Load Average含义 top命令中的Load Average显示的三个值表示在过去1分钟、5分钟、15分钟的系统负载。 top命令中load average由来
READ MORE »通过ISO文件硬盘安装Ubuntu系统
概述 若我们希望在一台已有Linux系统的机器上安装ubuntu,可以通过光盘安装,也可以直接下载ubuntu ISO文件进行硬盘安装。本文以Ubuntu 11.04为例介绍如何通过硬盘安装ubuntu,也可以用于在U盘上直接启动Ubuntu ISO文件。 可以访问http://www.ubuntu.com网站下载ISO(CDROM格式)文件,也可以到下面地址下载DVD ISO文件:http://cdimage.ubuntu.com/releases/。
READ MORE »硬盘S.M.A.R.T含义
Legend Higher raw value is better Lower raw value is better Critical: red colored row Potential indicators of imminent electromechanical failure ID Hex Attribute name Better Description 01 0x01 Read Error Rate [13] (Vendor specific raw value.) Stores data related to the rate of hardware read errors that occurred when reading data from a disk […]
READ MORE »Linux内核SCSI硬盘盘符分配
我们以Redhat Enterprise Linux 6内核源码2.6.32-71.e16版本为例,分析Linux内核SCSI层是如何给硬盘分配盘符的,即/dev/sda、/dev/sdb … /dev/sdm等盘符的由来。
READ MORE »硬盘S.M.A.R.T. G-sense Error Rate含义
和硬盘振动有关,表明硬盘受到剧烈的振动。 191 0xBF G-sense Error Rate The count of errors resulting from externally-induced shock & vibration. Rate of errors occurring as a result of impact loads. This attribute stores an indication of a shock-sensitive sensor, that is, the total quantity of errors occurring as a result of internal impact loads (dropping drive, wrong installation, etc.). […]
READ MORE »SCSI Sense Key含义
在Linux内核日志中,I/O报错信息包括类似”sd 5:0:3:0: [sdl] Sense Key : Medium Error [current]“语句。 SCSI Sense Key含义如下:
READ MORE »Linux内核I/O报错信息中hostbyte与driverbyte含义
如内核打印以下错误信息: kernel: sd 5:0:3:0: [sdl] Unhandled sense code kernel: sd 5:0:3:0: [sdl] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE kernel: sd 5:0:3:0: [sdl] Sense Key : Medium Error [current] kernel: Info fld=0x2480003f kernel: sd 5:0:3:0: [sdl] Add. Sense: Unrecovered read error kernel: sd 5:0:3:0: [sdl] CDB: Read(10): 28 00 24 80 00 3f 00 00 08 00 kernel: end_request: […]
READ MORE »Linux下文件数据恢复工具TestDisk
TestDisk 是一款开源软件,受GNU General Public License (GPL v2+)条款保护. TestDisk 是一款强大 的免费数据恢复软件! 早期主要是设计用来在使用有缺陷的软件,病毒或人为误操作(如不小心删除分区表)导致的分区丢失后,帮助用户恢复丢失分区,或修复不能启动的磁盘。 用Testdisk来恢复分区表非常简单。
READ MORE »[转]恢复ext3/ext4文件系统删除文件工具 — extundelete
http://extundelete.sourceforge.net/ About extundelete extundelete is a utility that can recover deleted files from an ext3 or ext4 partition. The ext3 file system is the most common file system when using Linux, and ext4 is its successor. extundelete uses the information stored in the partition’s journal to attempt to recover a file that has been deleted […]
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