Macintosh HD gone?

While recently trying to fix an error in my Macbook Pro I was forced to reset my Macbook Pro to its factory settings. While clearing out the old HD (via the install disk utility area) I got an error just as it finished and next thing I know the whole "Macintosh HD" drive was gone with only the main "250 GB Hitachi, etc" drive and it won't let me install my OS into it.
Is there anyway to fix this? Or am I forced to head to my local Apple store before my one year warranty goes off (I'm currently in the 11th month of owning this).

Ecomics21 wrote:
While clearing out the old HD (via the install disk utility area) I got an error just as it finished and next thing I know the whole "Macintosh HD" drive was gone with only the main "250 GB Hitachi, etc" drive and it won't let me install my OS into it.
Where do I do that from the OSX install screen?
Sorry, this is only my first year on this OS
Same as above ("via the install disk utility area.")
Install DVD>Utilities>DiskUtility>250 GB Hitach>Partition
1 Partiton
Name: Macintosh HD
Formate: Mac OS Extended (journeled)
options> GUID partition table
apply

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Hi naxpal and welcome to Apple Discussions,
As I was reading through your post I was noticing that I also had a problem similar to that about a month ago. The only thing different is that my Macintosh HD was there (where the OS was installed), but my second partition volume disappeared. I was wondering when it happened if my data was gone for ever, but it took me a few days to figure out what to do:
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Here's the disk information. How do I proceed now?
Allans-MBP:~ amelsen$ diskutil list
/dev/disk0
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *500.3 GB   disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2:          Apple_CoreStorage                         301.4 GB   disk0s2
   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3
   4:       Microsoft Basic Data                         121.0 GB   disk0s4
/dev/disk1
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                  Apple_HFS Macintosh HD           *301.0 GB   disk1
                                 Logical Volume on disk0s2
                                 0D458993-DCFE-4CEC-AD87-F7AAF0780210
                                 Unencrypted
Allans-MBP:~ amelsen$ diskutil list
/dev/disk0
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *500.3 GB   disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2:          Apple_CoreStorage                         301.4 GB   disk0s2
   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3
   4:       Microsoft Basic Data                         121.0 GB   disk0s4
/dev/disk1
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                  Apple_HFS Macintosh HD           *301.0 GB   disk1
                                 Logical Volume on disk0s2
                                 0D458993-DCFE-4CEC-AD87-F7AAF0780210
                                 Unencrypted
Allans-MBP:~ amelsen$ diskutil cs list
CoreStorage logical volume groups (1 found)
|
+-- Logical Volume Group 065D5266-B821-4E9D-9EDD-BBAA2937C6F7
    =========================================================
    Name:         Macintosh HD
    Status:       Online
    Size:         301421056000 B (301.4 GB)
    Free Space:   18894848 B (18.9 MB)
    |
    +-< Physical Volume 71BCFB68-BD4F-4658-901E-8E986B1228B4
    |   ----------------------------------------------------
    |   Index:    0
    |   Disk:     disk0s2
    |   Status:   Online
    |   Size:     301421056000 B (301.4 GB)
    |
    +-> Logical Volume Family 1B31E856-7244-4A25-ABC5-AD116C4D0DF7
        Encryption Status:       Unlocked
        Encryption Type:         None
        Conversion Status:       NoConversion
        Conversion Direction:    -none-
        Has Encrypted Extents:   No
        Fully Secure:            No
        Passphrase Required:     No
        |
        +-> Logical Volume 0D458993-DCFE-4CEC-AD87-F7AAF0780210
            Disk:                  disk1
            Status:                Online
            Size (Total):          301049839616 B (301.0 GB)
            Conversion Progress:   -none-
            Revertible:            Yes (no decryption required)
            LV Name:               Macintosh HD
            Volume Name:           Macintosh HD
            Content Hint:          Apple_HFS
Allans-MBP:~ amelsen$ sudo gpt -vv -r show /dev/disk0
WARNING: Improper use of the sudo command could lead to data loss
or the deletion of important system files. Please double-check your
typing when using sudo. Type "man sudo" for more information.
To proceed, enter your password, or type Ctrl-C to abort.
Password:
gpt show: /dev/disk0: mediasize=500277790720; sectorsize=512; blocks=977105060
gpt show: /dev/disk0: Suspicious MBR at sector 0
gpt show: /dev/disk0: Pri GPT at sector 1
gpt show: /dev/disk0: Sec GPT at sector 977105059
      start       size index contents
          0          1         MBR
          1          1         Pri GPT header
          2         32         Pri GPT table
         34          6
         40     409600      1 GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B
     409640 588713000      2 GPT part - 53746F72-6167-11AA-AA11-00306543ECAC
589122640    1269536      3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC
590392176 150385808
740777984 236326912      4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7
977104896        131
977105027         32         Sec GPT table
977105059          1         Sec GPT header
Allans-MBP:~ amelsen$ sudo fdisk /dev/disk0
Disk: /dev/disk0 geometry: 60821/255/63 [977105060 sectors]
Signature: 0xAA55
         Starting       Ending
#: id cyl hd sec - cyl hd sec [     start -       size]
1: EE 1023 254 63 - 1023 254 63 [         1 -     409639] <Unknown ID>
2: AC 1023 254 63 - 1023 254 63 [    409640 - 588713000] <Unknown ID>
3: AB 1023 254 63 - 1023 254 63 [ 589122640 -    1269536] Darwin Boot
4: 0C 1023 254 63 - 1023 254 63 [ 740777984 - 236326912] Win95 FAT32L
Allans-MBP:~ amelsen$
Thanks for your help...

The gap between GPT3 and GPT4 (roughly 80GB) is where you should be able to find your 'lost' Windows partition.
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