Linux RAID5 volumes and LVM logical volumes

LinuxRAID5volumes andLVMlogical volumes Add Disk

Add 3 hard drives, because building RAID5 volumes requires at least 3 drives

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to restart, Linux to identify newly added hard drives

# reboot

View all hard disk devices and information in the system

[Email protected] ~]# fdisk-l

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Planning Disks

planning sdb:

[Email protected] ~]# Fdisk/dev/sdb

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change Partition to FD (RAID volume )

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Planning for SDC is the same as planning SDB

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planning for SDD is the same operation

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installationMdadmPackage

Create RAID5 , need to install Mdadm Package

[Email protected] ~]# mount/dev/cdrom/mnt/cdrom/

Mount:block device/dev/sr0 iswrite-protected, mounting read-only

[Email protected] ~]# cd/mnt/cdrom/packages/

[Email protected]]# ls mdadm*

mdadm-3.2.5-4.el6.x86_64.rpm

[Email protected]]# rpm-ivh mdadm-3.2.5-4.el6.x86_64.rpm

Warning:mdadm-3.2.5-4.el6.x86_64.rpm:header V3 rsa/sha256 Signature, key ID Fd431d51:nokey

Preparing ... ###########################################[100%]

Package mdadm-3.2.5-4.el6.x86_64 is already installed

CreateLvmLogical Volumes

-C,--create: Create a new array

-L,--level=: sets the RAID level. this is RAID5

-N,--raid-devices=: Specifies the number of available device in the array , here is 3, which represents 3 hard Drives

Sd[bcd]1, the whole meaning of sdb1,sdc1,sdd1 represents 3 partitions

[Email protected]]# mdadm-c/dev/md5-l5-n3/dev/sd[bcd]1

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Create PV Physical volume, converting/DEV/MD5 to physical volume

[[Email protected] ~] #pvcreate/dev/md5

Physical volume "/DEV/MD5" successfully created

Create VG Volume Group, /DEV/MD5 created as a volume group, named VG

[[Email protected] ~] #vgcreate vg/dev/md5

Volume Group "VG" successfullycreated

View System Volume Group information

[[Email protected] ~] #vgdisplay

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Create LV Logical Volume

in a volume group Create a logical volume named LV in VG with a capacity size of 39GB

[[Email protected] ~] #lvcreate-L 39g-n LV VG

Logical volume "LV" created

format Mail logical Volume , file system for EXT4

[Email protected] ~]# mkfs-t EXT4/DEV/VG/LV

CreateRAID5

Create a directory under the root directory with the name RAID5

[Email protected] ~]# MKDIR/RAID5

mount a logical volume under /raid5

[Email protected] ~]# mount/dev/vg/lv/raid5/

Check your hard drive usage to see /RAID5

[Email protected] ~]# DF-HT

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Edit the configuration file of the system mount directory to enable automatic mount

[Email protected] ~]# Vi/etc/fstab

Last line add

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Create the directory AAA under /RAID5, Create a successful, description RAID5 volume to complete the creation.

[Email protected] ~]# CD/RAID5

[[email protected] RAID5] #mkdir AAA

[[email protected] RAID5] #ll

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