Circle Slash "Do Not Enter" on boot after iDefrag

I ran iDefrag last night because my MBP was running sooooo slow. I barely ever use it and it has 300 GB of free space. I used to use OnyX to optimise the disks on Snow Leopard but I didn't see that option in Lion. I let iDefrag run and went to sleep. This morning I woke up to the Do Not Enter sign and the spinning thing below it. I made sure I left it plugged in so I don't understand what happened.
How do I fix this and not lose my data?

boblaudermilk wrote:
I ran iDefrag last night because my MBP was running sooooo slow. I barely ever use it and it has 300 GB of free space. I used to use OnyX to optimise the disks on Snow Leopard but I didn't see that option in Lion. I let iDefrag run and went to sleep. This morning I woke up to the Do Not Enter sign and the spinning thing below it. I made sure I left it plugged in so I don't understand what happened.
How do I fix this and not lose my data?
Despite some software developers claims, Macs do not require defraging and therefore the cause of the system slow down will be found elsewhere. It sounds, unfortunately, that your HDD may have been ready to die and iDrag just put the final nail in it. Unless you can get it to mount by repairing it with something like DiskWarrior, then I would think, given that it sounds like you have no backup, that you may be in some trouble here. Do you have any form of backups?
Pete

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Last edited by marttt (2013-06-01 20:59:55)

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Kurt Lang wrote:
OS X doesn't need repair
Please tell me you don't seriously mean this. There is no file system in existence that will not have at least the occasional problem.
Right, and Disk Utility is there for that purpose.
Outside of corrupted caches that the free OnyX takes care of, one doesn't need anything more really.
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And Disk Utility is there for that too.
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Hi Arkku , and a warm welcome to the forums!
I'd certainly give Sig's advice a try first.
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applesetupdone...
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Windowsupdate(1)
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According to the log files, no actuate clue can be found.
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Note: Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.
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Last edited by bolshevik (2011-12-16 14:31:19)

bolshevik wrote:
Not sure what went wrong here. Pacman seemed to hang when updating, so I CTRL-C'd it and restarted the upgrade. It seemed to complete properly. That was a few hours ago and I did not immediately reboot the computer but went on with my work instead. After rebooting the laptop I get this
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Please type in the full path name to try again or press ENTER to boot the system: _
Pressing ENTER at this point results in mean looking error message :
ERROR : Unable to determine major/minor number of root device '/dev/sda4'
You are being dropped to a recovery shell
Type 'exit' to try and continue booting
sh: can't access tty: job control turned off
[ramfs /]# _
**typing exit**
Trying to continue (this will most likely fail)...
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You are being dropped into an emergency shell
sh: can't access tty: job control turned off
[ramfs /]# _
Did I somehow ruin my install or is there something I can do?
EDIT : Oh and it can still boot the windows partition, so it's not likely due to defective hardware.
If you foolishly interrupted the initramfs creation after a kernel upgrade and didn't regenerate it manually, you earned this.
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I am working to help a colleague that gets a "Do Not Enter" sing on boot-up of an iMac that was purchased through the university that we work with. From reading other posts, it was suggested that we re-install the OS to overcome the issue; on the assumption it is created by a corrupt file. This has proven not to work and we still get the same "Prohibited" sign during the start-up process. When Disk Utility is run, the boot sectors appear to fine and do not require specific repairs. Disk permissions were also repaired, but neither process has helped or corrected the problem. I am curious if others have encountered this issue and whether there is an easy work around? I came across one potential cause/solution - a bad SATA cable - however, I am unclear how the recovery disk could boot and run if the IO cable was bad, or even if the HDD was failing and working only intermittently. Any help/solution would be much appreciated. Thanks.

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What is your current Flash Player version: http://helpx.adobe.com/flash-player/kb/installation-problems-flash-player-windows.html ?
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Circle Slash "Do Not Enter" on boot after iDefrag

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