Ethernet disk and corrupted files

Hi to all,
I´ve recently bought a LaCie Ethernet MiniDisk and I copied some files in it, but when I copy them back to the G5 HD, I have found that the OS tell me that they are UNIX files and I can´t open them with any aplication.
How can I link this files with the original aplication? I´ve tried "Open with ..." but the application doesn´t recognize the file.
Sorry about my english.

Your problem is definitely ressoure fork related. Some file types save information in the ressource fork inside the file. File systems familiar with that do not have problems, like HFS (=Mac OS Standard) or HFS+ (=Mac OS X Extended). Other file systems do not "know" of this ressource fork ad therefore it's often lost. FAT32 would be an example for such a file system. Very often USB sticks or external FireWire/USB hard drives come preformatted with FAT32. So in order to use them with such files it's neccessary to format them as Mac OS (Extended).
Since your drive is acting like a networked file server you only see "AppleShare" as the format. I don't know the particular drive you're using, but look in its manual for some way to configure it, so that you can reformat its drive. If that's not possible, I'd return the drive and get a common FireWire drive where this is no problem.
You mentioned that your files don't have extensions. In case that's true and they're not just hidden (can be checked by command+i) they definitely contain information in the resource fork resulting in the unix style icons you see now.
If you find no way to reformat the drive and want to keep it anyways you can always archive your files before you copy them over. You can do so by using OS X's builtin ZIP. That way the resource fork information won't get lost as long as you unzip the file on a Mac file system.
For more info on resource fork see:
http://en.wikipedia.org/wiki/Resource_fork

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FROM APPLE:
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Repair the Hard Drive and Permissions
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Boot From The Recovery HD:
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1. Repair the Hard Drive and Permissions
Boot from your Snow Leopard Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities menu. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer.
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2. Reinstall Snow Leopard
If the drive is OK then quit DU and return to the installer. Proceed with reinstalling OS X. Note that the Snow Leopard installer will not erase your drive or disturb your files. After installing a fresh copy of OS X the installer will move your Home folder, third-party applications, support items, and network preferences into the newly installed system.
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I have an external hard drive and I tried plugging in and selecting the hard drive and making a "New Image" to copy to the external hard drive destination, but it just stops a few seconds into it and tells me there is an input/output error. I tried read only, read/write only, compressed options for making a copy and all yield the same result.
In Disk Utility, I believe I have a partition -the Macintosh HD. I have listed on the left hand side: 320.07 GB Hitachi HTSS45.....etc. and below it in non-bolded, grey lettering it says "Macintosh HD."
The Hitachi, when clicked upon, shows the S.M.A.R.T. status as Verified and the Macintosh HD doesn't show much in details except for "Not mounted."
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I'm getting nervous to keep turning on and off the computer on force start and shut downs, especially since I have been reading up that the longer the computer is on, the more the hard drive is in use and the more chance for it to start deleting or overwriting my files. Is this true?
It's not mounted anymore since it was momentarily mounted. I just want to get my files off the disk and save them to my external hard drive. That is my main goal right now. What can I do?
Thank you in advance for your help!

If you want to preserve the data on the boot drive, you must try to back up now, before you do anything else. It may or may not be possible. If you don't care about the data, you can skip this step.
There are several ways to back up a Mac that is unable to fully boot. You need an external hard drive to hold the backup data.
1. Boot into Recovery (command-R at startup) or from a local Time Machine backup volume (option key at startup.) Launch Disk Utility and follow the instructions in the support article linked below, under “Instructions for backing up to an external hard disk via Disk Utility.”
How to back up and restore your files
2. If you have access to a working Mac, and both it and the non-working Mac have FireWire or Thunderbolt ports, boot the non-working Mac in target disk mode by holding down the key combination command-T at the startup chime. Connect the two Macs with a FireWire or Thunderbolt cable. The internal drive of the machine running in target mode will mount as an external drive on the other machine. Copy the data to another drive. This technique won't work with USB, Ethernet, Wi-Fi, or Bluetooth.
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3. If the internal drive of the non-working Mac is user-replaceable, remove it and mount it in an external enclosure or drive dock. Use another Mac to copy the data.

Ethernet disk and corrupted files

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