Free space of filesystem "/usr" returning incorrect size/number

Usage and Config
1

Hi,

I’m using this in some analysis:

free space of filesystem "/usr"

This is returning ‘2108022784’

However when checking on the command line:

# df -B1 /usr
Filesystem                 1B-blocks       Used  Available Use% Mounted on
/dev/mapper/system-usrlv 10418221056 8310198272 1586593792  84% /usr

When testing in QNA it also shows ‘2108022784’

# /opt/BESClient/bin/qna
Default masthead location, using /etc/opt/BESClient/actionsite.afxm
Q: free space of filesystem "/usr"
A: 2108022784
T: 4076

This is on SLES15(.5) using BESAgent-11.0.3.82-sle12.x86_64

2

Have you tried to plugin the relevance into a property and if so, is that showing accurate? What I am thinking is the context - you are running the qna tool under specific user but does that user has full rights to /usr to read its data accurately…? If ran as the agent which is root, then maybe that problem is not there…

If you have and it’s a problem with root too then open a support case cause this would look like a bug to me…

3

Thanks for the reply.

Both Agent and QNA running as root.
Also tested with qna as non root, but there are no strict permissions that would impact the output.

4

Just checking, do you have quotas configured, and so they apply to root?

5

Hi Jason, we are not using quotas

6

Ok, I’m out of ideas then. Please go ahead and open a Support ticket so the team can determine whether it’s a bug and look into a fix

7

I am following this up (very late, but for Google/forum search reasons).

I raised a ticket with support and they have advised that this is a feature, not a bug.

It seems to be specifically on EXT4 filesystems, (I didn’t bother to check ext2/ext3 though). xfs was fine.

The fix advised from support was to create a custom workaround.

It does not matter if there is reserved space with m0 or m50 (50% reserved space for root), it will still show the same output, which is not the same as df.

[root@server ~]# tune2fs -m50 /dev/mapper/lvgtest-lvext4
tune2fs 1.45.6 (20-Mar-2020)
Setting reserved blocks percentage to 50% (655360 blocks)
[root@server ~]# df -B1 /mnt/ext4 /mnt/ext4_m0
Filesystem                     1B-blocks  Used  Available Use% Mounted on
/dev/mapper/lvgtest-lvext4    5196382208 24576 2495225856   1% /mnt/ext4
/dev/mapper/lvgtest-lvext4_m0 5196382208 24576 5179580416   1% /mnt/ext4_m0
[root@server ~]# /opt/BESClient/bin/qna
Default masthead location, using /etc/opt/BESClient/actionsite.afxm
Q: free space of filesystem "/mnt/ext4"
A: 5196357632
T: 4049

Q: free space of filesystem "/mnt/ext4_m0"
A: 5196357632
T: 1261

Q:

:slight_smile: