Date: Sun, 14 Oct 2007 22:01:51 -0700 (PDT) From: Juri Mianovich <juri_mian@yahoo.com> To: freebsd-fs@freebsd.org Subject: comparing two filesystems with different newfs values ? Message-ID: <759671.62342.qm@web45603.mail.sp1.yahoo.com>
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system A has these three partitions that I created in
sysinstall, using the default sysinstall newfs values:
/dev/aacd0s1e 465759710 434158260 3655868 99%
/mount1
/dev/aacd1s1d 1891513834 1746678920 31344084 98%
/mount2
/dev/aacd2s1d 2030137706 1801943816 228193890 89%
/mount3
So, doing the math, the total space used of the three
filesystems is: 3982780996
(roughly 4 TB)
I just created a new filesystem on system B, where I
used newfs on raw disk to create a SINGLE large >2TB
partition. The newfs command I used was:
newfs -i 32768 -U /dev/aacd1
I then used rsync to transfer ALL of the data from the
old system to the new system. Now that I am done, and
I have re-run rsync several times to be sure that all
of the data is in place on the new system, the space
used on the new system is:
3552249780
That's a difference of almost .5 TB ... and
furthermore, I would think having less dense inodes
would actually _increase_ the effective space that all
those files take up, not _decrease_ it ...
So is this expected ? Does it have something to do
with moving the data from three partitions to one ?
The bottom line is, I want to be SURE that all of the
data is transferred before I scrap system A ... rsync
is telling me all the data is there, because when I
re-run it, nothing new gets transferred ... but I
really want to "prove" it by looking at the total file
size ... and I can't seem to do that currently.
Comments or suggestions ?
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