available space + Used space does not match allocated space

[Amit Manna_6]

HI
Why does the available space + Used space does not match allocated space for a filesystem

What is the rest of the portion used for?

[Vibhor Kumar Agarwal]

There is some space reserved for inode table, boot blocks, etc.

[Wessam Aly · Accepted solution]

Hi,

Sometimes, if you delete a very large file (a few gigabytes in size) or a file that is opened in memory, the filesystem psace will not be updated immediately.. it may sometimes take days to update the reported filesystem size.

a quick fix is to stop any processes on that filesystem..if that does not help, then stop processes and umount/mount the filesystem.

This will hopefully help.

[Kasper Hedensted]

Hi,

On a HFS filesystem you can specify a percentage of space that is not available to normal users.
The default is 10%

see tunefs(1M)

Cheers

[Siju Jose_1]

Hi

Check for the minfree part in the manpage of tunefs

Siju

[Mahesh Kumar Malik]

Hi Amit

Some space on disk is reserved for inode tables and boot blocks. Usually it is 10%,that is why available space + Used space does not match allocated space

Regards
Mahesh