Problem:
When holding down alt on boot, I can only see my windows partition, and I can only boot to Windows 8.1.
Process To Get To Problem:
Brand new Samsung 840 Pro SSD installed,
Made USB Installer for Mavericks,
After installing, I immediately ran bootcamp at 50/50 partition, with win 8.1 installer on a USB flash drive ready.
Once both were installed, I primarily used windows 8.1, and ran Samsung Magician with the aim to test and improve performance.
I enabled Rapid mode, and over provisioning.
And now I cannot boot to Mac OS X.
I've tried:
I'm currently typing this on a USB boot of the drive I removed from my iMac, and can see in Disk Utility that the drive is visible, and appears to have 3 partitions that are all dismounted, and read out as "disk0s2", "disk0s3" and "disk0s4"... these are greyed out texts under the hardware name of the drive: "512.11 GB Samsung SSD PRO Series Media"
If I select the drive (not the partitions) and click "Repair Disk", the log box populates, and a pop up says,
If I select "disk0s2", and press 'Repair Disk', the log box populates, and a pop up says,
The same happens for the other partitions, except "disk0s4"'s log appears as:
I'm really stuck, and hoping for some expert advice.
I'm familiar with terminal commands, and very confidant with making alterations. I'm sure theres some terminal command I could enter to fix all this, right?
When holding down alt on boot, I can only see my windows partition, and I can only boot to Windows 8.1.
Process To Get To Problem:
Brand new Samsung 840 Pro SSD installed,
Made USB Installer for Mavericks,
After installing, I immediately ran bootcamp at 50/50 partition, with win 8.1 installer on a USB flash drive ready.
Once both were installed, I primarily used windows 8.1, and ran Samsung Magician with the aim to test and improve performance.
I enabled Rapid mode, and over provisioning.
And now I cannot boot to Mac OS X.
I've tried:
- Disabling Rapid mode, and over provisioning.
- Running Disk Utility from USB Installer. Couldn't run 'Repair Disk', it gave some error message about backing up my data asap, and then formatting the drive.
- Reinstalling Mac OS X. But upon clicking install, just after verifying with Apple, it tells me to contact AppleCare.
I'm currently typing this on a USB boot of the drive I removed from my iMac, and can see in Disk Utility that the drive is visible, and appears to have 3 partitions that are all dismounted, and read out as "disk0s2", "disk0s3" and "disk0s4"... these are greyed out texts under the hardware name of the drive: "512.11 GB Samsung SSD PRO Series Media"
If I select the drive (not the partitions) and click "Repair Disk", the log box populates, and a pop up says,
The log then reads as:"Alert
Partition map repair failed file system check while creating loader space for a data partition. You should repair that specific partition and then try repairing the partition map again."
Verifying and repairing partition map for Samsung SSD 840 PRO Series Media
Checking prerequisites
Checking the partition list
Adjusting partition map to fit whole disk as required
Checking for an EFI system partition
Checking the EFI system partitions size
Checking the EFI system partitions file system
Checking all HFS data partition loader spaces
Preparing to create trailing loader space by shrinking the volume on disk0s4
Creating loader space, part 1 of 3: Verifying the file system
Problems were encountered during repair of the partition map
Error: Partition map repair failed file system check while creating loader space for a data partition. You should repair that specific partition and then try repairing the partition map again.
If I select "disk0s2", and press 'Repair Disk', the log box populates, and a pop up says,
The log then reads:Disk Utility stopped repairing "disk0s2"
Disk Utility can't repair this disk. back up as many of your files as possible, reformat the disk, and restore your backed-up files.
Verify and Repair volume disk0s2
Checking file system** /dev/disk0s2
Invalid BS_jmpBoot in boot block: 000000
Volume repair complete.
Updating boot support partitions for the volume as required.
Error: Disk Utility cant repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files.
The same happens for the other partitions, except "disk0s4"'s log appears as:
The messages otherwise appear the same...Verify and Repair volume disk0s4
Checking file systemVolume repair complete.
Updating boot support partitions for the volume as required.
Error: Disk Utility cant repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files.
I'm really stuck, and hoping for some expert advice.
I'm familiar with terminal commands, and very confidant with making alterations. I'm sure theres some terminal command I could enter to fix all this, right?