Cp Input Output Error Os X
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Could Not Restore Input Output Error Mac Os X
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Input Output Error Mac External Hard Drive
identify and fix files with corrupted / inaccessible 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
How To Find Corrupt Files On Mac
error code of 5 when accessing the files. Picking one at random and 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
a title. You can not post a blank message. Please type your message and try again. Sergio_boston Level 1 (0 points) Q: Input / Output error while copying files I am having problems with an external WD 500 GB hard drive.The how to fix corrupted files on mac drive has 2 partitions, #1: 184 GB, #2: 315 GBPartion 1 does not
Input Output Error Mac Disk Utility
mout (even with DU), however most of the important data is on partion #2I am able to recover part of the fix corrupt files mac free files using the copy command on Terminal.however, many of the files can't be copied due to an input/output error, and these files end up as zero bites files on the target disk (the correct http://apple.stackexchange.com/questions/129030/how-to-identify-and-fix-files-with-corrupted-inaccessible-disk-blocks size shows on the source disk though)I also trying copying the problem files individualy with the same results (zero bytes and input/output error).I think the problem may be due to bad sectors on the external drive, but I don't have any idea on how to fix it.I wonder if deleting from the source drive those files already copied to the target drive and moving the problematic files to another https://discussions.apple.com/thread/3491867?tstart=0 directory may help to solve the problem. Is there any Terminal command to move files from bad sectors to good sectors?Thanks! MacBook Pro, Mac OS X (10.7.2), 3.06 Ghz Intel Core 2 - 8 GB RAM Posted on Nov 14, 2011 8:06 AM I have this question too This site contains user submitted content, comments and opinions and is for informational purposes only. Apple may provide or recommend responses as a possible solution based on the information provided; every potential issue may involve several factors not detailed in the conversations captured in an electronic forum and Apple can therefore provide no guarantee as to the efficacy of any proposed solutions on the community forums. Apple disclaims any and all liability for the acts, omissions and conduct of any third parties in connection with or related to your use of the site. All postings and use of the content on this site are subject to the Apple Support Communities Terms of Use. Support Apple Support Communities Shop the Apple Online Store (1-800-MY-APPLE), visit an Apple Retail Store, or find a reseller. Apple Info Site Map Hot News RSS Feeds Contact Us Copyright © Apple Inc. All rights reserved. Terms of Use Updated Privacy Policy Cookie Usage
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 http://aeroquartet.com/wordpress/2012/06/06/how-to-copy-a-file-with-io-errors/ an error (Finder error -36 for Mac) 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 input output on your DVD, hundreds or thousands of "bad sectors" on your disk), then the chances 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 input output error the original data are missing, but we no longer have I/O errors causing our diagnostics and repair tools to choke and crash. How 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 diagno