linux hdd recovery

directly in/etc/fstab, because the sequential encoding of devices in the cloud may change during the shutdown or opening of the cloud server, for example/DEV/SDB5 may become/dev/ Sdb2. It is recommended to use UUID to configure automatic mounting of data disks.Description: The disk's UUID (universally unique identifier) is the unique identification string provided by the Linux system for the storage device.　　Blkid (see UUID for each partition)2. Edit

vg_testPVSize 19.99gib/ notusable1.43MiBAllocatable yes (butfull) PESize 4.00MiBTotalPE 5118FreePE 0AllocatedPE 5118PVUUID fuQdIY-qkJw-fZJB-AauO-Zqpj-91RI-S1GG0X ---Physicalvolume---PVName /dev/sdc1VGName vg_testPVSize 19.99GiB/not usable1.43miballocatable yespenbsp Size4.00mib TotalPE 5118freepe 5116allocatedpe2 PVUUID trlpmq-snm6-u24f-cmha-oivt-xj3w-6fjabpfound that there are still I/O errors appearing, Find the right downtime window, restart the system, and solve the problem (note here to ch

=0 blocks, Stripe width=0 blocks61054976 inodes, 244190646 blocks12209532 blocks (5.00%) reserved for the Super userFirst Data block=0Maximum filesystem blocks=42949672967453 block Groups32768 blocks per group, 32768 fragments per group8192 inodes per groupSuperblock backups stored on blocks:32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968,102400000, 214990848Writing Inode Tables:doneCreating Journal (32768

LVM Disk ManagementI. Introduction of LVM ... 1Second, the basic terminology of LVM ... 2Iii. installation of LVM ... 3Iv. Creating and Managing LVM ... 42. Create PV. 63. Create VG. 74. Create LV. 95. LV format and Mount ... 10I. Introduction of LVMLVM is shorthand for Logical Volume Manager (Logical Volume management), which is implemented by Heinz Mauelshagen on the Linux 2.4 kernel. LVM sets the partition of one or more hard disks logically, equiv

One: Eliminate the shellThere are three styles of ringtones: none, Visible,(1) To eliminate the shell alarm sound, is to press the TAB key is not the sound:Add a line to the/ETC/INPUTRC: (I tried it in RedHat9.0)Set Bell-style NoneSave and restart the system.II: Elimination of VI(1) Interim plansudo rmmod PCSPKRFor Debian/ubuntu users, just open your terminal and run the above command. For Centos/redhat/rhel/fedora Linux users, you need to log in as r

There are two ways to mount a hard disk on a Linux system:1, MOUNT/DEV/SDB1 (hard disk location)/HOME/TEMP1 (Mount position)2, NTFS-3G/DEV/SDB1 (hard disk location)/HOME/TEMP1 (Mount position)If the hard disk location cannot be determined at this time, you can view the disk partition using the following command line:1, Cat/proc/partitions2, disk load time and other details: Ll/dev/disk/by-pathUse the following command to read the contents of the drive

ioengine. The default value is Sync Sync blocking I/o,libaio is the native asynchronous I/O for Linux.There are usually two ways of synchronizing and asynchrony. The synchronized IO can only issue one IO request at a time, waiting for the kernel to complete before returning, so that the iodepth is always less than 1, but multiple threads concurrently can make iodepth larger. The asynchronous approach is to commit a batch of requests at once, waiting for a batch to complete, reducing the number

a write cache example for a hard disk: Hdparm-i/dev/sha #获取硬盘的详细信息 hdparm-c/dev/sda #检测硬盘的电源管理模式 Hdparm-t #测试硬盘的读取速度 (without cache) Hdparm-t #测试硬盘快取的读取速 Degrees Hdparm-tt--DIRECT/DEV/SDA #测试硬盘的真实读取速度其他的一些相关命令：fsck 检查并修复linux中的文件系统 格式： fsck 参数 文件系统分区 常用参数： -t 指定文件系统类型 -a 自动修复e2fsck 专用于修复ext系列的文件系统 格式： e2fsck 参数 文件系统分区 常用参数： -f 强制检查 -p 自动修复mke2fs 专门管理ext系列的文件系统 格式： mke2fs

= number of Heads x track (cylinder) x number of sectors per sector X number of bytes per sector(6) Information record can be expressed as: xx track (cylinder), XX Head, XX sector2. HDD partition and Mount under Linux2.1 Everything is in the form of a documentIn Linux, all the devices are in the form of files, including hard drives.The device file path in the/dev path. For example, there is a hard disk SDA

per process=47707.72kb/secmin Xfer=2097152.00Kbchildren See throughput for 1Mixed workload =50807.69kb/Secparent sees throughput for 1Mixed workload =50806.24kb/secmin throughput per process=50807.69kb/sec Max throughput per process=50807.69kb/Secavg throughput per process=50807.69kb/secmin Xfer=2097152.00Kbchildren See throughput for 1Random writers =45131.93kb/Secparent sees throughput for 1Random writers =43955.32kb/secmin throughput per process=45131.93kb/sec Max throughput per process=4513

the storage.9. Use of the experience.In the process of use does not seem so smooth, or record the experience of the process used to give Yimeimei reference. There are two main points.1. When scanning a deep scan of the NTFS partition (or other) you need, there is no need to wait for a full scan to save time.2. If the scanned partition press p or enter after entering into the following terminal screen, do not hit Enter to choose Quit, you can tap the keyboard Q back to the previous partition Sel

: disklocal time is: Wed Nov 8 16:10:00 2017 Cstsmart support was: Unavailable-device lacks smart capability.=== START of READ Smart DATA Section ===error Counte R Logging not Supporteddevice does not support self Test logging#加-C parameter[Email protected] ~]# smartctl-x/dev/sdasmartctl 6.2 2017-02-27 r4394 [x86_64-linux-3.10.0-514.26.2.el7.x86_64] ( Local build) Copyright (C) 2002-13, Bruce Allen, Christian Franke, www.smartmont

I. Introduction of LVMLVM is shorthand for Logical Volume Manager (Logical Volume management), which is implemented by Heinz Mauelshagen on the Linux 2.4 kernel. LVM sets the partition of one or more hard disks logically, equivalent to a large hard disk to use, when the hard disk space is not enough to use, you can continue to add the partitions of other hard disks, so that the dynamic management of disk space, relative to the normal disk partition ha

Shing Email: [Email protected] Blog: http://blOg.csdn.net/qifengzou Date: 2015.01.16 00:33 Reprint please indicate the CSDN blog from "Chifeng" Before the kernel is upgraded, the system can start and use normally, and when the system kernel is upgraded, the system does not start normally, this may be caused by the incompatible hard drive. can nowthroughEnter the old systemFollowThe following steps step by step to troubleshoot the cause:①, query hard disk control chip manufac

partition:Fdisk/dev/hdaNL #选择逻辑分区, if not, first create an extended partition and then add the logical partition (hard disk: up to four partitions p-p-p-p or P-P-P-E)6 #分区号 (starting from 5),/dev/hda6T 8e #分区类型8e表示LVM分区W #写入分区表Partprobe #重读分区表Mkfs–t Ext3/dev/hda6 #格式化Partx/dev/hda #查看当前硬盘的分区表及使用情况Second, the creation of PV, expansion vg,lvPvcreate/dev/hda6Vgdisplay #查看当前已经存在的VG信息, taking the existence of vg:volgroup00 as an exampleVgextend Volgroup00/dev/hda6 #扩展VolGroup00Lvdisplay #查看已经存在的LV信息

mounted disk directory: [Email protected] ~]# Mkdir/dataMount/DEV/SDC1 to directory/data: [Email protected] ~]# Mount/dev/sdc1/data[Email protected] ~]# df-hFilesystem Size used Avail use% mounted on/DEV/SDA1 20G 7.3G 12G 39%/Tmpfs 32G 72K 32G 1%/DEV/SHM/DEV/SDC1 50G 180M 47G 1%/dataTo set up a Linux system boot automatically mount disk: 1) View the disk UUID [Email protected] ~]# BLKID/DEV/SDC1/dev/sdc1:uuid= "0c43e879-0e8b-4633-aa7b-d3c5a0e10614" t

-s_291720268.png "title=" image 3.png "alt=" Wkiom1i1sz3xaopyaabanlbzpju039.png-wh_50 "/>There is an array of load drivers to do as above operationConfigure on the ubuntu10.041, in the process of installing the system, to be able to log on to the second console (Ctrl +)alt+f2(in the choice of language that step), in the shell Environment,to see the current disk first, the block needs to be turned into GPT mode:Fdisk-lfirst look at the actual name of the hard drive that needs to be converted, for

One: Eliminate the shellThere are three styles of ringtones: none, Visible,(1) To eliminate the shell alarm sound, is to press the TAB key is not the sound:Add a line to the/ETC/INPUTRC: (I tried it in RedHat9.0)Set Bell-style NoneSave and restart the system.II: Elimination of VI(1) Interim plansudo rmmod PCSPKRFor Debian/ubuntu users, just open your terminal and run the above command. For Centos/redhat/rhel/fedora Linux users, you need to log in as r

LVM Disk ManagementI. Introduction of LVMLVM is shorthand for Logical Volume Manager (Logical Volume management), which is implemented by Heinz Mauelshagen on the Linux 2.4 kernel. LVM sets the partition of one or more hard disks logically, equivalent to a large hard disk to use, when the hard disk space is not enough to use, you can continue to add the partitions of other hard disks, so that the dynamic management of disk space, relative to the norma

Linux can use the Hdparm tool to view the relevant information on the hard disk or the hard drive to speed, optimize, modify the relevant parameters of the hard disk settings. I mainly use this tool to test the speed of the hard disk. Hdparm (hard disk parameters) Function Description: Display and set the parameters of the hard disk. Grammar: The code is as follows: Hdparm [-cfghiiqttvyyz][-a 1>][-p][-p Parameter description: -a -a -C Sets