Partition Filesystem backup / verification

Hello,
I am devising a plan to backup server's filesystems before they are 
converted (moving from Redhat 6.x to Debian 3.0).
right now dd of=/dev/sda3 of=./servername-sda3.img  works great, but I 
need to be 100% sure that everything is fine with the filesystem image.
In order to verify that sda3 and the image file are the same I am using 
md5sum, dd if=/dev/sda3 | md5sum  > device.md5sum
and md5sum servername-sda3.img > image.md5sum. This is all done at the 
same time (i.e. backup, then verify)
My question is will the process I am using actually detect problems or 
is it just redundant (i.e. the system would generate a read error or 
write error if there were an actual problem). Thanks in advance.




Sean McAvoy
Network Analyst
Megawheels Technologies Inc.

Phone:	416.360-8211 x242
Fax:		416.360.1403
Cell:		416.616.6599
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