I have a 3.3 TB partition (yes really) that is formatted with ext4 and 4
kiB blocks. What little data I have on that appears to use up an
extraordinary amount of space, so I had a closer look.
root at newcollab:/home/adminlion# df -h
Filesystem Size Used Avail Use% Mounted on
3.5T 43G 3.3T 2% /var
we see that 43 GiB appear to be taking up something that gets rounded to
if we look at:
root at newcollab:/home/adminlion# df
Filesystem 1K-blocks Used Available Use% Mounted on
3696706360 44362800 3464561624 2% /var
now 44362800 4k blocks are 169.23 GiB, which does indeed round to 200
GiB. similar usage also gets reported when I get the properties of the
share via cifs.
Block count: 937689088
Reserved block count: 46884454
Free blocks: 912175341
so while df shows 4 times as many available 1k blocks as debugfs, which
after all shows the actual number of 4k blocks, both are more or less in
agreement as to the space used. This leads me to believe that somehow
only 1k of every 4k block gets used. Now i could of course reformat to
1k blocks, but I'd prefer to avoid that.
OS is Lucid64 and the volume is a LVM volume.
Has anybody seen this before? Uncle Google was rather mum on the subject.
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