REHL8.2斷電導致 generating /run/initramfs/rdsosreport.txt 問題

REHL8.2 斷電導致 generating /run/initramfs/rdsosreport.txt 問題

開機就進入命令視窗，視窗提示資訊如下：

generating “/run/initramfs/rdsosreport.txt”
entering emergencymode. exit the shell to continue
type “journalctl” to view system logs.
you might want to save “/run/initramfs/rdsosreport.txt” to a usb stick or /boot after mounting them and attach it to a bug report。

解決方法：

xfs_repair /dev/mapper/centos-root -L

reboot

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參考文獻

If you're attempting to run  , getting the error message that suggests mounting the filesystem to replay the log, and after mounting still receiving the same error message, you may need to perform a forced repair (using the  -L flag with  xfs_repair).  This option should be a last resort.

For example, I'll use a case where I had a corrupt root partition on my CentOS 7 install. When attempting to mount the partition, I continually received the below error message:

mount: mount /dev/mapper/centos-root on /mnt/centos-root failed: Structure needs cleaning

Unfortunately, forcing a repair would involve zeroing out (destroying) the log before attempting a repair. When using this method, there is a potential of ending up with more corrupt data than initially anticipated; however, we can use the appropriate xfs tools to see what kind of damage may be caused before making any permanent changes.

Using   and  , you can create a metadata image of the affected partition and perform the forced repair on the image rather than the partition itself. The benefits of this is the ability to see the damage that comes with a forced repair before performing it on the partition.

To do this, you'll need a decent sized USB or external hard drive. Start by mounting the USB drive - my USB was located at  /dev/sdb1, yours may be named differently.

mkdir -p /mnt/usbmount /dev/sdb1 /mnt/usb

Once mounted, run  xfs_metadump to create a copy of the partition metadata to the USB - again, your affected partition may be different. In this case, I had a corrupt root partition located at  /dev/mapper/centos-root:

xfs_metadump /dev/mapper/centos-root /mnt/usb/centos-root.metadump

Next, you'll want to restore the metadata in to an image so that we can perform a repair and measure the damage.

xfs_mdrestore /mnt/usb/centos-root.metadump /mnt/usb/centos-root.img

I found that in rescue mode  xfs_mdrestore is not available, and instead you'll need to be in rescue mode of a live CentOS CD.

Finally, we can perform the repair on the image:

xfs_repair -L /mnt/usb/centos-root.img

After the repair has completed and you've assessed the output and potential damage, you can determine as to whether you'd like to perform the repair against the partition.

To run the repair against the partition, simply run:

xfs_repair -L /dev/mapper/centos-root

Don't forget to check the other partitions for corruption as well. After the repairs, reboot the system and you should be able to successfully boot.

Remember that the  -L flag should be used as a last resort where there are no other possible options to repair.

fsck -vcfy /dev/sda3　會清空資料。

在未掛載狀態下試一試這個命令：
# xfs_repair /dev/sdb1 /*後面跟目標驅動器路徑*/如果提示log什麼的有問題，則使用-L引數,這會重建log，然後再使用上面一條命令進行修復。
#xfs_repair -L /dev/sdb1

1 執行debugfs -w /dev/sdb    (/dev/sdb出現 該情況檔案所在的分割槽)　-w says that partition will be opened in read-write mode.

2 mount /dev/sdb /mnt/other  掛載到mnt/other 目錄下

3 執行 clri path/file    移除損壞檔案節點 注意path/file 值的是相對路徑 而不是/mnt/other/****

4 退出 debugfs 執行fsck -y /mnt/other   修復該分割槽

ext4檔案系統，使用命令  fsck.ext4 /dev/md0 修復，

如果是xfs檔案系統，使用命令 xfs_repair -L /dev/md0修復，

# mount /dev/sdb1 /disk2
mount: Structure needs cleaning

我用了下列的指令解決了. 雖然我不太清楚什麼東西導致它有問題 :
# xfs_repair -n /dev/sdb1

上面指令還不能完全解決

# xfs_check /dev/sdb1
ERROR: The filesystem has valuable metadata changes in a log which needs to
be replayed. Mount the filesystem to replay the log, and unmount it before
re-running xfs_check. If you are unable to mount the filesystem, then use
the xfs_repair -L option to destroy the log and attempt a repair.
Note that destroying the log may cause corruption — please attempt a mount
of the filesystem before doing this.

用 xfs_check 指令. 它建議我用 “xfs_repair -L ”
# xfs_repair -L /dev/sdb1

這樣弄玩之後. 在用 xfs_check 檢查一次
# xfs_check /dev/sdb1

就可以掛載了
# mount /dev/sdb1 /disk2