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  #1  
Old 08-22-2006, 05:11 PM
Zed Zed is offline
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I/O error while backing up

Hello!

I'm trying to back up my MacBook hard drive to an external drive via SuperDuper! but it fails to copy everytime, saying it's unable to copy a certain file (which is different every time).

I searched this support forum for a solution and decided do "zero" the external hard drive, without success.

I asked help in another Mac forum and I realised my partition scheme wasn't "GUID_partition_scheme" so I fixed that and tried again... and I'm still unable to complete a backup.

So I'm back here, aking directly for help this time

Is there a way to know if it's a hardware problem?

Me external hard drive is a 250 GB Seagate in a NexStar3 USB/FW enclosure. I used the Firewire interface to backup.

Thanks!

Luc
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  #2  
Old 08-22-2006, 07:41 PM
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dnanian dnanian is offline
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Hi, Luc. If the file is different every time, it's likely that you're having interface issues (hardware). You can see what device is causing problems by looking at the system.log -- it'll indicate an I/O error with a device ID (something like "disk2s1") that you can then match with disks listed with either Disk Utility or System Profiler.

My guess is that it's the NexStar3 controller. I'd try the USB interface to see if that behaves better...
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Old 08-22-2006, 10:46 PM
Zed Zed is offline
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USB interface tried, and made its proofs.

I backed up all my MacBook drive without any problem.

So, doctor, what is your diagnosis?

I'll try to backup again with FW, and post my log here if you need it.

Thanks!

Luc

Last edited by Zed; 08-22-2006 at 10:48 PM.
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Old 08-23-2006, 08:45 AM
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My diagnosis is that it's likely that this is a non-Oxford based drive, and isn't fully compatible with OS X on its Firewire end...
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Old 08-23-2006, 03:12 PM
Zed Zed is offline
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Here is how it goes :

| 02:51:18 PM | Info | WARNING: Caught I/O exception(2): No such file or directory
| 02:51:18 PM | Info | WARNING: Source: /Library/Documentation/Help/MacHelp.help/Contents/Resources/Spanish.lproj/pgs/mh1138.html, lstat(): 0
| 02:51:18 PM | Info | WARNING: Target: /Volumes/Backup MacBook B/Library/Documentation/Help/MacHelp.help/Contents/Resources/Spanish.lproj/pgs/mh1138.html, lstat(): -1
| 02:51:18 PM | Info | Attempting to copy file using copyfile().
| 02:58:54 PM | Info | Successfully copied file.
| 03:06:30 PM | Error | SDCopy: Error "Input/output error" encountered while setting HFS meta data for /Volumes/Backup MacBook B/Library/Documentation/Help/MacHelp.help/Contents/Resources/Spanish.lproj/pgs/mh1138.html of type: 8
| 03:06:31 PM | Error | : Input/output error

Again, with a different file.

I was sure It'd be ok this time... backup was almost finished.

Does the diagnosis still stands?
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Old 08-23-2006, 03:14 PM
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Was this with FireWire? If so, yes, diagnosis still stands.
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