☰

如何将 LVM 从只读挂载为读写

tag-icon • tag-icon linux lvm readonly
如何将 LVM 从只读挂载为读写

我有一个带有 LVM 的虚拟机。有时，当执行更新并且系统重新启动时，它会进入只读状态。这是一个问题，因为我每天都会执行备份。不幸的是，对我来说，由于我们的系统管理员休假，我被指派去解决这个问题。我有一个每天备份的快照文件夹，现在是只读的。我运行以下命令：

[root@aetest /]# mount -o remount /snapshots

执行此操作后，什么也没有发生。没有错误、加载或任何表明它有效的迹象。然后我移至快照文件夹并输入以下内容：

[root@aetest /]# touch mytest.dat

我得到这个：

touch: cannot touch "mytest.dat": Read-only file system

我可以尝试什么想法吗？迷失在这里。谢谢！

dmesg | tail 
[    7.148297] virbr0: port 1(virbr0-nic) entered listening state
[    7.148369] IPv6: ADDRCONF(NETDEV_UP): virbr0: link is not ready
[    7.228501] virbr0: port 1(virbr0-nic) entered disabled state
[50301439.170135] hrtimer: interrupt took 10774359 ns
[74288100.971099] fuse init (API version 7.22)
[74288166.623204] TCP: lp registered
[83201640.576424] CIFS VFS: Server SNAP2 has not responded in 120 seconds. Reconnecting...
[83201641.343342] CIFS VFS: Server SNAP2 has not responded in 120 seconds. Reconnecting...
[110561538.237685] blk_update_request: I/O error, dev fd0, sector 0
[110561538.261675] blk_update_request: I/O error, dev fd0, sector 0

/etc/fstab 中的内容粘贴在下面。我在这里没有看到任何问题..

/dev/mapper/rhel-root   /  xfs     defaults        1 1
UUID=b45d9891-8384-4f1b-9deb-ee885707fc24 /boot   xfs     defaults        1 2
/dev/mapper/rhel-swap   swap     swap    defaults        0 0
10.3.193.14:/prod_backups/q_uc4test_snapshots    /snapshots    nfs    ro,defaults    0 0
//SNAP2/UC4BDM  /opt/agent_library/finaid/snap2_uc4bdm  cifs    defaults,credentials=/etc/cifs.d/uc4finaid      0 0
//SNAP2/AdmAcct  /opt/agent_library/finaid/snap2_admacct  cifs    defaults,credentials=/etc/cifs.d/uc4finaid      0 0

[50301439.170135] hrtimer: interrupt took 10774359 ns
[74288100.971099] fuse init (API version 7.22)
[74288166.623204] TCP: lp registered
[83201640.576424] CIFS VFS: Server SNAP2 has not responded in 120 seconds. Reconnecting...
[83201641.343342] CIFS VFS: Server SNAP2 has not responded in 120 seconds. Reconnecting...
[110561538.237685] blk_update_request: I/O error, dev fd0, sector 0
[110561538.261675] blk_update_request: I/O error, dev fd0, sector 0

答案1

对于其他阅读本文并想要更清晰答案的人：

  • 是不是文件系统与设备那是只读的。

如果是文件系统，则根据注释：

mount -o remount,rw ${MOUNTPOINT_OR_DEVICE}

如果是设备，那么您需要：

lvchange --permission rw $VG/$LV

相关内容