parted /dev/vgca0

[root@erpbak ~]# parted /dev/vgca0
GNU Parted 1.8.1
Using /dev/vgca0
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) p                                                                


Model: Unknown (unknown)
Disk /dev/vgca0: 2222GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt


Number  Start  End  Size  File system  Name  Flags


(parted) help                                                             
  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]                           prints 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 partititon 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 [free|NUMBER|all]                  display the partition table, a partition, or all devices
  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                                  displays the current version of GNU Parted and copyright information
(parted) mklabel                                                          
Warning: The existing disk label on /dev/vgca0 will be destroyed and all data on this disk will be lost. Do you want to continue?
Yes/No? y                                                                 
New disk label type?  [gpt]?                                              
(parted)                                                                  
(parted) gpt                                                              
  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]                           prints 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 partititon 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 [free|NUMBER|all]                  display the partition table, a partition, or all devices
  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                                  displays the current version of GNU Parted and copyright information
(parted) unit                                                             
Unit?  [compact]? s                                                       
(parted) mkpart                                                           
Partition name?  []? 2                                                    
File system type?  [ext2]? ext3
Start? 2048                                                               
End? -1                                                                   
Warning: You requested a partition from 2048s to 4340711423s.             
The closest location we can manage is 2048s to 4340711390s.  Is this still acceptable to you?
Yes/No? y                                                                 
(parted) p                                                                


Model: Unknown (unknown)
Disk /dev/vgca0: 4340711423s
Sector size (logical/physical): 512B/512B
Partition Table: gpt


Number  Start  End          Size         File system  Name  Flags
 1      2048s  4340711390s  4340709343s               2          


(parted) q
Information: Don't forget to update /etc/fstab, if necessary.             


[root@erpbak ~]# ll /dev/vg*
crw------- 1 root root  10, 63 Jan  6  2014 /dev/vga_arbiter
brw-r----- 1 root disk 252,  0 Jan  5 21:55 /dev/vgca0
brw-r----- 1 root disk 252,  1 Jan  5 21:55 /dev/vgca0p1
crw-rw-r-- 1 root root 248,  0 Jan  5 21:28 /dev/vgc-fmm
crw-r--r-- 1 root root 247,  4 Jan  5 21:28 /dev/vgcmgmta-bb
crw-r--r-- 1 root root 247,  9 Jan  5 21:28 /dev/vgcmgmta-diags
crw-r--r-- 1 root root 247,  5 Jan  5 21:28 /dev/vgcmgmta-dieid
crw-r--r-- 1 root root 247, 11 Jan  5 21:28 /dev/vgcmgmta-oem_info
crw-r--r-- 1 root root 247,  3 Jan  5 21:28 /dev/vgcmgmta-pecounts
crw-r--r-- 1 root root 247,  8 Jan  5 21:28 /dev/vgcmgmta-vformat
[root@erpbak ~]# 

mkfs.ext3 /dev/vgca0p1

目的：在centos 5.4系统下，用parted功能分区12T的硬盘并格式化成ext4,12T共分为2个分区，一个7.5T,另一个4.5T.
在linux 下大磁盘的分区不能再采用fdisk了，MBR分区表只支持2T磁盘，所以大于2T的磁盘必须使用GPT分区表。下面说明下具体的步骤:
1.分为两个主分区

[root@localhost ~]# parted /dev/sdb # 使用parted来对GPT磁盘操作，进入交互式模式
GNU Parted 1.8.1 Using /dev/sdb Welcome to GNU Parted! Type ‘help’ to view a list of commands.
(parted) mklabel gpt           # 将MBR磁盘格式化为GPT
(parted) print                       #打印当前分区
(parted) mkpart primary 0 4.5TB                # 分一个4.5T的主分区
(parted) mkpart primary 4.5TB 12TB      # 分一个7.5T的主分区
(parted) print                         #打印当前分区
(parted) quit 退出
Information: Don’t forget to update /etc/fstab, if necessary.

2.然后格式化成ext4,需要安装包e4fsprogs.x86_64(yum install e4fsprogs.x86_64)即可。

[root@localhost ~]# mkfs.ext4 /dev/sdb1
[root@localhost ~]# mkfs.ext4 /dev/sdb2

3.接着用mount挂载分区

[root@localhost]# mount -t ext4 /dev/sdb1 /bk
[root@localhost]# mount -t ext4 /dev/sdb2 /mail
[root@localhost ~]# df -Th
Filesystem    Type    Size  Used Avail Use% Mounted on
/dev/sda6     ext3     39G  9.4G   28G  26% /
/dev/sda1     ext3    122M   13M  103M  12% /boot
none         tmpfs   1004M     0 1004M   0% /dev/shm
/dev/sdb1     ext4    4.1T   194M  3.9T  1% /bk
/dev/sdb2     ext4    6.8T   179M  6.4T  1% /mail

4.最后修改/etc/fstab，添加如下两行，让其开机自动挂载.

/dev/sdb1       /bk          ext4            defaults,noatime       1 2
/dev/sdb2      /mail       ext4           defaults,noatime         1 2