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In CentOS4.4, use mdadm to create Raid5 -- Linux Enterprise Application-Linux server application information. The following is a detailed description. I. Environment
1. The operating system is CentOS4.4, And the mdadm software is provided by the system. The version is 1.6.0-3.
2. hda is installed with four hard disks, sda, sdb, sdc, and sdd, which are RAID 5. sdd is hot backup.
2. Preparation
1. First, format the four SCSI hard disks. Input the co
Article Title: Add a hard disk to linuxvm. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.
Shut down the Virtual Machine and load a hard disk.
Fdisk-l found that the newly loaded hard disk is sdc, that is, the third hard disk.
Fdisk/dev/sdc
Device contains neither a vali
I haven't forgotten the operation for a long time. I have to practice it again to make my impression better.These operations are performed on the vmwarevm. First install RHEL5 on/dev/sda. After installation, four hard disks are added:/dev/sdb,/dev/sdc,/dev/sdd, And/dev/sde, first look at the disk situation: [root@www.linuxidc.com ~] # Fdisk-l Disk/dev/sda: 15.0 GB, 15032385536 bytes 255 heads, 63 sectors/track, 1827 cylinders Units = cylinders of 1606
Start End Blocks Id System/dev/sdb1 1 1 2610 20964793 + 5 Extended/dev/sdb5 1 2610 20964762 83 LinuxWarning: invalid flag 0x0000 of partition table 5 will be corrected by w (rite) Disk/dev/sdc: 42.9 GB, 42949672960 bytes255 heads, 63 sectors/track, 5221 cylindersUnits = c Ylinders of 16065*512 = 8225280 bytes www.2cto.com Device Boot Start End Blocks Id System/dev/sdc1 11 5221 41857357 + 5 Extended/dev/sdc4 1 10 80293 + 83 Linux 2), to the hard disk
following prompt is displayed: 4. select "Write change to disk ", the system starts partitioning and formatting. 5. after the installation is complete, run df-ah to view the file. The result is similar: the root directory size is 3.1 TB, which exceeds 2 TB. The subsequent installation of other software is the same as before.2. configure on ubuntu10.041. during system installation, when you can log on to the second console (Ctrl +) Alt + F2 (select the language), in the shell environment, first,
mechanism.
-O
Specifying features used during formatting
-O list-all: list all supported feature
Man btrfs-filesystem view more sub-commands
Mount-t btrfs/dev/sdbMOUNT_POINT mount the file system
Mount-o compress = {lzo | zlib} DEVICE MOUNT_POINT transparent compression mechanism
Btrfs filesystem resize ± VALUE MOUNT_POINT resize disk
Btrfs devices [subcommand] args manage disk devices
Btrfs-balance subcomand | args balanced data
Btrfs subvolume [subcomm
password of Oracle 10g ASM
3) install and configure the asm Software
1.: otn find the required installation package for the asm of the corresponding Kernel
2. Install the asm package as a root user:
Ps: kernel-debug kernel-PAE kernel-xen is the previous package required by asm. It can be obtained from the linux installation CD.
3. Hard Disk partitioning
[Root @ localhost temp] # fdisk-lDisk/dev/sda: 214.7 GB, 214748364800 bytes255 heads, 63 sectors/track, 26108 cylindersUnits = cylinders of
Article Title: Use the Smartmontools tool to check the hard disk status. Linux is a technology channel of the IT lab in China. Including desktop applications, Linux system management, kernel research, embedded systems, open source, and other basic classification installation is very simple:
Sudo aptitude install smartmontools
Then, you need to configure it. First, you need to edit/etc/default/smartmontools:
Remove the comments before start_smartd = yes, and then set the device you want
-d/dev/sdbSATA_VBOX_HARDDISK_VBd306dbe0-df3367e3 _[Root @ rac01 ~] #/Sbin/scsi_id-g-u-d/dev/sdcSATA_VBOX_HARDDISK_VB46dec7e0-192e8000 _[Root @ rac01 ~] #/Sbin/scsi_id-g-u-d/dev/sddSATA_VBOX_HARDDISK_VBce8c63bb-ac67a172 _[Root @ rac01 ~] #/Sbin/scsi_id-g-u-d/dev/sdeSATA_VBOX_HARDDISK_VB7437a3b7-95b199cd _3. The hard drive of/dev/sdb 4G is divided into two primary partitions, two GB for each partition, to achieve OCR information redundancy.[Root @ rac01 ~] # Fdisk/dev/sdb 4. Divide the hard drive
]192.168.8.42:3260,1 iqn.2016-04.com.chinasoft.san:1# iscsiadm-m node-t iqn.2016-04.com.chinasoft.san:1-P 192.168.8.42-llogging in to [IFA Ce:default, Target:iqn.2016-04.com.chinasoft.san:1, portal:192.168.8.42,3260] (multiple) Login to [Iface:default, Target:iqn.2016-04.com.chinasoft.san:1, portal:192.168.8.42,3260] successful.Verify that you can see the service-side device# fdisk-l/dev/sd[a-z]SDC partition on Device# Fdisk/dev/sdcdevice contains n
additional time wasted, and the application is very convenient, so that development enterprises unknowingly protect the development of product security.Suzhou is convinced that the main development of Information Technology Co., Ltd. is the source code encryption products, in code encryption, data protection, active encryption defense, content encryption anti-string change, network monitoring audit and so on has made a series of independent intellectual property Rights research achievements com
LVM command:PV (physical volume)VG (volume Group)LV (logical volume)Note: Enter PV/VG/LV and then press TAB two to see the relevant commands.PE: Physical expansionLE: Logical extensionNote: The default size for each PE is 4M.Through the case to understand the PV, VG, LV creation, mount, capacity expansion, shrinkage, and uninstall Delete related operations commands.Case 1: Manage SDB, SDC hard drives with LVM, create them as a volume group called VG0,
The most basic name for the serverTemporary change of name hostname NFSServerVi/etc/sysconfig/network Direct ModificationThe name behind the hostname=.Sed-i "s%localhost%serverfile%g"/etc/sysconfig/network Direct modificationIf the boot server is slow, you canAdd the modified computer name to the Vi/etc/hostsWhen writing an article, add the operating system versionUNAME-A Show Related informationHow to simulate a small diskDD If=/dev/zero OF=/DEV/SDC
July 23 software Distribution management artifact Secure Delivery Center Free Technology Exchange application, MyEclipse original manufacturers3. Delivery PackageYou can use SDC to manage two types of packages. First, on-demand delivery packages allow you to deliver secure marketplace directories or enforce security policies on existing eclipse-based IDE devices, eclipse-based IDE is externally acquired and installed separately using
intuitive, from RTL to Gtech Library to the factory process library compiled translation mapping and substitution, the integration needs to input is the clock constraint is the SDC file, SDC is the design and product use requirements of the decision.DFT consists of several types, scan chain is the most common one, this can be done together in a comprehensive step, can also be carried out after the synthesi
Cause: After formatting with fdisk partition, Mount Discovery reads only hundreds of MB of space, which is larger than 2T to use parted format to GPT partition. Solve:1. Use the fdisk-l command and LSBLK to view disk information (/DEV/SDC)2. Installing parted# Yum Install parted3. Partitioning① You can enter p to print disk information, view the partition, and find the start and end locations# PARTED/DEV/SDC
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