Dd Copy Read Error

and for backup and recovery purposes. Contents 1 Using dd 1.1 Cloning a partition 1.2 Cloning an entire hard disk 1.3 Backing up the MBR 1.4 Create disk image 1.5 Restore system 2

Dd Copy Command

Using ddrescue 3 Disk cloning software 3.1 dd spin-offs 4 See also Using dd dd dvd copy The dd command is a simple, yet versatile and powerful tool. It can be used to copy from source to destination, dd copy linux block-by-block, regardless of their filesystem types or operating systems. A convenient method is to use dd from a live environment, as in a Live CD. Warning: As with any command of this type, you should

Dd Copy Mbr

be very cautious when using it; it can destroy data. Remember the order of input file (if=) and output file (of=) and do not reverse them! Always ensure that the destination drive or partition (of=) is of equal or greater size than the source (if=). The factual accuracy of this article or section is disputed. Reason: Are the conv= options safe to use? See: (Discuss in Talk:Disk cloning#remove conv sync noerror)

Dd Copy Partition

Cloning a partition From physical disk /dev/sda, partition 1, to physical disk /dev/sdb, partition 1. # dd if=/dev/sda1 of=/dev/sdb1 bs=64K conv=noerror,sync Warning: If output file of= (sdb1 in the example) does not exist, dd will create a file with this name and will start filling up your root file system! Cloning an entire hard disk From physical disk /dev/sdX to physical disk /dev/sdY # dd if=/dev/sdX of=/dev/sdY bs=64K conv=noerror,sync This will clone the entire drive, including the MBR (and therefore bootloader), all partitions, UUIDs, and data. noerror instructs dd to continue operation, ignoring all read errors. Default behavior for dd is to halt at any error. sync fills input blocks with zeroes if there were any read errors, so data offsets stay in sync. bs= sets the block size. Defaults to 512 bytes, which is the "classic" block size for hard drives since the early 1980s, but is not the most convenient. Use a bigger value, 64K or 128K. Also, please read the warning below, because there is more to this than just "block sizes" -it also influences how read errors propagate. See [1] and [2] for details and to figure out the best bs value for your use case. Warning: The block size you specify influences how read

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Dd Copy Disk To File

AskUbuntu Official Documentation User Documentation Social Media Facebook Twitter Useful Links Distrowatch Bugs: Ubuntu PPAs: Ubuntu Web dd copy directory Upd8: Ubuntu OMG! Ubuntu Ubuntu Insights Planet Ubuntu Activity Page Please read before SSO login Advanced Search Forum The Ubuntu Forum Community Ubuntu Official Flavours Support General Help [SOLVED] https://wiki.archlinux.org/index.php/disk_cloning dd: reading `/dev/sda1': Input/output error Having an Issue With Posting ? Do you want to help us debug the posting issues ? < is the place to report it, thanks ! Results 1 to 5 of 5 Thread: dd: reading `/dev/sda1': Input/output error Thread Tools Show Printable Version Subscribe to this Thread… Display Linear Mode Switch to https://ubuntuforums.org/showthread.php?t=1666299 Hybrid Mode Switch to Threaded Mode January 13th, 2011 #1 ibod View Profile View Forum Posts Private Message A Carafe of Ubuntu Join Date Sep 2010 Location Kent UK Beans 92 DistroUbuntu dd: reading `/dev/sda1': Input/output error Hi all, I was trying to copy from a hard drive, to an image file using :- Code: sudo dd if=/dev/sda1 of=/media/Iomega\ HDD/backup/pc130111.img Some info about the hard drive. The hard drive I am trying to copy is formatted ntfs and has XP on it. It is about 6 years old and is having problems. When booted from a 10.4 live CD. Most of the time the hard drive reports that it is not a S.M.A.R.T. capable drive. Once, it was, able to read the SMART data and reported OK except 3 bad sectors. From the above and especially the "smart / no smart" I am assuming that there is likely a controller problem on the drive as well as the bad sectors. dd exits with the following error :- Code: ubuntu@ubunt

here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring http://superuser.com/questions/622541/what-does-dd-conv-sync-noerror-do developers or posting ads with us Super User Questions Tags Users Badges Unanswered Ask Question _ http://askubuntu.com/questions/253117/how-do-i-fix-an-input-output-error-using-dd Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top What does dd conv=sync,noerror do? up vote 9 down vote favorite 3 So what is the case when dd copy adding conv=sync,noerror makes a difference when backing up an entire hard disk onto an image file? Is conv=sync,noerror a requirement when doing forensic stuff? If so, why is it the case with reference to linux fedora? Edit: OK, so if I do dd without conv=sync,noerror, and dd encounters read error when reading the block (let's size 100M), does dd just skip 100M block and reads the next block without writing something (dd conv=sync,noerror writes zeros to 100M of output - so dd copy read what about this case?)? And if is hash of original hard disk and output file different if done without conv=sync,noerror? Or is this only when read error occurred? linux backup dd forensics share|improve this question edited Jul 22 '13 at 6:24 Roney Michael 7441815 asked Jul 22 '13 at 2:07 dding 67114 Upvote for the question "Is conv=sync,noerror a requirement when doing forensic stuff? " –nergeia Feb 20 '14 at 10:00 add a comment| 2 Answers 2 active oldest votes up vote 16 down vote conv=sync tells dd to pad each block to the left with nulls, so that if, due to error, the full block cannot be read, the full length of the original data is preserved, even though not all of the data itself can be included in the image. that way you at least know how damaged the data is, which might provide you with forensic clues, and if you can't take an image at all due to bad blocks or whatever, you can't analyze any of the data. some is better than none. conv=sync,noerror is necessary to prevent dd from stopping on error and performing a dump. conv=sync is largely meaningless without noerror. http://linuxcommand.org/man_pages/dd1.html http://vlinux-freak.blogspot.com/2011/01/how-to-use-dd-command.html share|improve this answer edited Apr 23 '15 at 15:04 answered Jul 22 '13 at 3:15 Frank Thomas 21.1k23962 Question: if one does dd without conv=sync,noerror does hash of hard disk and image file become different? &n

communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Ask Ubuntu Questions Tags Users Badges Unanswered Ask Question _ Ask Ubuntu is a question and answer site for Ubuntu users and developers. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top How do I fix an Input/Output error using dd? up vote 6 down vote favorite 3 Hi i'm Trying fixing my Windows 7 system with a broken harddrive, but it's still running. I'm trying copy all data to a new drive to reinstall Windows 7. Drive called SQSERVICE. I can't copy at all - see below: $ sudo dd if=/dev/sdc1 of=/dev/sda1 dd: reading `/dev/sdc1': Input/output error 11233976+0 records in 11233976+0 records out 5751795712 bytes (5.8 GB) copied, 187.731 s, 30.6 MB/s How to fix this "Input/output error"? hard-drive drive dd share|improve this question edited Feb 9 '13 at 13:32 gertvdijk 37.9k1598171 asked Feb 9 '13 at 13:24 Erazer 31114 1 @Gertvddijk thanks to fix my spelling problem, i'm from netherlands still learning english well. –Erazer Feb 9 '13 at 13:36 add a comment| 2 Answers 2 active oldest votes up vote 8 down vote You said it yourself: your disk is broken. You can try ddrescue, it may be able to work around the broken path. Beware though, that you will lose data. Restoring from backup will be easier :) The correct usage of ddrescue is as follows: sudo apt-get install gddrescue sudo ddrescue /dev/sdc1 /dev/sda1 or if you want to pipe stdout to the progess monitoring tool: sudo ddrescue /dev/sdc1 /dev/sda1 | pv share|improve this answer edited Sep 27 at 22:47 David Foerster 10.6k93052 answered Feb 9 '13 at 13:26 Dennis Kaarsemaker 4,9741432 yes i said that but restoring from backup it's on that drive.. and i this drive have only sector problem,