I tried ejecting the disc, and got an error that it could not unmount. To do this, restart your Mac and hold "Shift" while it's booting. It seems to work fine, but when I ran Disk Utility and did a "Verify Disk", it reported filesystem errors. share|improve this answer answered Jan 10 '15 at 3:17 Travis 91 add a comment| up vote 0 down vote Read somewhere about trying to click Repair several times until it worked.
What are the drawbacks of the US making tactical first use of nuclear weapons against terrorist sites? And when I did "exit", I saw error message "disk0s2: I/O error" followed by "CPU Halted". Safe Mode, sometimes called "Safe Boot," contains an automatic startup check and repair that can fix these problems. What precisely differentiates Computer Science from Mathematics in theoretical context?
You can reboot your Mac at this point. Checking catalog hierarchy. (It should be 28985392 instead of 28450688) File system check exit code is 8. After this demonstration, they went to the building manager to discuss the problem. Disk Utility Error 254 As it encounters bad sectors in normal use, it silently attempts to recover the data and move it to a chunk of spare sectors that all drives have for this purpose.
If so, then the disk is dying, replace the hard drive, and hope your backups are recent... (You do have backups/)... Disk Utility Error 5341 Additionally Time Machine data may not work after the copy. That is good information. Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site (the association bonus does not count).
Reply With Quote 01-21-2015,06:22 PM #3 pigoo3 View Profile View Forum Posts Member Since May 20, 2008 Location U.S. Helpful (0) Reply options Link to this post by Moosbrugger, Moosbrugger Nov 19, 2014 11:51 AM in response to Moosbrugger Level 1 (9 points) Apple Pay Nov 19, 2014 11:51 AM Disk Utility Error Code 8 It is my external drive I use for backups Helpful (0) Reply options Link to this post by Moosbrugger, Moosbrugger Nov 19, 2014 10:44 AM in response to ryanfrompoulsbo Level 1 Disk Utility Error Couldn't Open Device Browse other questions tagged mavericks disk-utility external-disk or ask your own question.
So, USE IT AT YOUR OWN RISK! [crarko adds: Consider this hint to also serve as a reminder to check your backups...]Possible problems: Your HD Volume/FileSystem is corrupted Verification: Use Disk http://applecountry.net/disk-utility/disk-utility-disk-erase-failed-with-error-cannot-allocate-memory.php If the copying breaks TM then your left with loss of all of your TM back up data. Volume check Failed. Here are some situations in which fsck may be necessary.Your Mac OS X disc isn't available.Your optical drive isn't available.You can't start with a Safe Boot by holding the Shift key Disk Utility Error Couldn't Unmount Disk
Helpful (0) Reply options Link to this post by dso371, dso371 Jan 1, 2015 2:58 AM in response to daxelrad Level 1 (16 points) Mac OS X Jan 1, 2015 2:58 Once they appeared, the popup came back saying they needed to be formatted. Enter Your Email Here to Get Access for Free:Go check your email! http://applecountry.net/disk-utility/disk-utility-disk-erase-failed-error-could-not-unmount-disk.php Is there a way to prove that HTTPS is encrypting the communication with my site?
But it might as well be Yosemite corrupting the drives... Disk Utility Error 22 If a system is under warranty then fine, ask an AASP or Genius Bar to replace the drive. Every manufacturer names it different, but as long as is supplies power from the battery if the power it low, then that's the one you want.
The above steps should only be necessary if you're experiencing errors with your Mac. I've got a 3 tb Western Digital My Book Studio external drive that I use for backups. Run First Aid in Recovery Mode RELATED ARTICLE8 Mac System Features You Can Access in Recovery Mode Ideally, that should be the end of it -- especially if you used the Disk Utility Error 22 Invalid Argument I tried disc verify and disc repair, and got similar errors -- that the disc could not unmount.
You should see messages like these during the disk check: ** /dev/rdisk0s3 (NO WRITE) ** Root file system ** Checking HFS Plus volume. ** Checking Extents Overflow file. ** Checking Catalog Learn moreSee these articles as well: Handling "overlapped extent allocation" errors reported by Disk Utility of fsck Disk Utility incorrectly reports disk errors on startup volume (disk) Resolve startup issues and share Share on Twitter Share on Facebook Email Link Like + Quote Reply mikecwest, Nov 17, 2014 mikecwest macrumors 6502a Joined: Jul 7, 2013 #2 Hrothgar said: ↑ I'm not sure get redirected here There will be a SMART status code logged, but OS X doesn't seem to regard this as an issue worth reporting.
Zeroing out is a viable option that can have good results. [ Reply to This | # ] Miniguide to fixing Volume-Filesystem errors Authored by: Doc-Izzy on Apr 29, '11 10:51:44AM Seems to work fine beside this error and stuck backups.