无法挂载新创建的逻辑卷

无法挂载新创建的逻辑卷

我尝试在现有卷组下创建逻辑卷,但由于错误而无法安装新 LV:“尝试打开时超级块中的幻数错误”:

[root@host-xxxx ~]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/vg_redhat601-LogVol00
                       29G  4.5G   23G  17% /
tmpfs                  16G   72K   16G   1% /dev/shm
/dev/vda5             190M   38M  143M  21% /boot
/dev/mapper/vg_redhat6-LogVol00
                       33G   48M   31G   1% /AMS

[root@host-xxxx ~]# vgdisplay vg_redhat6
  --- Volume group ---
  VG Name               vg_redhat6
  System ID             
  Format                lvm2
  Metadata Areas        2
  Metadata Sequence No  8
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                1
  Open LV               1
  Max PV                0
  Cur PV                2
  Act PV                2
  VG Size               70.96 GiB
  PE Size               4.00 MiB
  Total PE              18167
  Alloc PE / Size       8448 / 33.00 GiB
  Free  PE / Size       9719 / 37.96 GiB
  VG UUID               6YbIIs-OBJe-PGyV-Pwsl-VLGX-Jrf2-1SgJUZ

如上可以看到,vg_redhat6 VG下还有37.96G的可用空间。于是,我决定创建一个大小为15G的LV:

[root@host-xxxx ~]# lvcreate -L 15G -n LogVol01 vg_redhat6
  Logical volume "LogVol01" created.

[root@host-xxxx ~]# lvdisplay /dev/vg_redhat6/LogVol01
  --- Logical volume ---
  LV Path                /dev/vg_redhat6/LogVol01
  LV Name                LogVol01
  VG Name                vg_redhat6
  LV UUID                2FWKKM-mcbQ-RoCk-H2jc-0Jbt-nuha-KqYGtX
  LV Write Access        read/write
  LV Creation host, time host-135-249-45-28, 2016-04-08 14:44:00 +0530
  LV Status              available
  # open                 0
  LV Size                15.00 GiB
  Current LE             3840
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:3

当我在相关 LV 上运行 e2fsck 时,我看到以下错误:

[root@host-xxxx ~]# e2fsck /dev/vg_redhat6/LogVol01 e2fsck 1.41.12 (17-May-2010) e2fsck: Superblock invalid, trying backup blocks... e2fsck: Bad magic number in super-block while trying to open /dev/vg_redhat6/LogVol01

The superblock could not be read or does not describe a correct ext2 filesystem.  If the device is valid and it really contains an ext2 filesystem (and not swap or ufs or something else), then the superblock is corrupt, and you might try running e2fsck with an alternate superblock:
    e2fsck -b 8193 <device>

由于上述错误,我无法挂载这个新的 LV。我在谷歌上进行了一些搜索,但找不到任何有用的建议。您以前遇到过这个问题吗?您知道如何克服这个问题吗?

答案1

您已经创建了一个卷——一个可以存储信息的空白空间。你无法挂载它,因为挂载的是文件系统——信息结构。挂载使文件系统在目录中可见。

使用适当的mkfs命令在卷上创建文件系统,例如创建 ext4 文件系统(Linux 上的事实上的标准)运行(以 root 身份)mkfs.ext4 /dev/vg_redhat6/LogVol01

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