parted分区方法

容量大于4T的硬盘(raid)安装CentOS始终是失败的，就算把硬盘转成GPT分区，再安装系统，系统是安装上了，但是启动不了。在安装的前一步还提示：you are using a gpt bootdisk on a non-EFI system。

CentOS6.2貌似支持了EFI了，iso镜像里面都有EFI文件夹，但是目前不知道如何启动EFI安装模式，有可能是主板自带的raid不支持？稍后用一块盘转GPT安装CentOS试试看。目前先转变思路，用一块盘安装系统，然后挂载raid大容量空间。

安装CentOS系统很简单，就不复述，主要是讲用parted进行大容量分区相关知识。

1、用fdisk -l查看分区情况，下面是我已经分区过的了

WARNING: GPT (GUID Partition Table) detected on ‘/dev/md126’! The util fdisk doesn’t support GPT. Use GNU Parted.

Disk /dev/md126: 3000.6 GB, 3000607178752 bytes
255 heads, 63 sectors/track, 364803 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 65536 bytes / 196608 bytes
Disk identifier: 0x00000000

Device Boot      Start         End      Blocks   Id  System
/dev/md126p1               1      267350  2147483647+  ee  GPT
Partition 1 does not start on physical sector boundary.

2、parted命令进入分区界面

[root@localhost ~]# parted /dev/md126
GNU Parted 2.1
使用 /dev/md126
Welcome to GNU Parted! Type ‘help’ to view a list of commands.
(parted)

输入help，查看parted命令帮助，主要帮助内容如下

(parted) help
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

上面分区要用到的命令如下：

print #查看分区情况

mklabel gpt #转成gpt分区，已经转过了

mkpart #创建一个新的分区，输入大小单位是MB（start 0  end -1表示使用整个磁盘分区）

quit #退出

(parted) print
Model: 未知 (unknown)
Disk /dev/md126: 3001GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt

Number  Start  End     Size    File system  Name  标志
1      197kB  3000GB  3000GB  ext4         date

3、创建文件系统并挂载分区，写入fstab

mkfs.ext4 /dev/md126p1

mkdir /data

mount –t /dev/md126p1 /data

vim /etc/fstab

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