Dd Input Error
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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 dd writing to ‘/dev/sdb’ input/output error might have Meta Discuss the workings and policies of this site About dd input/output error dvd Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads "dd: /dev/rdisk3: input/output error" 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 dd writing to input/output error 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
Dd Conv=noerror
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 dd
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
Dd Skip Errors
Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs ddrescue: write error: input/output error Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just dd input/output error mac like you, helping each other. Join them; it only takes a minute: Sign up Can't back up SD card with dd, complains “Input/Output Error” up vote 4 down vote favorite I have successfully backed up my SD http://askubuntu.com/questions/253117/how-do-i-fix-an-input-output-error-using-dd card twice by issuing the following command sudo dd if=/dev/sdb of=/home/user/Documents/raspi/images/raspi1.v2.iso bs=1M However, now it is giving me the following error: dd: reading `/dev/sdb': Input/output error 3027+1 records in 3027+1 records out 3174977536 bytes (3.2 GB) copied, 200.723 s, 15.8 MB/s Looking around the net, this seems to indicate a corrupted SD card. However, my raspi (which I runs off of this SD card) runs fine (ish) and Disk Utility claims that the sd http://stackoverflow.com/questions/19470160/cant-back-up-sd-card-with-dd-complains-input-output-error card is not corrupted. Is there another way I can find out why dd is complaining, if the card is corrupted, and if so, how to fix the SD card. UPDATE: I gave up trying to run dd on the SD card, but I did figure out what was corrupting my SD card, it was the updating of the Raspi firmware as specified on this site backup dd flash-memory share|improve this question edited Oct 21 '13 at 22:34 asked Oct 19 '13 at 19:28 puk 6,0941065126 add a comment| 1 Answer 1 active oldest votes up vote 2 down vote It is possible that your raspi simply does not hit badblock on your SD card, and that's why it appears to work fine. You can dd image and ignore bad blocks by adding conv=noerror parameter. This will replace bad blocks with zeros, and if you dd that image back to another same-size card, it should work the same. share|improve this answer answered Oct 19 '13 at 19:34 mvp 47.3k85191 1 I already tried that and it still does not work. It gives more or less the same error, but many more times –puk Oct 19 '13 at 19:42 Hmm. Looks like it is time to buy new SD card. You can try to force remapping bad sectors by s
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 http://superuser.com/questions/622541/what-does-dd-conv-sync-noerror-do/1075837 company Business Learn more about hiring developers or posting ads with us Super User Questions http://superuser.com/questions/927562/dd-from-dev-zero-to-dev-sda-does-not-overwrite-the-whole-disk Tags Users Badges Unanswered Ask Question _ 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 input/output error vote 9 down vote favorite 3 So what is the case when 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 dd writing to block and reads the next block without writing something (dd conv=sync,noerror writes zeros to 100M of output - so 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-d
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 Super User Questions Tags Users Badges Unanswered Ask Question _ 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 dd from /dev/zero to /dev/sda does not overwrite the whole disk up vote 1 down vote favorite I issued dd command to zero out my hard disk. The command completed successfully but only part of the hard drive was overwritten: mint@mint ~ $ sudo dd if=/dev/zero of=/dev/sda dd: writing to ‘/dev/sda’: Input/output error 258416001+0 records in 258416000+0 records out 132308992000 bytes (132 GB) copied, 3741.09 s, 35.4 MB/s The following shows the configuration of the hard drive: mint@mint ~ $ sudo fdisk -l /dev/sda Disk /dev/sda: 320.1 GB, 320072933376 bytes 255 heads, 63 sectors/track, 38913 cylinders, total 625142448 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x8f45867a Device Boot Start End Blocks Id System Notes: I recreated the partition table after I issued the dd command. That's why the partition table shows up. The hard drive has bad sectors, 200 of which in pending state. I issued the dd command to force the reallocation of these bad sectors. The write speed seems good at 34MB/s and accordingly I would like to install Linux on a partition located beyond the worn out part of the disk. I do not care about data loss as I do not plan to store any valuable data on the hard disk. In spite of the bad sectors, the dd command did not result in any I/O error. smartctl output: mint@mint ~ $ sudo smartctl -a /dev/sda smartctl 6.2 2013-07-26 r3841 [x86_64-linux-3.13.0-37-generic] (local build) Copyright (C) 2002-13, Bruce Allen, Christian Franke, www.smartmontools.org === START OF