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On 11/9/2012 10:14 AM, Volker Armin Hemmann wrote: |
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> Am Freitag, 9. November 2012, 01:38:41 schrieb mindrunner: |
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>> volker, what is your intention to say i am dumb and stupid. actually you |
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>> do not know me. |
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> |
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> everybody does something dumb and/or stupid once in a while. I average that |
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> one to 1/day. |
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> |
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> There are two ways to react if someone points out that something you do is not |
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> the best idea since sliced bread. |
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> |
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> -> oops. Yeah, I see it. |
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> or |
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> -> sulking. |
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I'm going to have to agree with Volker on this. I don't believe he was calling |
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*you* stupid - just the idea of using dd to transfer files from old drive to |
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new drive. The dd utility has it's good uses - that's just not one of those |
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good uses. |
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> no, it does not. Apart from fragmentation you also copy all deleted files. All |
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> damaged blocks AND the UUID. |
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> |
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> Oh, and it is slow (I know, fiddling with blocksize etc you can speed it up a |
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> lot. Still slow). |
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Yes, you copy everything with dd, and it is extremely slow. It is better to |
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use another utility to just copy the files and directory structure from the old |
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drive to the new one. |
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> Create an image with dd to do some file rescuing? forensic stuff? as a template |
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> for containers? To burn it on a dvd/cd? Well, those are valid uses for dd. |
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> Converting files? Yes, that is what dd was made for. |
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Agreed. |
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> Copying a partition to another disk, different disk? Wow.. that is just wrong. |
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> Even if both disks were identical it would not be great idea. Just a 'well, it |
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> does work and at least I am not punishing the new disk' way to do it. |
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> |
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> Mind you, cp -auv is not the best way either. With ACLs&co it is not such a |
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> good choice. And I am surprised that Joerg Schilling hasn't posted how |
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> incredible star is for this job yet. Btw, star is a really good tool for the |
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> job. It just needs a lot of typing. |
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> |
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> tar, rsync, cp, star... there are many good or good enough ways to copy files |
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> from one harddisk to another |
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> |
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> dd doesn't belong in that category. |
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Very true. I'd personally rather use tar or even dar to copy the files. cp |
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has it's limitations, though it is faster, as it doesn't use compression |
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(technically, you don't need that with tar, either). |
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Regards, |
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Chris |
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