centos下ext4無法使用超過16T磁碟的解決辦法

centos下ext4無法使用超過16T磁碟的解決辦法
系統內容：Centos6.7 x86_64 己updte
磁碟：12*4T raid5 +hot
說明：作業系統與歸檔都使用raid5

一、查看分區 【fdisk -l】
[root@localhost sysadmin]# fdisk -l
WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted.
Disk /dev/sda: 40000.0 GB, 39999997214720 bytes
255 heads, 63 sectors/track, 4863055 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
Device Boot Start End Blocks Id System
/dev/sda1 1 267350 2147483647+ ee GPT說明：此時檔案系統己經超過16T，OS預設將其轉換成了GPT格式的，所以使用fdisk無法查看到準確的分區資訊。二、使用parted 查看分區資訊[root@localhost sysadmin]# parted
GNU Parted 2.1
Using /dev/sda
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) p
Model: LSI AOC-USAS2LP-H8iR (scsi)
Disk /dev/sda: 40.0TB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Number Start End Size File system Name Flags
1 1049kB 525MB 524MB ext4
2 525MB 263GB 262GB ext4
3 263GB 284GB 21.0GB ext4
4 284GB 288GB 4295MB linux-swap(v1)將餘下的空間都分為/archive 作為歸檔的根目錄(parted) mkpart /archive 288G -1
(parted) p
(parted) p
Model: LSI AOC-USAS2LP-H8iR (scsi)
Disk /dev/sda: 40.0TB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Number Start End Size File system Name Flags
1 1049kB 525MB 524MB ext4
2 525MB 263GB 262GB ext4
3 263GB 284GB 21.0GB ext4
4 284GB 288GB 4295MB linux-swap(v1)
5 288GB 40.0TB 39.7TB /archive(parted)q三、查看分區
[root@localhost ~]# fdisk /dev/sda
sda sda1 sda2 sda3 sda4 sda5[root@localhost ~]#說明：此時己經找到新的分區【sda5】
四、修改/etc/mke2fd.conf
shell#vim /etc/mke2fs.conf
[fs_types]
ext3 = {
features = has_journal
}
ext4 = {
features = has_journal,extent,huge_file,flex_bg,uninit_bg,dir_nlink,extra_isize
auto_64-bit_support = 1 #添加這一行
inode_size = 256
}五、下載e2fsprogs-1.42.13.tar.gzshell#wget -c http://jaist.dl.sourceforge.net/project/e2fsprogs/e2fsprogs/v1.42.13/e2fsprogs-1.42.13.tar.gz[root@localhost e2fsprogs-1.42.13]# pwd
/home/sysadmin/e2fsprogs-1.42.13
[root@localhost e2fsprogs-1.42.13]# cd build/
[root@localhost build]# ../configure
....
[root@localhost build]# make && make install六、格式化分區[root@localhost ~]# mke2fs -O 64bit,has_journal,extents,huge_file,flex_bg,uninit_bg,dir_nlink,extra_isize -i 2048 /dev/sda5
[root@localhost build]# blkid
/dev/sda1: UUID="908a3c8e-6d6a-4e01-8cad-2094ea99751f" TYPE="ext4"
/dev/sda3: UUID="b533714f-4cb9-4394-907d-8d1ead424c85" TYPE="ext4"
/dev/sda2: UUID="0a0ec20e-b50b-4d89-9fa6-65602e4e8a3d" TYPE="ext4"
/dev/sda4: TYPE="swap" UUID="b8e89719-670f-4b26-bbf3-86d13a1f935e"
/dev/sda5: UUID="3b5789ee-94c2-4296-bd99-5669200d826a" TYPE="ext4"mke2fs格式說明：-b<區塊大小>：指定區塊大小，單位為位元組；
-c；檢查是否有損壞的區塊；
-f<不連續區段大小>：指定不連續區段的大小，單位為位元組；
-F：不管指定的裝置為何，強制執行mke2fs；
-i<位元組>：指定"位元組/inode"的比例；
-N：指定要建立的inode數目；
-l<檔案>：從指定的檔案中，讀取檔案西中損壞區塊的資訊；
-L<標籤>：設定檔案系統的標籤名稱；
-m<百分比值>：指定給管理員保留區塊的比例，預設為5%；
-M：記錄最後一次掛入的目錄； -q：執行時不顯示任何資訊；
-r：指定要建立的ext2檔案系統版本；
-R=<區塊數>：設定磁碟陣列參數；
-S：僅寫入superblock與group descriptors，而不更改inode able inode bitmap以及block bitmap；
-v：執行時顯示詳細資料；
-V：顯示版本資訊。


七：將對應的分區掛載即可以使用
[root@localhost build]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda3 20G 2.4G 16G 14% /
tmpfs 7.8G 0 7.8G 0% /dev/shm
/dev/sda1 477M 80M 372M 18% /boot
/dev/sda2 241G 120M 228G 1% /home
/dev/sda5 36T 20K 34T 1% /archive
[root@localhost build]# df -i
Filesystem Inodes IUsed IFree IUse% Mounted on
/dev/sda3 1281120 91214 1189906 8% /
tmpfs 2040386 1 2040385 1% /dev/shm
/dev/sda1 128016 46 127970 1% /boot
/dev/sda2 16007168 1955 16005213 1% /home
/dev/sda5 4293781536 11 4293781525 1% /archive查看磁碟資訊[root@localhost build]# tune2fs -l /dev/sda5
tune2fs 1.42.13 (17-May-2015)
Filesystem volume name: <none>
Last mounted on: <not available>
Filesystem UUID: 3b5789ee-94c2-4296-bd99-5669200d826a
Filesystem magic number: 0xEF53
Filesystem revision #: 1 (dynamic)
Filesystem features: has_journal ext_attr dir_index filetype needs_recovery extent 64bit flex_bg sparse_super huge_file uninit_bg dir_nlink extra_isize
Filesystem flags: signed_directory_hash
Default mount options: user_xattr acl
Filesystem state: clean
Errors behavior: Continue
Filesystem OS type: Linux
Inode count: 4293781536
Block count: 9695327232
Reserved block count: 484766361
Free blocks: 9426221107
Free inodes: 4293781525
First block: 0
Block size: 4096
Fragment size: 4096
Group descriptor size: 64
Blocks per group: 32768
Fragments per group: 32768
Inodes per group: 14512
Inode blocks per group: 907
Flex block group size: 16
Filesystem created: Thu Oct 15 15:27:56 2015
Last mount time: Thu Oct 15 15:33:50 2015
Last write time: Thu Oct 15 15:33:50 2015
Mount count: 1
Maximum mount count: 33
Last checked: Thu Oct 15 15:27:56 2015
Check interval: 15552000 (6 months)
Next check after: Tue Apr 12 15:27:56 2016
Lifetime writes: 202 MB
Reserved blocks uid: 0 (user root)
Reserved blocks gid: 0 (group root)
First inode: 11
Inode size: 256
Required extra isize: 28
Desired extra isize: 28
Journal inode: 8
Default directory hash: half_md4
Directory Hash Seed: 56a5949a-5a49-4bc9-810d-9a9e2aa2109b
Journal backup: inode blocks