RHEL6.5 配置 RAID5下的 LVM卷
时间:2014-09-18 22:57 来源:linux.it.net.cn 作者:it
安装mdadm
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[root@leaus ~]# mount /dev/cdrom/mnt/cdrom/
mount: block device /dev/sr0 iswrite-protected, mounting read-only
[root@leaus ~]# cd /mnt/cdrom/Packages/
#使用rpm命令安装mdadm
[root@leaus Packages]# rpm -ivhmdadm-3.2.5-4.el6.x86_64.rpm
Preparing... ########################################### [100%]
package mdadm-3.2.5-4.el6.x86_64 is already installed
查看安装文件
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[root@leaus Packages]# rpm -qa mdadm
mdadm-3.2.5-4.el6.x86_64
[root@leaus Packages]# rpm -qc mdadm
/etc/cron.d/raid-check
/etc/sysconfig/raid-check
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[root@leaus ~]# fdisk -l
Disk /dev/sda: 42.9 GB, 42949672960 bytes
255 heads, 63 sectors/track, 5221 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0006c28a
Device Boot Start End Blocks Id System
/dev/sda1 * 1 131 1048576 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2 131 2742 20971520 83 Linux
/dev/sda3 2742 4047 10485760 83 Linux
/dev/sda4 4047 5222 9436160 5 Extended
/dev/sda5 4048 4309 2097152 82 Linux swap / Solaris
Disk /dev/sdb: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/sdc: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/sdd: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
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[root@leaus ~]# fdisk /dev/sdb
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel with disk identifier 0x27088e01.
Changes will remain in memory only, until you decide to write them.
After that, of course, the previous content won't be recoverable.
Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)
WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
switch off the mode (command 'c') and change display units to
sectors (command 'u').
Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4):
Value out of range.
Partition number (1-4): 1
First cylinder (1-2610, default 1):
Using default value 1
Last cylinder, +cylinders or +size{K,M,G} (1-2610, default 2610):
Using default value 2610
Command (m for help): t
Selected partition 1
Hex code (type L to list codes): fd
Changed system type of partition 1 to fd (Linux raid autodetect)
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
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mdadm --create /dev/md0 --level=5 --raid-devices=3 /dev/sdb /dev/sdc /dev/sdd
#察看磁盘分区 会发现多出来一个分区
Disk /dev/md0: 42.9 GB, 42915069952 bytes
2 heads, 4 sectors/track, 10477312 cylinders
Units = cylinders of 8 * 512 = 4096 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 524288 bytes / 1048576 bytes
Disk identifier: 0x00000000
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[root@leaus ~]# mkfs.ext4 /dev/md0
mke2fs 1.41.12 (17-May-2010)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=128 blocks, Stripe width=256 blocks
2621440 inodes, 10477312 blocks
523865 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=4294967296
320 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 28 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.
#把raid5卷加入启动
[root@leaus ~]# mdadm --detail --scan >> /etc/mdadm.conf
[root@leaus ~]# cat /proc/mdstat
#查看raid5完成
Personalities : [raid6] [raid5] [raid4]
md0 : active raid5 sdd[3] sdc[1] sdb[0]
41909248 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/2] [UU_]
[========>............] recovery = 44.6% (9351040/20954624) finish=2.2min speed=85136K/sec
unused devices: <none>
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#创建PV
[root@leaus /]# pvcreate /dev/md0
Physical volume "/dev/md0" successfully created
#创建VG
[root@leaus /]# vgcreate t1 /dev/md0
Volume group "t1" successfully created
#创建LV
[root@leaus /]# lvcreate -L 20G -n file1 t1
Logical volume "file1" created
#格式化LV
[root@leaus /]# mkfs.ext4 /dev/t1/file1
mke2fs 1.41.12 (17-May-2010)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=128 blocks, Stripe width=256 blocks
1310720 inodes, 5242880 blocks
262144 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=4294967296
160 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 24 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.
#挂载LV分区
[root@leaus /]# mount /dev/t1/file1 /root/data
[root@leaus /]# cd /root/data/
[root@leaus data]# ll
total 16
drwx------. 2 root root 16384 Aug 14 20:25 lost+found
#写入文件
[root@leaus /]# cd /root/data/
[root@leaus data]# touch 123.txt
[root@leaus data]# touch 456.txt
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[root@leaus ~]# cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4]
md0 : active raid5 sdb[1] sdc[3]
41909248 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/2] [_UU]
unused devices: <none>
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[root@leaus ~]# cd /root/data/
[root@leaus data]# ll
total 16
-rw-r--r--. 1 root root 0 Aug 14 20:34 123.txt
-rw-r--r--. 1 root root 0 Aug 14 20:34 456.txt
drwx------. 2 root root 16384 Aug 14 20:25 lost+found
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mdadm /dev/md0 --fail /dev/sdb1 让坏硬盘在raid中失效
mdadm /dev/md0 --remove /dev/sdb1 移除坏硬盘
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[root@leaus ~]# fdisk -l
Disk /dev/sda: 42.9 GB, 42949672960 bytes
255 heads, 63 sectors/track, 5221 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0006c28a
Device Boot Start End Blocks Id System
/dev/sda1 * 1 131 1048576 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2 131 2742 20971520 83 Linux
/dev/sda3 2742 4047 10485760 83 Linux
/dev/sda4 4047 5222 9436160 5 Extended
/dev/sda5 4048 4309 2097152 82 Linux swap / Solaris
Disk /dev/sdb: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xf770fa99
Device Boot Start End Blocks Id System
/dev/sdb1 1 2610 20964793+ fd Linux raid autodetect
Disk /dev/sdc: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xb1a21bfd
Device Boot Start End Blocks Id System
/dev/sdc1 1 2610 20964793+ fd Linux raid autodetect
Disk /dev/sdd: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/md0: 42.9 GB, 42915069952 bytes
2 heads, 4 sectors/track, 10477312 cylinders
Units = cylinders of 8 * 512 = 4096 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 524288 bytes / 1048576 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/t1-file1: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 524288 bytes / 1048576 bytes
Disk identifier: 0x00000000
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[root@leaus ~]#mdadm /dev/md0 --add /dev/sdd
[root@leaus ~]#cat /proc/mdstat
#察看RAID5的同步完成情况
Personalities : [raid6] [raid5] [raid4]
md0 : active raid5 sdd[4] sdb[1] sdc[3]
41909248 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/2] [_UU]
[=>...................] recovery = 8.0% (1682688/20954624) finish=2.2min speed=140224K/sec
unused devices: <none>
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[root@leaus ~]# mount /dev/mapper/t1-file1 /root/data/
[root@leaus ~]# cd /root/data
[root@leaus data]# ll
total 16
-rw-r--r--. 1 root root 0 Aug 14 20:34 123.txt
-rw-r--r--. 1 root root 0 Aug 14 20:34 456.txt
drwx------. 2 root root 16384 Aug 14 20:25 lost+found
(责任编辑：IT)
安装mdadm
查看安装文件
(责任编辑：IT) |