In both the RAID and LVM cases, the kernel provides a block device file, similar to the ones corresponding to a hard disk drive or a partition. When an application, or another part of the kernel, requires access to a block of such a device, the appropriate subsystem routes the block to the relevant physical layer. Depending on the configuration, this block can be stored on one or several physical disks, and its physical location may not be directly correlated to the location of the block in the logical device.
在 RAID 和 LVM 的场合下,内核提供一个 block device 文件,它类似于那些对应硬盘驱动或分区的 block device 文件。当应用程序或内核的另一部分请求访问该设备的一个块时,对应的子系统会把块关联到相关的硬件层面。这个块可以据配置需要存储到一个或几个实体磁盘上,它的实际位置可能不会直接反应块在逻辑设备中的位置。
11 months ago
Among the noteworthy features are the ability to take a snapshot of a filesystem tree at any point in time. This snapshot copy doesn't initially use any disk space, the data only being duplicated when one of the copies is modified. The filesystem also handles transparent compression of files, and checksums ensure the integrity of all stored data.
<emphasis>btrfs</emphasis>值得一提的特性之一是它可以在任意时间点创建文件系统树的快照。该快照一开始不会占用任何磁盘空间,而它会在副本发生更改时复制数据。该文件系统还会处理文件的透明压缩,以及保证存储数据完整性的校验和。
11 months ago
Among the noteworthy features are the ability to take a snapshot of a filesystem tree at any point in time. This snapshot copy doesn't initially use any disk space, the data only being duplicated when one of the copies is modified. The filesystem also handles transparent compression of files, and checksums ensure the integrity of all stored data.
<emphasis>btrfs</emphasis>值得一提的特性之一是它可以在任意时间点创建文件系统树的快照。该快照一开始不会占用任何磁盘空间,而它会在副本发生更改时复制数据。该文件系统还会处理文件的透明压缩,以及保证存储数据完整性的校验和。
11 months ago
Committed changes 11 months ago
While LVM and RAID are two distinct kernel subsystems that come between the disk block devices and their filesystems, <emphasis>btrfs</emphasis> is a new filesystem, initially developed at Oracle, that purports to combine the featuresets of LVM and RAID and much more. It is mostly functional, and although it is still tagged “experimental” because its development is incomplete (some features aren't implemented yet), it has already seen some use in production environments. <ulink type="block" url="http://btrfs.wiki.kernel.org/" />
由于 LVM 和 RAID 为在磁盘和 block device 间的两种不同的内核子系统,一开始开发于甲骨文公司的新文件系统<emphasis>btrfs</emphasis>便担当了组合 LVM 和 RAID 特性集和其他东西的角色。尽管其因为开发尚未完成(某些特性还未实现)而被标为“实验性”,但很多生产环境下已经开始把它投入实用。<ulink type="block" url="http://btrfs.wiki.kernel.org/" />
11 months ago
RAID and LVM are both techniques to abstract the mounted volumes from their physical counterparts (actual hard-disk drives or partitions thereof); the former secures the data against hardware failure by introducing redundancy, the latter makes volume management more flexible and independent of the actual size of the underlying disks. In both cases, the system ends up with new block devices, which can be used to create filesystems or swap space, without necessarily having them mapped to one physical disk. RAID and LVM come from quite different backgrounds, but their functionality can overlap somewhat, which is why they are often mentioned together.
RAID 和 LVM 都是将已挂载的卷从它们的硬件层面对应物(它们实际的硬盘驱动或分区)抽象化出来的技术。前者通过冗余来保护数据免遭硬件故障的影响,后者可让卷管理更加灵活而不受底层硬盘的实际大小的限制。无论前者还是后者,系统实际上都是可用来无需将它们映射到单个物理磁盘便可创建文件系统或交换空间的新的 block device。RAID 和 LVM 诞生的背景大相径庭,然而却有某些相同的功能,因此人们经常同时提起它们。
11 months ago
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