磁盘管理 - parted、resize2fs、e2fsck缩减分区

admin 2020-06-20 PM 183℃ 0条

非必要不建议缩减分区,避免数据丢失。


[root@kvm ~]# umount /data

[root@kvm ~]# parted /dev/sdc

GNU Parted 3.1

Using /dev/sdc

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

(parted) p

Model: VMware, VMware Virtual S (scsi)

Disk /dev/sdc: 21.5GB

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

Partition Table: gpt

Disk Flags:


Number  Start   End     Size    File system  Name  Flags

 1      1049kB  16.0GB  16.0GB  ext4


(parted) resizepart 1 10G

Warning: Shrinking a partition can cause data loss, are you sure you want to continue?

Yes/No? y

(parted)p

Model: VMware, VMware Virtual S (scsi)

Disk /dev/sdc: 21.5GB

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

Partition Table: gpt

Disk Flags:


Number  Start   End     Size    File system  Name  Flags

 1      1049kB  10.0GB  9999MB  ext4


(parted) quit

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


[root@kvm ~]# e2fsck -f /dev/sdc1

e2fsck 1.42.9 (28-Dec-2013)

The filesystem size (according to the superblock) is 3905994 blocks

The physical size of the device is 2441150 blocks

Either the superblock or the partition table is likely to be corrupt!


原文件系统/dev/sdc1大小与新的物理分区/dev/sdc1大小不一致,比物理分区/dev/sdc1大小更大,所以存在报错。

解决办法:将原来分区大小恢复,先e2fsck、resiz2fs缩小文件系统,再使用parted 中resizpart调整分区大小,最后resize2fs 、e2fsck,再执行mount挂载。


1、恢复原来分区大小

[root@kvm ~]# parted /dev/sdc

GNU Parted 3.1

Using /dev/sdc

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

(parted) p

Model: VMware, VMware Virtual S (scsi)

Disk /dev/sdc: 21.5GB

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

Partition Table: gpt

Disk Flags:


Number  Start   End     Size    File system  Name  Flags

 1      1049kB  10.0GB  9999MB  ext4


(parted) rm1

(parted) rescue 1049kB 16G

searching for file systems... 3%        (time left 00:33)Information: A ext4 primary partition was found at 1049kB -> 16.0GB.  Do you want to add it to the partition table?

Yes/No/Cancel? y

(parted) p

Model: VMware, VMware Virtual S (scsi)

Disk /dev/sdc: 21.5GB

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

Partition Table: gpt

Disk Flags:


Number  Start   End     Size    File system  Name  Flags

 1      1049kB  16.0GB  16.0GB  ext4


(parted) quit

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


2、e2fsck、resiz2fs缩小文件系统

[root@kvm ~]#e2fsck -f /dev/sdc1

e2fsck 1.42.9 (28-Dec-2013)

Pass 1: Checking inodes, blocks, and sizes

Pass 2: Checking directory structure

Pass 3: Checking directory connectivity

Pass 4: Checking reference counts

Pass 5: Checking group summary information

/dev/sdc1: 12/602400 files (0.0% non-contiguous), 75948/2441150 blocks

[root@kvm ~]#resize2fs /dev/sdc1 5G

resize2fs 1.42.9 (28-Dec-2013)

Resizing the filesystem on /dev/sdc1 to 1310720 (4k) blocks.

The filesystem on /dev/sdc1 is now 1310720 blocks long.


3、使用parted 中resizpart调整分区大小

[root@kvm ~]# parted /dev/sdc

GNU Parted 3.1

Using /dev/sdc

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

(parted) p

Model: VMware, VMware Virtual S (scsi)

Disk /dev/sdc: 21.5GB

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

Partition Table: gpt

Disk Flags:


Number  Start   End     Size    File system  Name  Flags

 1      1049kB  10.0GB  9999MB  ext4


(parted) resizepart 1 5G

Warning: Shrinking a partition can cause data loss, are you sure you want to continue?

Yes/No? y

(parted) p

Model: VMware, VMware Virtual S (scsi)

Disk /dev/sdc: 21.5GB

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

Partition Table: gpt

Disk Flags:


Number  Start   End     Size    File system  Name  Flags

 1      1049kB  5000MB  4999MB  ext4


(parted) quit

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


4、通过resize2fs 、e2fsck调整检测文件系统

[root@kvm ~]# resize2fs /dev/sdc1

resize2fs 1.42.9 (28-Dec-2013)

Resizing the filesystem on /dev/sdc1 to 1220447 (4k) blocks.

The filesystem on /dev/sdc1 is now 1220447 blocks long.


[root@kvm ~]# e2fsck -f /dev/sdc1

e2fsck 1.42.9 (28-Dec-2013)

Pass 1: Checking inodes, blocks, and sizes

Pass 2: Checking directory structure

Pass 3: Checking directory connectivity

Pass 4: Checking reference counts

Pass 5: Checking group summary information

/dev/sdc1: 12/305216 files (0.0% non-contiguous), 56703/1220447 blocks

[root@kvm ~]# mount /dev/sdc1 /data

[root@kvm ~]# df

Filesystem                  1K-blocks    Used Available Use% Mounted on

devtmpfs                       919724       0    919724   0% /dev

tmpfs                          931520       0    931520   0% /dev/shm

tmpfs                          931520    9716    921804   2% /run

tmpfs                          931520       0    931520   0% /sys/fs/cgroup

/dev/mapper/centos-root       9349120 2135468   7213652  23% /

/dev/sda1                     1038336  191268    847068  19% /boot

tmpfs                          186304       0    186304   0% /run/user/0

/dev/sdc1                     4674044   19068   4394516   1% /data


标签: parted, resize2fs, e2fsck

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