4
votes
1answer
233 views

Partially overwrote /dev/sda, can I recover anything?

I was messing around with my new hard drive, which only contains some personal files, and to check its write speed, I typed: sudo dd if=/dev/zero of=/dev/sda, /dev/sda/ being the new 2 TB connected to ...
2
votes
2answers
164 views

dd to clone to smaller sdcard

One of my Raspberry Pi's is using a 4GB SDcard for the root/boot filesystem. As seen when mounted on another system: Disk /dev/sdc: 3904 MB, 3904897024 bytes 121 heads, 62 sectors/track, 1016 ...
1
vote
2answers
59 views

`dd` to specific location [closed]

dd is a great tool for copying and conversion. Is there any way by dd (or by any other way), to dump the first few bytes from a file to an unmounted partition? Something like this: dd if=hda2.pbr ...
2
votes
2answers
28 views

Backing up a partition

I am pretty new to linux. I mostly started learning after I purchased a couple of Raspberry Pis. I like to make backups of my images as I have often made the mistake of corrupting my data :). ...
5
votes
1answer
121 views

Partitions same size but different block [closed]

I tried to backup my partition using dd on another disk and I created a partition of the same size. When I finished the copy I had problems mounting the partition since I got bad geometry: block ...
1
vote
0answers
143 views

dd primary partition slow transfer rate

Can someone explain me why if backup ,using dd, a primary partition to a primary partition on other disk the transfer rate (MB/s) is significantly slower compared to the the rate I have if the ...
1
vote
1answer
39 views

dd behavior, default writing and partitions

I am confused about the behavior of dd. Say we have some SD card called /dev/foo and this card has partitions /dev/foop0 and /dev/foop1. Using dd, I can set the of argument to /dev/foo and dd won't ...
5
votes
1answer
166 views

Deploying filesystem images onto a partition of arbitrary size

I would like to establish a deployment process for Ubuntu machines based on root FS images. I would like to restore the image onto a simply-formatted hard drive (I can completely erase the disk during ...
5
votes
2answers
1k views

Linux/GParted can see partition table but dd bs=512 count=1 can't

I have an MBR formatted sd card and when connect to a Linux machine (xubuntu 12.04) it can mount a partition and parse the file system (as can GParted). However, when I try to read the MBR from the ...
2
votes
2answers
1k views

How to use DD to clone a partition off a disk image?

I have a disk image, it's a "whole" disk image, e.g., contains multiple partitions, and I want to clone just one of them (not the first one..) onto a partition on an external drive with multiple ...
1
vote
3answers
364 views

Why does this work: “cp image.bin /dev/mapper/loop0p1”?

Why does this work? cp image.bin /dev/mapper/loop0p1 image.bin is a partition image. I have tried it and works, but why? Shouldn't a dd be used?
2
votes
1answer
470 views

fdisk, dd, and the Rapsberry pi

I was trying to wipe my 4GB SD card which acts as the hard drive for the Raspberry Pi, so I went into Mac OS X Disk Utility* and Erased the entire disk, and specified that the whole disk be one big ...
4
votes
2answers
634 views

Help with unzipping a .dd.gz, possibly corrupted

I recieved this file that I was told was a copy of a hard drive (or disk). The file is "sheeva-mem.dd.gz". I tried to unzip the file in a linux Fedora machine. This yielded "unexpected end of file". ...
5
votes
2answers
3k views

Unpack files and directories from an image created by dd?

I created an image of an NTFS partition using dd. I wonder if I can unload/unpack the files and directories in the image to any partition whose size is larger than the image size, so that I can ...
1
vote
1answer
755 views

Adding a populated existing disk device to a QEMU raw image

I have a raw QEMU image (vda.raw), and I would like to resize it and add an existing partition, using data I have in a file that contains a raw ext3 file system populated with data (vdb.raw). The two ...