Copying files vmdk, checksums do not match

I'm under esxi 4 currently, and I'm going to migrate my vitrual servers into an esxi box 5. I added a stand alone SATA Server esxi 4. I stop the virtual server and copy the files from the old data store (a raid 5 array) on stand alone drive (data store). The virtual server has several readers and I so 4 vmdk files to copy. Initially, I copied the vmdk files using the data store Navigator. Once the copy is complete, I used the md5sum command to verify the integrity of the copy from the original and the checksums do not match. I then attempted to use the CLI and issued the-i vmkfs command to copy the files individually (one at a time). Yet once checksums do not match. The size of the blocks on the two data stores is the same (4 MB), so I'm not sure why my checksums do not match after copying. Is this normal? The server has no snapshots etc.

I used this link for the correct procedure-

http://KB.VMware.com/selfservice/microsites/search.do?language=en_US & cmd = displayKC & externalId = 900

It might be possible that there is bit errors that occur during the copy.  I've seen this happen even with high end RAID controllers usually get fixed with firmware updates.  You can check if there are updates for your controller.

To find out if you have bit errors, try the following:

Make a copy of the chart on the single disc and check the md5 on the single disc.  He notes down.  Make a second copy (probably the same) of the table on the single disc and check the md5 second on the single disc.  If the two s md5 on the match single disc, then there is something in the copy mechanism that is edit the files slightly and causing a different md5 of the original on the table.  If they do not match, then it is likely you have found errors of bit of the controller.

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