Mac Os X Input Output Error
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Input Output Error Mac External Hard Drive
Ask Question _ Ask Different is a question and answer site for power users of Apple hardware and software. Join them; it only disk utility input output error new image 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 disk how to find corrupt files on mac 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 trying
Input Output Error Mac Restore
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 go
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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 http://superuser.com/questions/777497/unable-to-create-disk-image-using-disk-utility-input-output-error 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 Unable to create disk image using disk utility (Input/output error) up vote 0 down vote favorite I want to create a disk image of source 100.03 output error GB Ext Hard Disk Media on destination 5TB Lacie ST5000DX000-1H2170 there is greater than 1TB remaining on the destination disk. The Disk Utility progress windows displays the message Creating Image Macintosh HD.dmg Reading whole disk (Apple_HFS : 0)… with progress bar that moves up to about 50% before the following error message is displayed: Unable to create Macintosh HD.dmg. (Input/output error). Using Disk Utility, First Aid, Verify Disk, the volume "Macintosh HD" appears to be OK. Is there a way to view any more input output error detail than the console will provide? So that I can learn more about the error. It could be due to low power on the source drive - I am using a 2.5" HDD External enclosure (Mini G2 from Silicon P/L) requires 5VDC/0.5A usb to USB and power (host usb 1 - enclosure usb and enclosure round power split end cable) lead and I am using my MacBook Pro Retina, 13-inch, Late 2012 as the host USB port. The HD inside the enclosure is from an early model G4 Powerbook that was running Tiger OS X. Other answers to input/output error suggest using DiskWarrior so I tried that, DiskWarrior fixed a bunch of flags and repaired permissions but when I ran disk utility again after that to create a new image it failed again for the same reason: input/output error. Using the terminal command (from http://hints.macworld.com/article.php?story=20050302225659382) dd bs=512 if=/dev/rXX# of=/some_dir/foo.dmg conv=noerror,sync does produce an image but after completion it could not be opened (or mounted) due to a "no mountable file system." mac external-hard-drive disk-utility share|improve this question edited Jul 6 '14 at 8:29 Jens Erat 9,015112946 asked Jul 6 '14 at 7:52 Jacob 103113 Sounds like you have an irreparable error on the disk. You may want to dd the disk using the switch that tells dd to continue upon errors. If dd fails at I/O errors then you may want to take it as a lesson to improve your backup strategy, as the data at the error p