Copied disk image checksum fail

Created a read-only encryted disk image of a batch of proprietary hardware pictures.
Opened and verified no issues with the original dmg file.
Copy to a portable firewire drive.
Throws up with a checksum error every time trying to open the copied dmg file, even before I unplug the firewire disk.
Checked it with diskutility and it even says that the underlying encrypted folder is fine, but will not allow it to pass through the checksum to mount.
??? Dunno what is going on here.

The problem appears to be USB related.
Was not paying attention. Normally the firewire drive in on a notebook using the firewire ports - I had it temporarily on the MDD using the USB port on the drive. [Quick trip to Radio Shack and $34 for a 6ft firewire cable which will reach around to the back -  for all future use.] Now the copied files work just fine using a firewire cable.
I have LOTS of issues with USB on this MDD, and always have; had to remove the USB ports from the monitor because they continually locked up the entire USB structure; the brightness control on the monitor has NEVER worked.
Technology is never perfect.

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  • Disk image not mounted

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    “I got it resolved. Apparently it had to do with one of the files being open on the disk from the drive. I had browsed the disk with one of my windows boxes here and it must have left one of the folders "open". Anyway, I rebooted the TC and we are good to go now.”
    *Proper Computer Name* #
    Make sure your computer has a proper name. Go to System Preferences --> Sharing. Time Machine needs to differentiate your computer from others on your network (i.e. "Bills MacBook" or "Office iMac"). If the "Computer Name" field is blank, create a name. Realize that if this step is necessary, you will likely have to start the Time Machine backup process over again and do another full initial backup.
    According to this article, [http://support.apple.com/kb/TS1760], Time Machine may experience problems if your computer name includes certain characters. Make sure the computer name only includes ASCII characters from the following set.
    (0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ)
    Once a change in the computer name occurs, you should stop and restart Sharing on the affected computer. Uncheck and then recheck Sharing in the Services list on the left.
    Let us know if any of the above was helpful.
    Cheers!
    Message was edited by: Glenn Carter

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