Examination Failed(Cannot unmount disk) Hatası

I – How To Solve “Examination Failed(Cannot unmount disk) Error” With Unmounting Volume With Qumount

II – 2.th Way To Unmount Volume Manually via SSH

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I – How To Solve “Examination Failed(Cannot unmount disk) Error” With Unmounting Volume With Qumount

If you got this error Message;

Examination failed(Cannot unmount disk) (1)

But Qnap returns with this error;

Level:  Error

[RAID5 Disk Volume: Drive 1 2 3] Examination failed(Cannot unmount disk).

Examination failed(Cannot unmount disk) (2)

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To Solve İssue, Install Qumount QPKG, Unmount NAS, and start file system check!

What is Qumount?

Qumount is a package to log and workaround the issue where filesystem can not unmount.

For example:

  1. Some process keeps filesystem in use and cause filesystem check failed

  2. Some process keeps filesystem in use and cause “filesystem not clean” after reboot

 

How to get the qpkg:

http://download.qnap.com/Storage/tsd/utility/Qumount_0.2.zip

 

How to use:

1. Install in the App Center

2. Reboot NAS or do filesystem check

3. If there was any volume fail to unmount, there will be a log file umountxxxxxxx.log in the Public folder. You can use this log to find the process which locks volume

4. If there was any volume fail to unmount, the package will try to kill the process and unmount again. Therefore customer should not see error message in system logs after installing this qpkg.

 

Example log file:

umount_cachedev3_2015-12-16_13.21.54.log

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II – 2.th Way To Unmount Volume Manually via SSH

You can unmount volume manually, and start check process;

For Old Firmware (3.8.0 – 4.0.5)

/etc/init.d/services.sh stop
/etc/init.d/opentftp.sh stop
/etc/init.d/Qthttpd.sh stop
umount /dev/md0
e2fsck -f -v -C 0 /dev/md0
mount /dev/md0
reboot

http://dev.mensfeld.pl/2013/08/qnap-nas-file-system-not-clean-examination-failed-cannot-unmount-disk/

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For New Firmware (4.1.0 and later) (64 Bit)
/etc/init.d/services.sh stop
/etc/init.d/opentftp.sh stop
/etc/init.d/Qthttpd.sh stop
umount /dev/mapper/cachedev1
e2fsck_64 -f -v -C 0 /dev/mapper/cachedev1
mount -t ext4 /dev/mapper/cachedev1 /share/CACHEDEV1_DATA
reboot
https://forum.qnap.com/viewtopic.php?t=123461

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For NewFirmware (4.1.0 and later) (32 Bit)
/etc/init.d/services.sh stop
/etc/init.d/opentftp.sh stop
/etc/init.d/Qthttpd.sh stop
/etc/init.d/rsnap.sh stop
umount /dev/mapper/cachedev1
e2fsck -f -v -C 0 /dev/mapper/cachedev1

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