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Linux教程網 >> Linux基礎 >> 關於Linux >> linux ext4無法使用超過16T磁盤的解決辦法

linux ext4無法使用超過16T磁盤的解決辦法

日期:2017/3/1 12:23:29   编辑:關於Linux
系統環境:Centos6.7 x86_64 己updte 磁盤:12*4T raid5 +hot 說明:操作系統與歸檔都使用同一個raid5 應用環境:郵局系統【文件大小從1K到100K不等,除附件】 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:此時文件系統己經超過16T,OS默認將其轉換成了GPT格式的,所以使用fdisk無法查看到准確的分區信息。 二、使用parted 查看分區信息
[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)

三、將余下的空間都分為/archive 作為歸檔的根目錄
(parted)  mkpart /archive 288G -1
(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

四、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】 五、修改/etc/mke2fd.conf
#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
        }

六、下載e2fsprogs-1.42.13.tar.gz
[root@localhost ~]# wget -c http://jaist.dl.sourceforge.net/project/e2fsprogs/e2fsprogs/v1.42.8/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

七、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"

注: mke2fs格式說明: -b<區塊大小>:指定區塊大小,單位為字節; -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,單位為字節; -F:不管指定的設備為何,強制執行mke2fs; -i<字節>:指定"字節/inode"的比例; -N:指定要建立的inode數目; -l<文件>:從指定的文件中,讀取文件西中損壞區塊的信息; -L<標簽>:設置文件系統的標簽名稱; -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:執行時不顯示任何信息; -r:指定要建立的ext2文件系統版本; -R=<區塊數>:設置磁盤陣列參數; -S:僅寫入superblock與group descriptors,而不更改inode able inode bitmap以及block bitmap; -v:執行時顯示詳細信息; -V:顯示版本信息。 八、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

九、查看磁盤信息
[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

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