Problems Mac Recognizing BOOTCAMP - Unable to Mount the disk

Discussion in 'Windows, Linux & Others on the Mac' started by SteveGe, Dec 26, 2010.

  1. SteveGe, Dec 26, 2010
    Last edited: Dec 26, 2010

    SteveGe macrumors newbie

    Dec 26, 2010
    I can boot into bootcamp with no problems. I have been wanting to be able to open the bootcamp in Parallels. However, something is causing problems and I haven't been able to find a good answer in all my searching.

    Here is the issue:

    1. the partition 'disk0s3' is greyed out in Disk Utility. It is not mounted. Mounting does nothing.
    2. for reference, the Windows 7 IS formatted as NTFS. It is a Windows 7 64-bit install
    3. verify disk does the following:

    Verifying volume “disk0s3”
    ** /dev/disk0s3
    Invalid BS_jmpBoot in boot block: efbbbf
    Error: This disk needs to be repaired. Click Repair Disk.

    4. repairing does the following:
    Verify and Repair volume “disk0s3”
    ** /dev/disk0s3
    Invalid BS_jmpBoot in boot block: efbbbf
    Volume repair complete.Updating boot support partitions for the volume as required.Error: 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.

    Here is my last problem: I have stuff on the Windows partition that I don't want deleted.

    I'm really stuck on this -obviously, I can just continue to boot into bootcamp, I just would rather open it from Parallels. I'm not sure what or if I made some mistake in setting up Bootcamp, I thought I followed the directions to the t. I do know I formatted the partition as NTFS during the install - as I think Windows 7 requires it.

    I have tried installing NTFS-3G - it is installed, but didn't do any good when trying to mount the drive.


    diskutil list /dev/disk0
    0: GUID_partition_scheme *1.0 TB disk0
    1: EFI 209.7 MB disk0s1
    2: Apple_HFS Macintosh HD 779.5 GB disk0s2
    3: Microsoft Basic Data 220.3 GB disk0s3

    diskutil info /dev/disk0s3
    Device Identifier: disk0s3
    Device Node: /dev/disk0s3
    Part Of Whole: disk0
    Device / Media Name: BOOTCAMP

    Volume Name:
    Escaped with Unicode:

    Mounted: No

    File System: MS-DOS
    Type: msdos
    Name: MS-DOS (FAT)

    Partition Type: Microsoft Basic Data
    Bootable: Is bootable
    Media Type: Generic
    Protocol: SATA
    SMART Status: Verified

    Total Size: 220.3 GB (220322594816 Bytes) (exactly 430317568 512-Byte-Blocks)
    Volume Free Space: 0 B (0 Bytes) (exactly 0 512-Byte-Blocks)

    Read-Only Media: No
    Read-Only Volume: Not applicable (not mounted)
    Ejectable: No

    Whole: No
    Internal: Yes
  2. balamw, Dec 26, 2010
    Last edited: Dec 26, 2010

    balamw Moderator


    Staff Member

    Aug 16, 2005
    New England
    My guess is that your GPT and MBR partition tables are out of sync. There is a tool called GPT fdisk (gdisk) that can help you correct this.

    I'm on my iPad so it's harder for me to find the link, search the forum for gdisk.

    EDIT: Back on the Mac.

  3. SteveGe thread starter macrumors newbie

    Dec 26, 2010
  4. SteveGe thread starter macrumors newbie

    Dec 26, 2010
    Ok, I got the program installed, etc...

    I am seeing this:

    sudo gdisk -l /dev/disk0
    GPT fdisk (gdisk) version 0.6.13

    Partition table scan:
    MBR: hybrid
    BSD: not present
    APM: not present
    GPT: present

    Found valid GPT with hybrid MBR; using GPT.
    Disk /dev/disk0: 1953525168 sectors, 931.5 GiB
    Logical sector size: 512 bytes
    Disk identifier (GUID): 957C9DC5-E962-4F84-9087-5DE986090A5D
    Partition table holds up to 128 entries
    First usable sector is 34, last usable sector is 1953525134
    Partitions will be aligned on 8-sector boundaries
    Total free space is 265581 sectors (129.7 MiB)

    Number Start (sector) End (sector) Size Code Name
    1 40 409639 200.0 MiB EF00 EFI System Partition
    2 409640 1522941991 726.0 GiB AF00 Customer
    3 1523206144 1953523711 205.2 GiB 0700 BOOTCAMP

    Is there a certain command I need to execute?
  5. SteveGe thread starter macrumors newbie

    Dec 26, 2010
    That link talks about reformatting the partition, etc... is that basically my only option is to reformat ?

    I was hoping not to have to blow away the partition. I think if given that choice, I might just try creating a new Parallels instance.

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