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Author Topic: What process makes /dev/sda1 busy?  (Read 12872 times)

Offline Rahmat

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What process makes /dev/sda1 busy?
« on: September 23, 2012, 09:25:15 AM »
Hello:
I am just wondering, how to unmount /dev/sda1; the partition with the "tce/" folder.
How to find out, what process makes /dev/sda1 busy?
Thank you.
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Offline curaga

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Re: What process makes /dev/sda1 busy?
« Reply #1 on: September 23, 2012, 10:11:21 AM »
Not a process likely, but mounted extensions. If you need to umount that partition, you can load all extensions to ram with the copy2fs options.
The only barriers that can stop you are the ones you create yourself.

Offline bmarkus

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Re: What process makes /dev/sda1 busy?
« Reply #2 on: September 23, 2012, 10:32:30 AM »
Or you are making it busy yourself, e.g. your are using in the shell, etc.
Béla
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Offline Rich

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Re: What process makes /dev/sda1 busy?
« Reply #3 on: September 23, 2012, 10:40:30 AM »
Hi rms46
While your problem is probably, as curaga pointed out, mounted extensions, you will get that message anytime
you try to unmount a drive that is in use. Things that constitute in use include:
1. Editing a file on that drive.
2. Looking at a directory on that drive with a file manager.
3. Open a terminal and  cd  to a directory on that drive.
4. Another machine connected to a shared directory on that drive might also cause that message.

Offline Rahmat

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Re: What process makes /dev/sda1 busy?
« Reply #4 on: September 24, 2012, 08:47:34 PM »
Thank you very much for the clues!
I forgot that all those loop devices are accessing the mounted /dev/sda1 partition!
Again, thanks to all of you!
 
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Offline tinypoodle

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Re: What process makes /dev/sda1 busy?
« Reply #5 on: September 24, 2012, 11:31:44 PM »
"losetup" will show such ;)
"Software gets slower faster than hardware gets faster." Niklaus Wirth - A Plea for Lean Software (1995)

Offline Akane

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Re: What process makes /dev/sda1 busy?
« Reply #6 on: October 07, 2012, 07:26:25 PM »
Try
Code: [Select]
# fuser -m /mnt/sda1
to display the processes that using the resources.
Sorry for my terrible English.
Country: Japan
Interested in: HPC, low-level programming, embedded system and so on

Offline Rahmat

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Re: What process makes /dev/sda1 busy?
« Reply #7 on: October 10, 2012, 08:18:35 AM »
Try
Code: [Select]
# fuser -m /mnt/sda1to display the processes that using the resources.

Unfortunately, it does not work :(
Code: [Select]
tc@box:~$ fuser -m /mnt/sda1
tc@box:~$ sudo umount /dev/sda1
umount: can't umount /mnt/sda1: Device or resource busy
tc@box:~$
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Offline tinypoodle

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Re: What process makes /dev/sda1 busy?
« Reply #8 on: October 10, 2012, 10:44:38 AM »
Unfortunately for this case, the fuser applet of busybox is a bit limited in fuctionality.
Using the "-v" option of fuser from PSmisc might often instantly diagnose such issues.

Rather surprisingly, while there are a lot of busybox replacements I couldn't imagine of being very useful in repo, PSmisc does not appear to be there...
"Software gets slower faster than hardware gets faster." Niklaus Wirth - A Plea for Lean Software (1995)

Offline Akane

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Re: What process makes /dev/sda1 busy?
« Reply #9 on: October 11, 2012, 12:49:48 AM »
Hello, rms46.

Please run the comand as root.
(I wrote "#" as the prompt, not "$" :) )

Akane
Sorry for my terrible English.
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Interested in: HPC, low-level programming, embedded system and so on

Offline Rahmat

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Re: What process makes /dev/sda1 busy?
« Reply #10 on: October 11, 2012, 01:10:44 AM »
OK:
Code: [Select]
$ ssh -X -p 2222 tc@localhost
tc@localhost's password:
Last login: Thu Oct 11 14:57:34 2012 from 10.0.2.2
--------------------------------------------------------
PROXY OFF 11-Oct-2012
tc@box:~$ sudo su
root@box:~# fuser -m /mnt/sda1
root@box:~# umount /dev/sda1
umount: can't umount /mnt/sda1: Device or resource busy
root@box:~#
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Offline Akane

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Re: What process makes /dev/sda1 busy?
« Reply #11 on: October 11, 2012, 01:23:20 AM »
OK. I see. Thank you for running.

Well, run this(as root):
Code: [Select]
# fuser -mk /mnt/sda1

If you run above step and can't umount,
please try:
Code: [Select]
# fuser -mk /mnt/sda1 -KILL

Thank you.
Sorry for my terrible English.
Country: Japan
Interested in: HPC, low-level programming, embedded system and so on

Offline tinypoodle

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Re: What process makes /dev/sda1 busy?
« Reply #12 on: October 11, 2012, 08:50:49 AM »
"-KILL" is implied already by default.

Does
"losetup |grep sda1"
produce any output?
"Software gets slower faster than hardware gets faster." Niklaus Wirth - A Plea for Lean Software (1995)