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Near 100% disk usage, df and du show very different results, lsof not the answer
du vs. df differencedisk space keeps filling up on EC2 instance with no apperent files/directoriesVirtualbox disk in CentOS mount/format issue
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The issue is that my CentOS 5.8 machine is telling me that I am nearly out of disk space when I am pretty confident this is not the case. I've done a fair amount of researching on this issue and have been unable to find a solution.
'df -h' shows 210G used, 8.6G avail
'ncdu' shows 28.6G used (same for apparent size)
As you can see, this is nearly a 10x difference in the reported 'used' space. Knowing what is stored on this drive, I think 28.6G is closer to reality.
Looking at the output of 'lsof' there are very few lines with (deleted) at the end. Moreover, the largest size of any of these lines is 6190. Finally, I've rebooted the machine a number of times which, if I understand the other threads correctly, would resolve the issue of phantom files anyhow.
Here is a summary of the output from ncdu:
22.7GiB [##########] /opt
2.8GiB [# ] /usr
1.5GiB [ ] /var
812.4MiB [ ] /root
310.6MiB [ ] /home
194.3MiB [ ] /lib
156.4MiB [ ] /etc
36.5MiB [ ] /sbin
7.3MiB [ ] /bin
128.0KiB [ ] /tmp
20.0KiB [ ] /mnt
e 16.0KiB [ ] /lost+found
e 8.0KiB [ ] /srv
e 8.0KiB [ ] /selinux
8.0KiB [ ] /media
e 4.0KiB [ ] /backup
> 0.0 B [ ] /sys
> 0.0 B [ ] /proc
> 0.0 B [ ] /net
> 0.0 B [ ] /misc
> 0.0 B [ ] /dev
> 0.0 B [ ] /boot
0.0 B [ ] .autorelabel
0.0 B [ ] .autofsck
Output of 'df -Th':
Filesystem Type Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
ext3 221G 210G 8.6G 97% /
/dev/sda1 ext3 99M 25M 74M 25% /boot
tmpfs tmpfs 1.7G 0 1.7G 0% /dev/shm
This post mentions that outside of phantom files there are two other possible explanations:
- corrupt filesystem
- compromised machine
I'm looking for help on how to test the validity of these explanations. Obviously, explanation #2 is particularly concerning.
Thanks for your help!
centos5 disk-space-utilization lsof du df
edited Apr 13 '17 at 12:14
Community♦
1
asked Dec 11 '13 at 7:02
edwaaedwaa
192
add a comment |
The issue is that my CentOS 5.8 machine is telling me that I am nearly out of disk space when I am pretty confident this is not the case. I've done a fair amount of researching on this issue and have been unable to find a solution.
'df -h' shows 210G used, 8.6G avail
'ncdu' shows 28.6G used (same for apparent size)
As you can see, this is nearly a 10x difference in the reported 'used' space. Knowing what is stored on this drive, I think 28.6G is closer to reality.
Looking at the output of 'lsof' there are very few lines with (deleted) at the end. Moreover, the largest size of any of these lines is 6190. Finally, I've rebooted the machine a number of times which, if I understand the other threads correctly, would resolve the issue of phantom files anyhow.
Here is a summary of the output from ncdu:
22.7GiB [##########] /opt
2.8GiB [# ] /usr
1.5GiB [ ] /var
812.4MiB [ ] /root
310.6MiB [ ] /home
194.3MiB [ ] /lib
156.4MiB [ ] /etc
36.5MiB [ ] /sbin
7.3MiB [ ] /bin
128.0KiB [ ] /tmp
20.0KiB [ ] /mnt
e 16.0KiB [ ] /lost+found
e 8.0KiB [ ] /srv
e 8.0KiB [ ] /selinux
8.0KiB [ ] /media
e 4.0KiB [ ] /backup
> 0.0 B [ ] /sys
> 0.0 B [ ] /proc
> 0.0 B [ ] /net
> 0.0 B [ ] /misc
> 0.0 B [ ] /dev
> 0.0 B [ ] /boot
0.0 B [ ] .autorelabel
0.0 B [ ] .autofsck
Output of 'df -Th':
Filesystem Type Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
ext3 221G 210G 8.6G 97% /
/dev/sda1 ext3 99M 25M 74M 25% /boot
tmpfs tmpfs 1.7G 0 1.7G 0% /dev/shm
This post mentions that outside of phantom files there are two other possible explanations:
- corrupt filesystem
- compromised machine
I'm looking for help on how to test the validity of these explanations. Obviously, explanation #2 is particularly concerning.
Thanks for your help!
centos5 disk-space-utilization lsof du df
edited Apr 13 '17 at 12:14
Community♦
1
asked Dec 11 '13 at 7:02
edwaaedwaa
192
Possible duplicate of serverfault.com/questions/57098/du-vs-df-difference
– user130370
Dec 11 '13 at 8:32
Are you runningncduwithsudo?
– Babken Vardanyan
May 4 '16 at 10:28
This is surprising. Have you finally pinpointed the cause? Or at least some hint? What happened after that?
– Stéphane Gourichon
Mar 19 '17 at 16:07
And it's not a reserved block count issue? Check withdumpe2fs.
– Halfgaar
Jun 3 at 11:26
add a comment |
The issue is that my CentOS 5.8 machine is telling me that I am nearly out of disk space when I am pretty confident this is not the case. I've done a fair amount of researching on this issue and have been unable to find a solution.
'df -h' shows 210G used, 8.6G avail
'ncdu' shows 28.6G used (same for apparent size)
As you can see, this is nearly a 10x difference in the reported 'used' space. Knowing what is stored on this drive, I think 28.6G is closer to reality.
Looking at the output of 'lsof' there are very few lines with (deleted) at the end. Moreover, the largest size of any of these lines is 6190. Finally, I've rebooted the machine a number of times which, if I understand the other threads correctly, would resolve the issue of phantom files anyhow.
Here is a summary of the output from ncdu:
22.7GiB [##########] /opt
2.8GiB [# ] /usr
1.5GiB [ ] /var
812.4MiB [ ] /root
310.6MiB [ ] /home
194.3MiB [ ] /lib
156.4MiB [ ] /etc
36.5MiB [ ] /sbin
7.3MiB [ ] /bin
128.0KiB [ ] /tmp
20.0KiB [ ] /mnt
e 16.0KiB [ ] /lost+found
e 8.0KiB [ ] /srv
e 8.0KiB [ ] /selinux
8.0KiB [ ] /media
e 4.0KiB [ ] /backup
> 0.0 B [ ] /sys
> 0.0 B [ ] /proc
> 0.0 B [ ] /net
> 0.0 B [ ] /misc
> 0.0 B [ ] /dev
> 0.0 B [ ] /boot
0.0 B [ ] .autorelabel
0.0 B [ ] .autofsck
Output of 'df -Th':
Filesystem Type Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
ext3 221G 210G 8.6G 97% /
/dev/sda1 ext3 99M 25M 74M 25% /boot
tmpfs tmpfs 1.7G 0 1.7G 0% /dev/shm
This post mentions that outside of phantom files there are two other possible explanations:
- corrupt filesystem
- compromised machine
I'm looking for help on how to test the validity of these explanations. Obviously, explanation #2 is particularly concerning.
Thanks for your help!
centos5 disk-space-utilization lsof du df
edited Apr 13 '17 at 12:14
Community♦
1
asked Dec 11 '13 at 7:02
edwaaedwaa
192
The issue is that my CentOS 5.8 machine is telling me that I am nearly out of disk space when I am pretty confident this is not the case. I've done a fair amount of researching on this issue and have been unable to find a solution.
'df -h' shows 210G used, 8.6G avail
'ncdu' shows 28.6G used (same for apparent size)
As you can see, this is nearly a 10x difference in the reported 'used' space. Knowing what is stored on this drive, I think 28.6G is closer to reality.
Looking at the output of 'lsof' there are very few lines with (deleted) at the end. Moreover, the largest size of any of these lines is 6190. Finally, I've rebooted the machine a number of times which, if I understand the other threads correctly, would resolve the issue of phantom files anyhow.
Here is a summary of the output from ncdu:
22.7GiB [##########] /opt
2.8GiB [# ] /usr
1.5GiB [ ] /var
812.4MiB [ ] /root
310.6MiB [ ] /home
194.3MiB [ ] /lib
156.4MiB [ ] /etc
36.5MiB [ ] /sbin
7.3MiB [ ] /bin
128.0KiB [ ] /tmp
20.0KiB [ ] /mnt
e 16.0KiB [ ] /lost+found
e 8.0KiB [ ] /srv
e 8.0KiB [ ] /selinux
8.0KiB [ ] /media
e 4.0KiB [ ] /backup
> 0.0 B [ ] /sys
> 0.0 B [ ] /proc
> 0.0 B [ ] /net
> 0.0 B [ ] /misc
> 0.0 B [ ] /dev
> 0.0 B [ ] /boot
0.0 B [ ] .autorelabel
0.0 B [ ] .autofsck
Output of 'df -Th':
Filesystem Type Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
ext3 221G 210G 8.6G 97% /
/dev/sda1 ext3 99M 25M 74M 25% /boot
tmpfs tmpfs 1.7G 0 1.7G 0% /dev/shm
This post mentions that outside of phantom files there are two other possible explanations:
- corrupt filesystem
- compromised machine
I'm looking for help on how to test the validity of these explanations. Obviously, explanation #2 is particularly concerning.
Thanks for your help!
centos5 disk-space-utilization lsof du df
centos5 disk-space-utilization lsof du df
edited Apr 13 '17 at 12:14
Community♦
1
asked Dec 11 '13 at 7:02
edwaaedwaa
192
edited Apr 13 '17 at 12:14
Community♦
1
asked Dec 11 '13 at 7:02
edwaaedwaa
192
edited Apr 13 '17 at 12:14
Community♦
1
edited Apr 13 '17 at 12:14
Community♦
1
edited Apr 13 '17 at 12:14
Community♦
1
1
asked Dec 11 '13 at 7:02
edwaaedwaa
192
asked Dec 11 '13 at 7:02
edwaaedwaa
192
asked Dec 11 '13 at 7:02
edwaaedwaa
192
192
Possible duplicate of serverfault.com/questions/57098/du-vs-df-difference
– user130370
Dec 11 '13 at 8:32
Are you runningncduwithsudo?
– Babken Vardanyan
May 4 '16 at 10:28
This is surprising. Have you finally pinpointed the cause? Or at least some hint? What happened after that?
– Stéphane Gourichon
Mar 19 '17 at 16:07
And it's not a reserved block count issue? Check withdumpe2fs.
– Halfgaar
Jun 3 at 11:26
add a comment |
Possible duplicate of serverfault.com/questions/57098/du-vs-df-difference
– user130370
Dec 11 '13 at 8:32
Are you runningncduwithsudo?
– Babken Vardanyan
May 4 '16 at 10:28
This is surprising. Have you finally pinpointed the cause? Or at least some hint? What happened after that?
– Stéphane Gourichon
Mar 19 '17 at 16:07
And it's not a reserved block count issue? Check withdumpe2fs.
– Halfgaar
Jun 3 at 11:26
Possible duplicate of serverfault.com/questions/57098/du-vs-df-difference
– user130370
Dec 11 '13 at 8:32
Possible duplicate of serverfault.com/questions/57098/du-vs-df-difference
– user130370
Dec 11 '13 at 8:32
Are you running
ncdu with sudo?– Babken Vardanyan
May 4 '16 at 10:28
Are you running
ncdu with sudo?– Babken Vardanyan
May 4 '16 at 10:28
This is surprising. Have you finally pinpointed the cause? Or at least some hint? What happened after that?
– Stéphane Gourichon
Mar 19 '17 at 16:07
This is surprising. Have you finally pinpointed the cause? Or at least some hint? What happened after that?
– Stéphane Gourichon
Mar 19 '17 at 16:07
And it's not a reserved block count issue? Check with
dumpe2fs.– Halfgaar
Jun 3 at 11:26
And it's not a reserved block count issue? Check with
dumpe2fs.– Halfgaar
Jun 3 at 11:26
add a comment |
1 Answer
1
active
oldest
votes
You may try running e2fsck /dev/sdxy from a live Linux to check for FS corruption. The partition must be unmounted, that's why you need to boot up a live Linux.
answered Dec 11 '13 at 7:12
David LakatosDavid Lakatos
17310
add a comment |
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You may try running e2fsck /dev/sdxy from a live Linux to check for FS corruption. The partition must be unmounted, that's why you need to boot up a live Linux.
answered Dec 11 '13 at 7:12
David LakatosDavid Lakatos
17310
add a comment |
You may try running e2fsck /dev/sdxy from a live Linux to check for FS corruption. The partition must be unmounted, that's why you need to boot up a live Linux.
answered Dec 11 '13 at 7:12
David LakatosDavid Lakatos
17310
add a comment |
You may try running e2fsck /dev/sdxy from a live Linux to check for FS corruption. The partition must be unmounted, that's why you need to boot up a live Linux.
answered Dec 11 '13 at 7:12
David LakatosDavid Lakatos
17310
You may try running e2fsck /dev/sdxy from a live Linux to check for FS corruption. The partition must be unmounted, that's why you need to boot up a live Linux.
answered Dec 11 '13 at 7:12
David LakatosDavid Lakatos
17310
answered Dec 11 '13 at 7:12
David LakatosDavid Lakatos
17310
answered Dec 11 '13 at 7:12
David LakatosDavid Lakatos
17310
answered Dec 11 '13 at 7:12
David LakatosDavid Lakatos
17310
17310
add a comment |
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Possible duplicate of serverfault.com/questions/57098/du-vs-df-difference
– user130370
Dec 11 '13 at 8:32
Are you running
ncduwithsudo?– Babken Vardanyan
May 4 '16 at 10:28
This is surprising. Have you finally pinpointed the cause? Or at least some hint? What happened after that?
– Stéphane Gourichon
Mar 19 '17 at 16:07
And it's not a reserved block count issue? Check with
dumpe2fs.– Halfgaar
Jun 3 at 11:26