I have a query someone may be able to shed some light on...

We have a Solaris 10 OS Sun V490 server Sparc.

I have a SAN attached EMC Clarrion LUN which we have app data stored on.
Pseudo name=emcpower0a
CLARiiON ID=CK200070300470

Due to storage requirements - I need to migrate this data onto a SAN attached DMX Symmetrix volume.
Pseudo name=emcpower1a
Symmetrix ID=000290103149

I have the existing Clariion disk attached and configured, labelled, partitioned as normal and mounted under /emc.

I took the newly presented DMX storage disk and made this visible to format (devfsadm & cfgadm commands) and then labelled and partitioned this disk also. This is now mounted as /NEWemc.

* At this point - I discovered that Solaris has nuances with regards to direct copying of symbolic links so I have chosen to not use a straightforward...

Code:

"cp -rp /emc/* /NEWemc/"

I had attempted this firstly but this posed issues for us as rather than copying the symbolic link - actual files were fetched for the copy. I believe there is a '-H' switch that can be incorporated but I did not get this to work properly for me.

Instead what I chose to do was perform a tar direct input/output compress/extract.

cd /emc
tar -cfp - ./* | (cd /NEWemc/; tar -xvfp -)

This works very effectively and all files/directories/symbolic links appear to come across from the old disk to the new as expected.

** However! **
Both du and df filesystem usage commands are reporting a very different sitaution

Inquiry into 'old' disk filesystem

Code:

root@server:/emc> df -k /emc
Filesystem            kbytes    used   avail capacity  Mounted on
/dev/dsk/emcpower0a  61756540 12339844 48799131    21%    /emc
root@server:/emc> df -h /emc
Filesystem             size   used  avail capacity  Mounted on
/dev/dsk/emcpower0a     59G    12G    47G    21%    /emc
root@server:/emc> du -sk /emc
12278596        /emc
root@server:/emc> find /emc/ | wc -l
   73289

Inquiry into 'NEW' disk filesystem

Code:

root@server:/emc> df -k /NEWemc/
Filesystem            kbytes    used   avail capacity  Mounted on
/dev/dsk/emcpower1a  69586089 28531665 40358564    42%    /NEWemc
root@server:/emc> df -h /NEWemc/
Filesystem             size   used  avail capacity  Mounted on
/dev/dsk/emcpower1a     66G    27G    38G    42%    /NEWemc
root@server:/emc> du -sk /NEWemc/
28466121        /NEWemc
root@server:/emc> find /NEWemc/ | wc -l
   73289

I understand that du and df can sometimes display slightly skewed results but the discrepancy here is significantly different!
I have unmounted the /NEWemc filesystem and also rebooted the server - but the filesystem usage stats do not fall into line... which is what I would expect?

Anyone have any suggestions please?
Am I incorrect in my expectations?