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#1
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Disc Cloning
Downloaded and installed HDTune
Ran error scan. One red block, though report says 0.0 pc damaged Could this one block be the cause. If so, where do we go from here, please?? -- http://www.helpforheroes.org.uk/shop/ |
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#2
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Disc Cloning
On 05/09/15 18:24, Ophelia wrote:
Downloaded and installed HDTune Ran error scan. One red block, though report says 0.0 pc damaged Could this one block be the cause. If so, where do we go from here, please?? What exactly is the problem? You haven't said anything about the problem itself. You installed HDTune but then do you get any error messages? If so can you tell us something about it. To clone your disc, you could try CloneZilla. It works on most machines as it is Linux based program but can be booted in Windows environment. I have used it in the past to clone my Windows HD. |
#3
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Disc Cloning
Ophelia wrote:
Downloaded and installed HDTune Ran error scan. One red block, though report says 0.0 pc damaged Could this one block be the cause. If so, where do we go from here, please?? Well, this answers the question "what could trip up an ordinary backup program". It depends on the location of that bad sector, as to how critical it is. Using CHKDSK and the /r option, is good if the bad sector is in a data cluster on the partition in question. But not all errors fall in convenient places. The trial version of HDTune (try it for 30 days or so), the error scan will give the LBA address of the problem sector. The free version, 255, just gives a red block if there is an error. I think the Pro version, it lists the LBA of the sector with the error. http://www.hdtune.com/ ******* The problem with these sectors with errors, is finding a modern application that handles them properly. They mention here, that "ddrescue" is available under Cygwin, but that doesn't really impress me all that much. I had one utility "ported" under Cygwin, and the disk identifiers were all wrong. You could not tell that particular utility (using Windows notation), which partition to use. If the Cygwin version (runs under Windows) didn't work, you would use the Linux LiveCD version. And yes, using this is going to make your eyes glaze over. It's command line material, and requires knowledge of disk identifiers as a function of the environment you're working in. http://forensicswiki.org/wiki/Ddrescue The basic idea is, there is the source device and some destination thing. In the first example, you're doing a disk to disk copy. In the second, it's like making a .mrimg file, only recording even the sectors you don't really care about. So if you use this utility, with a 500GB source drive, the destination hard drive would need to be 500GB, or the imagefile would require room for a 500GB file. So for the second form of the equation, I might use an NTFS partition on a 1TB drive. ddrescue -n /dev/sda /dev/sdb ddrescue -n /dev/sda imagefile Later, to put the imagefile back as a hard drive, you can use the regular version of dd (since nothing is going to throw errors, with the new hard drive). So this command, is for moving the imagefile back onto a drive (as a "restore" command). dd if=imagefile of=/dev/sdb Some of the disk backup utilities, are supposed to be able to clone and "step over" errors for better or worse. The problem comes, when you actually try it, and the utility bombs out. The ddrescue is the only one I trust for this purpose, because that's the only problem the program claims to solve. And that's the problem of copying from a disk with CRC errors. The program only has that one purpose, that distinguised it from the regular dd command. To use the Cygwin program, you would install the Cygwin package, which would give you the cygwin.dll that is the key part of allowing foreign programs to work while in Windows. Using tick boxes, you only tick the items you want from Cygwin. For example, I have a Cygwin copy of "disktype" utility now, but if I run it, the output isn't exactly the same as the original program. One level of disk access seems to be modified, to make Cygwin mapping work in that case. I sure home someone else has a utility for you that works. As command line is a last resort. ******* The original reference to ddrescue, I found at the bottom of this page. You don't have to compile it from source - the package manager on a Linux LiveCD can download a working copy, to be run from the Terminal in command line mode. http://www.cgsecurity.org/wiki/Damaged_Hard_Disk Paul |
#4
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Disc Cloning
On 9/5/2015 11:20 AM, Stormin' Norman wrote:
On Sat, 5 Sep 2015 18:24:04 +0100, "Ophelia" wrote: Downloaded and installed HDTune Ran error scan. One red block, though report says 0.0 pc damaged Could this one block be the cause. If so, where do we go from here, please?? If you don't want to install Easeus and try that first, you can try to repair the drive or at least mark that sector / block as being bad, see below: If it is the C: drive, you can try running chkdsk c: /r from an administrative command prompt. Can you access the device manager and tell us exactly what make and model the drive is? The drive manufacturer might publish a repair utility. I suppose I should include the obligatory caveat; you should back up the drive before running chkdsk /r. Back in the day, there existed utilities that used the number of retries or access time to map out "slow" sectors with the assumption that they were on the way to bad anyway. Does that functionality exist today with more modern technology? I assume it's much more difficult to determine "slow" in a multitasking environment. |
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