Using dd command and running out of space while cloning drive to img

Question

I have a problem with drive cloning. Im using dd on damaged disk with bad sectors trying to make an image from it. Im booting computer with Live Linux CD .

Damaged disk: sda 146GB (NTFS) External drive: sdb 300GB (NTFS)

After running the command below im running out of space on disk sdb.

dd if=/dev/sda of=/media/sdb1/hdd.img bs=4096 conv=noerror,sync

The question is why im running out of space on disk sdb ?

UPDATE: There is 300 GB of free space on partition sdb1

To be clear, you *do* have 146G of space available on `sdb`, right? — nickgrim, Sep 07 '12 at 10:33
It is okay, that your sdb drive has 300 GB capacity, but your sdb1 partition has also enough free space for that image file? — Eddie, Sep 10 '12 at 08:23
Yes because there is only 1 partition on disk sdb (whole 300GB) — Alan, Sep 10 '12 at 08:46

score 2 · Answer 1 · answered Sep 07 '12 at 09:31

2

/dev/sdb is a device special that represents the disk drive; it isn't a filesystem, but you've tried to use it as one.

Instead, try this:

dd if=/dev/sda of=/dev/sdb bs=4096 conv=noerror,sync

answered Sep 07 '12 at 09:31

Michael Hampton

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I dont want to clone drives one to one, i want to clone sda to image file (because sdb is USB disk drive). Im changing the question since it could be misunderstood. – Alan Sep 07 '12 at 09:36

Hubert Kario · Answer 2 · 2012-09-10T10:34:17.580

0

I'm not sure, but it looks to me like a problem in NTFS driver (problem with large files).

Did you mount the NTFS partition using ntfs-3g? Also, could you provide us with full dd output?

edited Sep 10 '12 at 10:34

answered Sep 10 '12 at 10:26

Hubert Kario

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Using dd command and running out of space while cloning drive to img

2 Answers2