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Victor Hooi
Username: victorhooi

Registered: 4-2004
Posted on Tuesday, Jan 5, 2010 - 3:16:   

heya,

I'm attempting to recover files from a disk image I made of an NTFS partition. The disk image is stored on an external USB harddisk, and is around 120 Gb in size.

I've opened the image, and told WinHex to treat it as a disk.

When I attempt to use refine volume snapshot, it gives an estimated time of around 2 hours.

However, partway through, when it hits 68% with around 25 mins to go, Winhex seems to freeze. (Titlebar says "Not Responding"). And under messages, I have:

"Cannot read E:\DiskImage1\DiskImage1.dim.001". The request could not be performed because of an I/O device error.

The image was created using Active@ Partition recovery, as a raw image, I believe.

Does this error message probably mean there's a physical fault with my USB HDD? If so, is there any way to ignore that error, or somehow get Winhex to still try recovering files from that image? I'd thought Winhex would come up with a message saying ignore, or something like that?

Thanks,
Victor
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Stefan Fleischmann
Username: admin

Registered: 1-2001
Posted on Tuesday, Jan 5, 2010 - 8:47:   

Yes, that means there is/was a problem reading the image from that USB hard disk.

No, WinHex would not come up with a message box that requires user interaction in this situation. It just outputs error messages to the Messages window FYI and continues.

In this case (assuming you were patient and gave it some time) something kept it from continuing, possibly related to the I/O error that was reported, maybe another more severe error.
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W. Spiegl
Username: ws

Registered: N/A
Posted on Saturday, Jan 9, 2010 - 19:47:   

if your usb drive has no own power supply (e.g. a 2,5'' external usb hd) things like this can happen sometimes while running. There is too less power - it works fine at the beginning but interrupts suddenly because the HD needed too much energy for one short moment. I had effects like this when taking an image of an external usb hd. In many cases it helps to use the cable with 3 ends (2 for usb, the third cable for additional power supply).

If your usb drive has an external power supply this can happen too. Sometimes the usb connection exits without a known reason.

As USB 2.0 is still slow I would recommend you to take the USB HD directly into your system (if you can take it out of the usb device). We use internal metal frames which can be opened at the front side of the computer - and the HD can be removed / replaced by another one (please do not replace while running)from there without opening the computer. Works fine with SATA - the old PATA (IDE) frames were not so good - they were unsecure and reduced the speed.

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