新增存储用Parted分区并建LVM卷

一，Parted分区

1，parted分区

# parted /dev/sda

GNU Parted 2.1

使用 /dev/sda

Welcome to GNU Parted! Type 'help' to view a list of commands.

(parted) help                               首先看看帮助熟悉下

align-check TYPE N                        check partition N for TYPE(min|opt) alignment

check NUMBER                             do a simple check on the file system

cp [FROM-DEVICE] FROM-NUMBER TO-NUMBER   copy file system to another partition

help [COMMAND]                           print general help, or help on COMMAND

mklabel,mktable LABEL-TYPE               create a new disklabel (partition table)

mkfs NUMBER FS-TYPE                      make a FS-TYPE file system on partition NUMBER

mkpart PART-TYPE [FS-TYPE] START END     make a partition

mkpartfs PART-TYPE FS-TYPE START END     make a partition with a file system

move NUMBER START END                    move partition NUMBER

name NUMBER NAME                         name partition NUMBER as NAME

print [devices|free|list,all|NUMBER]     display the partition table, available devices, free space, all found partitions,

or a particular partition

quit                                     exit program

rescue START END                         rescue a lost partition near START and END

resize NUMBER START END                  resize partition NUMBER and its file system

rm NUMBER                                delete partition NUMBER

select DEVICE                            choose the device to edit

set NUMBER FLAG STATE                    change the FLAG on partition NUMBER

toggle [NUMBER [FLAG]]                   toggle the state of FLAG on partition NUMBER

unit UNIT                                set the default unit to UNIT

version                                  display the version number and copyright information of GNU Parted

(parted) mktable

新的磁盘标签类型？ gpt                     GPT就是GRUB分区表，如果是MBR，最大支持2T分区

(parted) p                                 打印一下信息这里的4398GB是磁盘容量

Model: DELL MD32xx (scsi)

Disk /dev/sda: 4398GB

Sector size (logical/physical): 512B/512B

Partition Table: gpt

Number  Start  End  Size  File system  Name  标志

(parted) mkpart                           #新建分区

分区名称？  []?                            #默认

文件系统类型？  [ext2]?                    #默认

起始点？ 0G   #起点

结束点？ 4398G                             #终点

(parted) p

Model: DELL MD32xx (scsi)

Disk /dev/sda: 4398GB

Sector size (logical/physical): 512B/512B

Partition Table: gpt

Number  Start   End     Size    File system  Name  标志

1      1049kB  4398GB  4398GB

(parted) toggle 1 lvm                     #标记成lvm

(parted) p

Model: DELL MD32xx (scsi)

Disk /dev/sda: 4398GB

Sector size (logical/physical): 512B/512B

Partition Table: gpt

Number  Start   End     Size    File system  Name  标志

1      1049kB  4398GB  4398GB                     lvm

(parted) quit

信息: You may need to update /etc/fstab.

2，同样的方法对sdb,sdc,sdd 分区

二，创建LVM，分三大步，分别建PV,VG,LVM

1，建PV

# pvcreate /dev/sda1 /dev/sdb1 /dev/sdc1 /dev/sdd1

Writing physical volume data to disk "/dev/sda1"

Physical volume "/dev/sda1" successfully created

Writing physical volume data to disk "/dev/sdb1"

Physical volume "/dev/sdb1" successfully created

Writing physical volume data to disk "/dev/sdc1"

Physical volume "/dev/sdc1" successfully created

Writing physical volume data to disk "/dev/sdd1"

Physical volume "/dev/sdd1" successfully created

2,建VG

# vgcreate md3200 /dev/sda1 /dev/sdb1 /dev/sdc1 /dev/sdd1

Volume group "md3200" successfully created

# lvcreate -n md3200lv1 -L 8T md3200

Logical volume "md3200lv1" created

You have new mail in /var/spool/mail/root

3,建LVM

#lvcreate -n md3200lv1 -L 8T md3200

Logical volume "md3200lv1" created

#lvcreate -n md3200lv2 -L 8T md3200

Logical volume "md3200lv2" created

三，格式化文件系统

# mkfs.ext4 /dev/md3200/md3200lv1

mke2fs 1.41.12 (17-May-2010)

文件系统标签=

操作系统:Linux

块大小=4096 (log=2)

分块大小=4096 (log=2)

Stride=0 blocks, Stripe width=0 blocks

536870912 inodes, 2147483648 blocks

107374182 blocks (5.00%) reserved for the super user

第一个数据块=0

Maximum filesystem blocks=4294967296

65536 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, 11239424, 20480000, 23887872, 71663616, 78675968,

102400000, 214990848, 512000000, 550731776, 644972544, 1934917632

正在写入inode表: 完成

Creating journal (32768 blocks): 完成

Writing superblocks and filesystem accounting information: 完成

This filesystem will be automatically checked every 33 mounts or

180 days, whichever comes first.  Use tune2fs -c or -i to override.

四，设置开机自动挂载

# mkdir md3200lv1  md3200lv2

# mount /dev/md3200/md3200lv1 /md3200lv1/

# ls /md3200lv1/

lost+found

#tail -n 2 /etc/fstab

/dev/md3200/md3200lv1 /md3200lv1                ext4    defaults                1 2

/dev/md3200/md3200lv2 /md3200lv2                ext4    defaults                1 2

五，重启验证

#reboot

# df -hl

文件系统              容量  已用  可用 已用%% 挂载点

/dev/mapper/md3200-md3200lv1

7.9T  175M  7.5T   1% /md3200lv1

/dev/mapper/md3200-md3200lv2

7.9T  175M  7.5T   1% /md3200lv2

六，最后顺便测试一下存储的读写速度

# dd if=/dev/zero of=./test bs=10M count=1000

记录了1000+0 的读入

记录了1000+0 的写出

10485760000字节(10 GB)已复制，8.83453 秒，1.2 GB/秒

# free -g

total       used       free     shared    buffers     cached

Mem:            62         11         51          0          0          9

-/+ buffers/cache:          1         61

Swap:            7          0          7

# dd if=./test of=./test1  bs=10M count=1000

记录了1000+0 的读入

记录了1000+0 的写出

10485760000字节(10 GB)已复制，12.3038 秒，852 MB/秒

# dd if=./test1 of=./test2  bs=10M count=1000

记录了1000+0 的读入

记录了1000+0 的写出

10485760000字节(10 GB)已复制，19.0357 秒，551 MB/秒

# dd if=./test2 of=./test3 bs=10M count=1000

记录了1000+0 的读入

记录了1000+0 的写出

10485760000字节(10 GB)已复制，18.641 秒，563 MB/秒

# free -g

total       used       free     shared    buffers     cached

Mem:            62         41         21          0          0         39

-/+ buffers/cache:          2         60

Swap:            7          0          7

# dd if=./test3 of=./test4 bs=10M count=1000

记录了1000+0 的读入

记录了1000+0 的写出

10485760000字节(10 GB)已复制，17.3797 秒，603 MB/秒

# dd if=./test4 of=./test5 bs=10M count=1000

记录了1000+0 的读入

记录了1000+0 的写出

10485760000字节(10 GB)已复制，22.8714 秒，458 MB/秒

# dd if=./test5 of=./test6 bs=10M count=1000

记录了1000+0 的读入

记录了1000+0 的写出

10485760000字节(10 GB)已复制，100.246 秒，105 MB/秒

因为内存是64G，故前面测试有缓存，最后105为实际读写速度。