charlie derr wrote:
On one of the machines that I oversee there is an issue with the df
output that I don't understand.
here's a part of the output from df -h
/dev/sda1 440G 420G 0 100% /backup
if i don't use the -h it looks like this:
/dev/sda1 461293804 440335112 0 100% /backup
It appears that there really are 20Gigs free, but that column shows 0 --
can i reliably ignore that column and use subtraction with the previous
two to compute the true free space?
Couple of things that might be relevant here.
By default, a certain percentage of each disk will be reserved for
root's use, typically 5%. This is set when the file system is created.
Also, you might want to check the output of "df -i" and be sure you're
not out of inodes. It's possibly to have a disk showing tens of
gigabytes of free space, but no new files can be created, or existing
ones extended, because there are no free inodes.
3rd. My recollection is that rebooting will fix this problem (for a
while), but I'd prefer not to have to reboot every couple weeks.
I fail to see why rebooting would make the tiniest bit of difference :)
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