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Please help! I think I've wiped my drive

S

studio81

macrumors member
Original poster
Jan 6, 2010
35
1
studio81 said:
I'm a moron. I was following these instructions:

http://wiki.openelec.tv/index.php/HOW-TO:Installing_OpenELEC/Writing_The_Disk_Image#tab=Mac_OSX

And I've somehow wiped my Mac drive, by using rdisk1 and/or rdisk2.

When I boot my Mac it can't find an operating system.

Am I screwed or is there anything I can do in recovery mode to fix it?

Please try not to laugh.

Posting from my iPhone so my research options are limited.
Click to expand...

Try this, reboot the computer while pressing the OPTION-key. You will see a screen showing the boot partitions. Do you see your hard drive listed? If you do select it and you should see your computer boot properly.
 
Taz Mangus said:
Try this, reboot the computer while pressing the OPTION-key. You will see a screen showing the boot partitions. Do you see your hard drive listed? If you do select it and you should see your computer boot properly.
Click to expand...
Thanks Taz, tried that. I enter my password (drive is encrypted) and get the loading progress bar which takes ages (it's usually quite quick). It gets to about half way then I get a white icon, circle with a line through it.
 
Disk utility in recover mode States:

Verify volume failed: unrecognised file system

The verify and repair disk buttons are greyed out but the microscope icon provides the above message.
 
studio81 said:
Thanks Taz, tried that. I enter my password (drive is encrypted) and get the loading progress bar which takes ages (it's usually quite quick). It gets to about half way then I get a white icon, circle with a line through it.
Click to expand...

Try rebooting while pressing the shift-key. This will boot into safe mode.

EDIT: I posted this at the same time your posted your post above.
 
studio81 said:
Disk utility in recover mode States:

Verify volume failed: unrecognised file system

The verify and repair disk buttons are greyed out but the microscope icon provides the above message.
Click to expand...

It looks like the partition got damaged. Hopefully you have a backup of your user data.
 
Thanks Taz, tried that now, twice. Same thing, prompt for password, slow progress bar, then halfway and I get the icon.
 
Cheers Taz, seems I'm out of luck then. I do have a backup but it will be a pain to restore, I was hoping to avoid it.

Oh well!

Thanks for your help
 
Ok I can't even reinstall the OS either! When I select the drive for install I get the error:

This disk doesn't use the GUiD partition table scheme. Use disk utility to change the partition scheme. Select the disk, choose the partition tab, select the volume scheme and then click options.

I try and follow those instructions but the options button is greyed out. Selecting erase results in the error:

Disk encryption failed
Disk encryption failed with the error:
Invalid attempt to unmount a whole disk containing a partition map

Not sure what to do now
 
OP wrote:
"I try and follow those instructions but the options button is greyed out. Selecting erase results in the error:
Disk encryption failed
Disk encryption failed with the error:
Invalid attempt to unmount a whole disk containing a partition map
Not sure what to do now"

I can't help you now, but I'll make a few suggestions for the future:
- Don't play with some terminal commands unless you absolutely know what results they will produce.
- Keep a bootable cloned backup made with either CarbonCopyCloner or SuperDuper. If you had one, you wouldn't be posting now.
- Don't use disk encryption unless you really REALLY need it.
 
studio81 said:
Ok I can't even reinstall the OS either! When I select the drive for install I get the error:

This disk doesn't use the GUiD partition table scheme. Use disk utility to change the partition scheme. Select the disk, choose the partition tab, select the volume scheme and then click options.

I try and follow those instructions but the options button is greyed out. Selecting erase results in the error:

Disk encryption failed
Disk encryption failed with the error:
Invalid attempt to unmount a whole disk containing a partition map

Not sure what to do now
Click to expand...
Okay... so you can get to the recovery screen then? Go back there and in the Utilities menu, open Terminal and enter the following two commands one after the other. Then come back here and post the output of those commands and we can help you.

What OS X version are you on?

Code: 
diskutil list

Code: 
diskutil cs list
 
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