Mac Terminal Cp Input/output Error
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Input Output Error Mac Disk Utility
Ask Question _ Ask Different is a question and answer site for power users of Apple hardware and software. Join them; it only how to find corrupt files on mac 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 to identify and fix files with corrupted / inaccessible how to fix corrupted files on mac disk blocks up vote 6 down vote favorite 5 I have a late 2011 Macbook Pro, running Mavericks 10.9.2. Its sole HDD is a 750GB drive, formatted with Bootcamp. It's still running reasonably well, but in running a defragment pass on it, I've identified that there are a bunch of files which are refusing to be moved by the defragmenter (iDefrag). iDefrag reports a POSIX error code of 5 when accessing the files. Picking one at random and
Disk Utility Input Output Error New Image
trying to copy the file to another location in the shell also reports an error, which makes me think the problem is real and with the disk / FS. Output of cp is: cp: unity_nophysx.nexe: Input/output error Error code 5 is 'access denied' as far as I'm aware, but the defrag process is running as administrator and running cp using sudo on the suspect file makes no difference. Disk Utility, fsck and the Apple Hardware Test all claim the disk is fine. No SMART errors reported, and while there were some permissions errors, they weren't with the files iDefrag is complaining about, and Disk Utility claims to have fixed them without complaint. There are maybe a hundred or more corrupted files, but still a very small fraction of the drive. As far as I can tell, no system files or crucial data are affected. While it would be nice to retrieve the data, I don't mind reinstalling or going to backups. At this point I don't know if it's really the drive dying, just some bad sectors due to the drive being moved while writing, or some other minor corruption that can be worked around. I'm assuming the worst case, and that most likely I'll have to get a slightly larger HDD and clone the existing drive to avoid having to rebuild the system. My question is really how I
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 osx input/output error Overflow the company Business Learn more about hiring developers or posting ads with us Ask fix corrupt files mac free Different Questions Tags Users Badges Unanswered Ask Question _ Ask Different is a question and answer site for power users of
Corrupted Excel File Mac
Apple hardware and software. 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 http://apple.stackexchange.com/questions/129030/how-to-identify-and-fix-files-with-corrupted-inaccessible-disk-blocks External Hard-disk showing Input/Output error up vote 1 down vote favorite I have a 1TB External Hard drive which I'm currently not able to access. When I open the External drive in Finder, It shows it's empty. When I use the option to "Get Info", I get the dialog box stating it has about 300GB Free. I tried to access External Drive using Terminal, but I had no luck. Checking in Disk Utility, http://apple.stackexchange.com/questions/147869/external-hard-disk-showing-input-output-error It showed that I have many number of files but ZERO folders. I tried to "repair disk", in the process the external Drive got unmounted in the process. I checked this drive on Windows. I was able to open almost all the folders but I wasn't able to copy anything onto the external drive. One folder caused my windows computer to freeze. Then I connected the drive back onto my MacBook Pro and tried to access the drive through terminal (this time it worked!) and then I tried to delete a folder with rm command, I got an "input/output error". I tried to enter in to the folder with "cd" command but my terminal got frozen. What should i do to recover the files in that folder? What can I do to fix my External Hard disk ? terminal finder hard-drive external-disk share|improve this question asked Oct 1 '14 at 4:45 Jash Jacob 2,76541939 add a comment| 1 Answer 1 active oldest votes up vote 3 down vote accepted If Windows is having trouble opening various folders and is causing your drive to freeze, it suggests that the file system is corrupted or that the disk itself is failing. The first thing you should do is run chkdsk on the drive from a Windows syst
a crash of the video application. How to Detect an I/O Error It's easy to verify whether a file has I/O problems: Just try to copy it to a different location. If the operating system reports an error (Finder error -36 for Mac) http://aeroquartet.com/wordpress/2012/06/06/how-to-copy-a-file-with-io-errors/ then we have an I/O error. I/O error means that the storage media (card, disk, …) cannot be read at a certain location. Think of it as a scratch on a DVD or a "bad sector" on a card or a disk. The bad news is that this "rough spot" is in the middle of your file. If the "rough spot" is big (a big scratch on your DVD, hundreds or thousands of "bad sectors" on your disk), then the chances output error of recovery will be low. But in any case, the first step is to generate a clean, error-free copy of the damaged file. Since some segments of the file are not readable, the best that can be done is to skip them. We will explain later how to do this. With a clean copy of the file, parts of the original data are missing, but we no longer have I/O errors causing our diagnostics and repair tools to choke and crash. How input output error to Copy a File with I/O Errors To salvage all readable data, we will use a fault-tolerant copy utility called dd. dd stands for "disk duplication". This is a command-line utility bundled with Mac OS X. A free version for Windows is also available for download. Be extremely careful, even if you are familiar with command line, because dd can cause unrecoverable damage to your data if you don't specify correctly input and output. You have been warned. The arguments of dd are straight-forward: if=path_of_file_with_IO_errors specifies input path of=path_of_clean_copy_to_create specifies output path conv=noerror,sync tells dd to be fault-tolerant Your output path should not be on the same disk as the damaged file. Actually, you shouldn't continue using the card or disk with I/O errors, because it's likely to cause more problems in the future. After recovery the data, you should scrap it or at most use it to store unimportant stuff. Using the Clean Copy Due to I/O errors, dd can take more time to create the clean copy than a normal copy would take. But it's really worth the wait, because now we have a clean file on which we can use our arsenal of diagnostics, preview and video recovery tools. I/O errors are a serious business, and scrapping the card after recovering the videos is probably the RIGHT THING TO DO. You should also consider that some amount of footage won't be recovered, or with a less-than-stellar quality. But