Q4OS Forum

Rademes

Member

From: Latvia

Registered: 2015-12-13

Posts: 636

[Solved] Can not unmount removable devices.

Good day!
I have copied many files from my USB Hard drive to my USB Flash drive using Krusader. But after finishing, I was unable to unmount them. The system returned errors as seen in attachments.
But why? I have already finished copying 5 minutes ago and closed Krusader!

Last edited by Rademes (2021-01-04 14:58)

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Attachments:
Can_not_unmount.png, Size: 41.36 KiB, Downloads: 302
Target_Busy.png, Size: 15 KiB, Downloads: 325

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Before asking for help please read this topic: https://www.q4os.org/forum/viewtopic.php?id=3502   If you have problems with WiFi network, try to install the Network Manager using Q4OS Software Centre.

hchiper

Member

From: Belgium

Registered: 2020-07-28

Posts: 400

Re: [Solved] Can not unmount removable devices.

Maybe something special because sdb1 is a UDisk2?
Do this link and this link help?

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Q4OS machines: [Samsung R519 - Pentium T4200 2.0 GHz - 4 GB RAM - 500 GB SSD] & [Sony Vaio - Pentium P6000 1.87 GHz - 8 GB RAM - 500 GB SSD]

q4osteam

Q4OS Team

Registered: 2015-12-06

Posts: 4,259

Website

Re: [Solved] Can not unmount removable devices.

You can use  "fuser" , alternatively "lsof", commands to check which process blocks unmounting, see also https://unix.stackexchange.com/question … -on-umount

fuser has a -k option which will send a signal (default: SIGKILL) to each process using the mount. This is a rather forceful way to stop the mount from being busy. (And of course, be careful of what you SIGKILL!)

umount has an -l option to perform a lazy unmount. The mount will be removed from the filesystem namespace, but it stays mounted, so programs accessing it can continue to do so. When the last program accessing it exits, the unmount will actually occur.