resize2fs:在试图打开超级块时，坏的魔法数字

我试图在CentOS7上调整逻辑卷的大小，但遇到以下错误:

resize2fs 1.42.9 (28-Dec-2013)
resize2fs: Bad magic number in super-block while trying to open /dev/mapper/centos-root
Couldn't find valid filesystem superblock.
我已经尝试添加一个新分区(使用fdisk)，并使用vgextend扩展卷组，然后调整大小。 对于使用lvextend的逻辑卷，Resize工作得很好，但是在resize2fs.

我还尝试删除一个现有分区(使用fdisk)并使用更大的结束块重新创建它，然后使用lvm pvresize调整物理卷的大小，然后使用lvm lvresize调整逻辑卷的大小。到目前为止，一切工作都很顺利。

一旦我尝试使用resize2fs，使用上述两种方法，我收到了完全相同的错误。

希望下面的一些内容能让你有所了解。

fdisk - l

[root@server~]# fdisk -l


Disk /dev/xvda: 32.2 GB, 32212254720 bytes, 62914560 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x0009323a


Device Boot      Start         End      Blocks   Id  System
/dev/xvda1   *        2048     1026047      512000   83  Linux
/dev/xvda2         1026048    41943039    20458496   8e  Linux LVM
/dev/xvda3        41943040    62914559    10485760   8e  Linux LVM


Disk /dev/mapper/centos-swap: 2147 MB, 2147483648 bytes, 4194304 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes




Disk /dev/mapper/centos-root: 29.5 GB, 29532094464 bytes, 57679872 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

pvdisplay

[root@server ~]# pvdisplay
--- Physical volume ---
PV Name               /dev/xvda2
VG Name               centos
PV Size               19.51 GiB / not usable 2.00 MiB
Allocatable           yes (but full)
PE Size               4.00 MiB
Total PE              4994
Free PE               0
Allocated PE          4994
PV UUID               7bJOPh-OUK0-dGAs-2yqL-CAsV-TZeL-HfYzCt


--- Physical volume ---
PV Name               /dev/xvda3
VG Name               centos
PV Size               10.00 GiB / not usable 4.00 MiB
Allocatable           yes (but full)
PE Size               4.00 MiB
Total PE              2559
Free PE               0
Allocated PE          2559
PV UUID               p0IClg-5mrh-5WlL-eJ1v-t6Tm-flVJ-gsJOK6

中

[root@server ~]# vgdisplay
--- Volume group ---
VG Name               centos
System ID
Format                lvm2
Metadata Areas        2
Metadata Sequence No  6
VG Access             read/write
VG Status             resizable
MAX LV                0
Cur LV                2
Open LV               2
Max PV                0
Cur PV                2
Act PV                2
VG Size               29.50 GiB
PE Size               4.00 MiB
Total PE              7553
Alloc PE / Size       7553 / 29.50 GiB
Free  PE / Size       0 / 0
VG UUID               FD7k1M-koJt-2veW-sizL-Srsq-Y6zt-GcCfz6

lvdisplay

[root@server ~]# lvdisplay
--- Logical volume ---
LV Path                /dev/centos/swap
LV Name                swap
VG Name                centos
LV UUID                KyokrR-NGsp-6jVA-P92S-QE3X-hvdp-WAeACd
LV Write Access        read/write
LV Creation host, time localhost, 2014-10-09 08:28:42 +0100
LV Status              available
# open                 2
LV Size                2.00 GiB
Current LE             512
Segments               1
Allocation             inherit
Read ahead sectors     auto
- currently set to     8192
Block device           253:0


--- Logical volume ---
LV Path                /dev/centos/root
LV Name                root
VG Name                centos
LV UUID                ugCOcT-sTDK-M8EV-3InM-hjIg-2nwS-KeAOnq
LV Write Access        read/write
LV Creation host, time localhost, 2014-10-09 08:28:42 +0100
LV Status              available
# open                 1
LV Size                27.50 GiB
Current LE             7041
Segments               2
Allocation             inherit
Read ahead sectors     auto
- currently set to     8192
Block device           253:1

我可能做了一些愚蠢的事情，所以任何帮助都会非常感激!

497581 次浏览
小开

我今天中午遇到了同样的问题，最终在这里找到了解决方案——> 试图重新大小2fs EB卷失败

我跳过了安装，因为分区已经被安装了。

显然，CentOS 7使用XFS作为默认文件系统，因此resize2fs将失败。

我看了一下/etc/fstab，你猜怎么着，XFS正盯着我的脸…希望这能有所帮助。

小开
最佳答案

经过一些尝试和错误之后……正如在可能的答案中提到的，它最终需要xfs_growfs而不是resize2fs。

CentOS 7,

fdisk /dev/xvda

创建新的主分区，设置类型为linux lvm。

n
p
3
t
8e
w

创建一个新的主卷，并将卷组扩展到新卷。

partprobe
pvcreate /dev/xvda3
vgextend /dev/centos /dev/xvda3

检查物理卷是否有剩余空间，用剩余空间扩展逻辑卷。

vgdisplay -v
lvextend -l+288 /dev/centos/root

最后执行在线调整逻辑卷大小，然后检查可用空间。

xfs_growfs /dev/centos/root
df -h
小开

CentOS7 + VM

我用:

  1. Gparted-live扩展卷
  2. pvresize -v /dev/sda2
  3. lvresize -r -l+100%FREE centos/root
小开 
How to resize root partition online :


1)  [root@oel7 ~]# df -h
Filesystem                         Size  Used Avail Use% Mounted on
/dev/mapper/root_vg-root           5.0G  4.5G  548M  90% /


2)


PV /dev/sda2   VG root_vg     lvm2 [6.00 GiB / 0    free]


as here it shows that there is no space left on root_vg volume group, so first i need to extend VG


3)
[root@oel7 ~]# vgextend root_vg /dev/sdb5


Volume group "root_vg" successfully extended


4)


[root@oel7 ~]# pvscan
PV /dev/sda2   VG root_vg     lvm2 [6.00 GiB / 0    free]
PV /dev/sdb5   VG root_vg     lvm2 [2.00 GiB / 2.00 GiB free]


5)  Now extend the logical volume


[root@oel7 ~]# lvextend -L +1G /dev/root_vg/root


Size of logical volume root_vg/root changed from 5.00 GiB (1280 extents) to 6.00 GiB (1536 extents).
Logical volume root successfully resized


3)  [root@oel7 ~]# resize2fs /dev/root_vg/root


resize2fs 1.42.9 (28-Dec-2013)
resize2fs: Bad magic number in super-block while trying to open /dev/root_vg  /root
Couldn't find valid filesystem superblock.


as root partition is not a ext* partiton so , you resize2fs will not work for you.


4)  to check the filesystem type of a partition
[root@oel7 ~]# df -Th
Filesystem                        Type      Size  Used Avail Use% Mounted on
/dev/mapper/root_vg-root          xfs       6.0G  4.5G  1.6G  75% /
devtmpfs                          devtmpfs  481M     0  481M   0% /dev
tmpfs                             tmpfs     491M   80K  491M   1% /dev/shm
tmpfs                             tmpfs     491M  7.1M  484M   2% /run
tmpfs                             tmpfs     491M     0  491M   0% /sys/fs  /cgroup
/dev/mapper/data_vg-home          xfs       3.5G  2.9G  620M  83% /home
/dev/sda1                         xfs       497M  132M  365M  27% /boot
/dev/mapper/data_vg01-data_lv001  ext3      4.0G  2.4G  1.5G  62% /sybase
/dev/mapper/data_vg02-backup_lv01 ext3      4.0G  806M  3.0G  22% /backup


above command shows that root is an xfs filesystem , so we are sure that we need to use xfs_growfs command to resize the partition.


6)  [root@oel7 ~]# xfs_growfs /dev/root_vg/root
meta-data=/dev/mapper/root_vg-root isize=256    agcount=4, agsize=327680 blks
=                       sectsz=512   attr=2, projid32bit=1
=                       crc=0        finobt=0
data     =                       bsize=4096   blocks=1310720, imaxpct=25
=                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=0
log      =internal               bsize=4096   blocks=2560, version=2
=                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
data blocks changed from 1310720 to 1572864


[root@oel7 ~]# df -Th


Filesystem                        Type      Size  Used Avail Use% Mounted on
/dev/mapper/root_vg-root          xfs       6.0G  4.5G  1.6G  75% /
小开

在Centos 7中，默认的文件系统是xfs。

xfs文件系统只支持扩展不支持减少。因此，如果您想要调整文件系统的大小，请使用xfs_growfs而不是resize2fs。

xfs_growfs /dev/root_vg/root

注意:对于ext4文件系统使用

resize2fs /dev/root_vg/root
小开

在Centos 7上，在回答resize2fs失败的原始问题时，尝试使用fsadm，如下:

fsadm resize /dev/the-device-name-returned-by-df

然后:

df

．.． 来确认大小的改变是否有效。

小开

在阅读了关于LVM和熟悉PV -> VG -> LV后，这对我来说是有效的:

0) #df -h

Filesystem               Size  Used Avail Use% Mounted on
devtmpfs                 1.9G     0  1.9G   0% /dev
tmpfs                    1.9G     0  1.9G   0% /dev/shm
tmpfs                    1.9G  824K  1.9G   1% /run
tmpfs                    1.9G     0  1.9G   0% /sys/fs/cgroup
/dev/mapper/fedora-root   15G  2.1G   13G  14% /
tmpfs                    1.9G     0  1.9G   0% /tmp
/dev/md126p1             976M  119M  790M  14% /boot
tmpfs                    388M     0  388M   0% /run/user/0

1) # VGS

  VG     #PV #LV #SN Attr   VSize   VFree
fedora   1   2   0 wz--n- 231.88g 212.96g

2) # vgdisplay

  --- Volume group ---
VG Name               fedora
System ID
Format                lvm2
Metadata Areas        1
Metadata Sequence No  3
VG Access             read/write
VG Status             resizable
MAX LV                0
Cur LV                2
Open LV               2
Max PV                0
Cur PV                1
Act PV                1
VG Size               231.88 GiB
PE Size               4.00 MiB
Total PE              59361
Alloc PE / Size       4844 / 18.92 GiB
Free  PE / Size       54517 / 212.96 GiB
VG UUID               9htamV-DveQ-Jiht-Yfth-OZp7-XUDC-tWh5Lv

3) # lvextend -l +100%FREE /dev/mapper/fedora-root

  Size of logical volume fedora/root changed from 15.00 GiB (3840 extents) to 227.96 GiB (58357 extents).
Logical volume fedora/root successfully resized.

4) # lvdisplay

5) #fd -h

6) # xfs_growfs /dev/mapper/fedora-root

meta-data=/dev/mapper/fedora-root isize=512    agcount=4, agsize=983040 blks
=                       sectsz=512   attr=2, projid32bit=1
=                       crc=1        finobt=1 spinodes=0 rmapbt=0
=                       reflink=0
data     =                       bsize=4096   blocks=3932160, imaxpct=25
=                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
log      =internal               bsize=4096   blocks=2560, version=2
=                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
data blocks changed from 3932160 to 59757568

7) #df -h

Filesystem               Size  Used Avail Use% Mounted on
devtmpfs                 1.9G     0  1.9G   0% /dev
tmpfs                    1.9G     0  1.9G   0% /dev/shm
tmpfs                    1.9G  828K  1.9G   1% /run
tmpfs                    1.9G     0  1.9G   0% /sys/fs/cgroup
/dev/mapper/fedora-root  228G  2.3G  226G   2% /
tmpfs                    1.9G     0  1.9G   0% /tmp
/dev/md126p1             976M  119M  790M  14% /boot
tmpfs                    388M     0  388M   0% /run/user/0

最好的问候,

小开

resize2fs命令不适用于所有文件系统。

请使用以下命令确认您的实例的文件系统。 enter image description here < / p >

请按照亚马逊官方文档中针对不同文件系统的步骤进行扩容。

https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/recognize-expanded-volume-linux.html

Centos默认的文件系统是xfs，使用下面的命令对xfs文件系统增加分区大小。

sudo xfs_growfs -d /

然后用df -h来检查。

小开

操作系统:rhel7

在gparted之后，# xfs_growfs /dev/mapper/rhel-root在一个生命系统上发挥了作用。

$ df -h
Filesystem             Size  Used Avail Use% Mounted on
/dev/mapper/rhel-root   47G   47G   20M 100% /
devtmpfs               1.9G     0  1.9G   0% /dev
tmpfs                  1.9G     0  1.9G   0% /dev/shm
tmpfs                  1.9G  9.3M  1.9G   1% /run
tmpfs                  1.9G     0  1.9G   0% /sys/fs/cgroup
/dev/sda1             1014M  205M  810M  21% /boot
tmpfs                  379M  8.0K  379M   1% /run/user/42
tmpfs                  379M     0  379M   0% /run/user/1000




# lvresize -l +100%FREE /dev/mapper/rhel-root
Size of logical volume rhel/root changed from <47.00 GiB (12031 extents) to <77.00 GiB (19711 extents).
Logical volume rhel/root successfully resized.




# xfs_growfs /dev/mapper/rhel-root
meta-data=/dev/mapper/rhel-root  isize=512    agcount=7, agsize=1900032 blks
=                       sectsz=512   attr=2, projid32bit=1
=                       crc=1        finobt=0 spinodes=0
data     =                       bsize=4096   blocks=12319744, imaxpct=25
=                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
log      =internal               bsize=4096   blocks=3711, version=2
=                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
data blocks changed from 12319744 to 20184064




# df -h
Filesystem             Size  Used Avail Use% Mounted on
/dev/mapper/rhel-root   77G   47G   31G  62% /
devtmpfs               1.9G     0  1.9G   0% /dev
tmpfs                  1.9G     0  1.9G   0% /dev/shm
tmpfs                  1.9G  9.3M  1.9G   1% /run
tmpfs                  1.9G     0  1.9G   0% /sys/fs/cgroup
/dev/sda1             1014M  205M  810M  21% /boot
tmpfs                  379M  8.0K  379M   1% /run/user/42
tmpfs                  379M     0  379M   0% /run/user/1000
小开

在centos和fedora上使用fsadm

fsadm resize /dev/vg_name/root
小开

调整已挂载卷的大小

sudo mount -t xfs /dev/sdf /opt/data/

Mount: /opt/data: /dev/nvme1n1 already mounted on /opt/data。

sudo xfs_growfs /opt/data/

小开

在我的情况下，我可以用这些命令来修复超级块的位置:

yum install gdisk
parted -l /dev/mapper/centos-root
growpart /dev/mapper/centos-root 1
xfs_growfs /

提交答案