0
votes
0answers
54 views

dd records in records out different

Simple question: is it OK if the output in dd for "records in" and "records out" are different by 1? Or is this an indication that a disk error has occured? 96088211456 bytes (96 GB) copied, 873.174 ...
0
votes
0answers
124 views

mdadm RAID1 on OS drive by cloning, then changing the UUID on 2nd disk?

Ok, I've been doing some research into installing ubuntu server onto an mdadm raid1 setup and ive come across a couple ways: 1) install it onto two drives by using the "manual" method on the cd ...
3
votes
1answer
539 views

Migrating to LVM

The drive on my Ubuntu media server is nearly full. I hope to add another 2TB of capacity to the machine and would prefer for all 3.5 TB to be recognized as a single drive. To complicate things, I ...
2
votes
1answer
886 views

Linux DD command partition -to- partition

I just used the DD command to copy the contents of one partition over to another partition on another drive, like this: dd if=/dev/sda2 of=/dev/sdb2 bs=4096 conv=noerror sda2 partition was 66GB and ...
1
vote
1answer
261 views

Does `dd` on a device skip anything?

I wanted to achieve a system disk backup with an Ubuntu live CD. I used the following command: dd if=/dev/sda conv=sync,noerror bs=64K | gzip -c > /media/external/image.gz This seemed to work. ...
4
votes
2answers
416 views

Recovering Ubuntu after filesystem was overwritten using dd

I had an Ubuntu installation on my laptop, on an encrypted LVM (this was /dev/sda1). I was planning to write an Arch Linux image to my USB drive (/dev/sdc1), following this guide - ...
0
votes
3answers
640 views

How can I copy my Mac's entire hard drive to an external hard drive?

I want to copy my entire hard drive to an external hard drive of equivalent size. I'm using a Mac, and I was thinking about booting Ubuntu so that I can use dd, but I'm not sure how to do that. If ...
2
votes
1answer
2k views

How to do a hexdump of first track of HDD?

How would i do a hexdump in Ubuntu for the first track of a HDD? I am looking for a winhex-esque output if that makes sense. The first track has 63 sectors, each 512 bytes long. I tried dd ...
0
votes
1answer
2k views

How to create an image.dd file to be used in virtualbox?

I want to backup my Windows machine before I put Ubuntu on the hard drive instead. Following the instructions on the VirtualBox website it says to create an image.dd file using dd. I booted up from ...
5
votes
1answer
445 views

dd gets slower while reading and writing

user@user-laptop:~$ sudo dd if=sd_backup of=/dev/sdd bs=4M conv=noerror,sync 205520896 bytes (206 MB) copied, 28.564 s, 7.2 MB/s 247463936 bytes (247 MB) copied, 57.1285 s, 4.3 MB/s 260046848 bytes ...
7
votes
5answers
15k views

How Do I Find The Hardware Block Read Size for My Hard Drive?

I'm trying to figure out the optimal size for a large copy from my hard drive using dd. I'm trying to figure out what the best blocksize to use it, which I would assume is the hardware block size for ...
1
vote
1answer
1k views

Restoring a HDD backup image from the Ubuntu Live CD

I want to restore a HDD image I have to my laptop's HDD while booted off the Ubuntu Live CD. The laptop's HDD is unformatted and has no partitions. I expected this to work: $ sudo dd ...