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Level 1

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Windows partition corrupt or unbootable after Yosemite upgrade

My windows bootcamp partition no longer shows up as an option to boot to when hitting "alt/option" while starting.

Reads in disk utility as "disk0s4" and says can't repair disk. How do I recover or backup files?

Last login: Sun Jul 12 15:04:51 on console

tests-MacBook-Pro:~ johntcreedonjr1$ diskutil list

/dev/disk0

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *320.1 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_CoreStorage 135.1 GB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3

4: Microsoft Basic Data 159.7 GB disk0s4

/dev/disk1

#: TYPE NAME SIZE IDENTIFIER

0: Apple_HFS Macintosh HD *134.8 GB disk1

Logical Volume on disk0s2

0EB5178D-45CE-4F4C-B367-86A984984B26

Unencrypted

/dev/disk2

#: TYPE NAME SIZE IDENTIFIER

0: Apple_partition_scheme *16.8 MB disk2

1: Apple_partition_map 32.3 KB disk2s1

2: Apple_HFS Flash Player 16.8 MB disk2s2

tests-MacBook-Pro:~ johntcreedonjr1$ diskutil cs list

CoreStorage logical volume groups (1 found)

|

+-- Logical Volume Group A976A795-6083-435C-9497-53BD967AAE54

=========================================================

Name: Macintosh HD

Status: Online

Size: 135135137792 B (135.1 GB)

Free Space: 18911232 B (18.9 MB)

|

+-< Physical Volume CF9A9FD2-9DA9-49B2-9467-EB4F541DA9E6

| ----------------------------------------------------

| Index: 0

| Disk: disk0s2

| Status: Online

| Size: 135135137792 B (135.1 GB)

|

+-> Logical Volume Family 27AB8FB5-EA5B-41E9-8703-42FFC7B025BD

----------------------------------------------------------

Encryption Status: Unlocked

Encryption Type: None

Conversion Status: NoConversion

Conversion Direction: -none-

Has Encrypted Extents: No

Fully Secure: No

Passphrase Required: No

|

+-> Logical Volume 0EB5178D-45CE-4F4C-B367-86A984984B26

---------------------------------------------------

Disk: disk1

Status: Online

Size (Total): 134763905024 B (134.8 GB)

Conversion Progress: -none-

Revertible: Yes (no decryption required)

LV Name: Macintosh HD

Volume Name: Macintosh HD

Content Hint: Apple_HFS

tests-MacBook-Pro:~ johntcreedonjr1$ sudo gpt -w -r show /dev/disk0

When I tried the sudo commands, I entered the only password I recall having on this computer and it didn't work. Any idea how I can figure that out as well? My apologies, as I'm out of my element and don't really have any idea what I am doing here.

MacBook Pro, OS X Yosemite (10.10.1), null

Posted on Jul 18, 2015 1:44 PM

48 replies

Loner T

Level 9

59,471 points

Aug 27, 2015 5:38 AM in response to NovareRes

Please try using a wired connection. Wireless connections are not yet good enough for large downloads, especially if you are traveling. If you work with colleagues, ask if anyone has a Mac. There is a mode called Target Disk Mode - Share files between two computers with target disk mode - Apple Support - which can be used to diagnose your Mac.

NovareRes Author

Level 1

0 points

Aug 30, 2015 5:44 PM in response to Loner T

1.) Tried a wired connection and it didn't make a difference, it still said "try again later."

2.) I tried a number of different options and it looks like the only next step is to either a.) pay genius bar to reinstall my OS, or b.) purchase a new copy of yosemite, (no earlier versions of OS appear to be available any longer and I don't have any in my or my friend's purchase history,) and download it to my recovery external drive and boot from that to reinstall. If I do reinstall OS, (or a different version than the original,) in this way, will it erase or copy over my bootcamp partition? Again the priority is to save the files on the bootcamp partition. I'll go out and buy a new computer before I will risk deleting those files forever.

3.) I need to buy a cable in order to link the two cables. If I buy such a cable and link them, what would that help me accomplish? Would I somehow be able to copy over the bootcamp files in some way or is it just another way to try and boot the OS?

Thanks again for your patience and your time.

Loner T

Level 9

59,471 points

Aug 31, 2015 10:30 AM in response to NovareRes

If #3 is possible, then #1 and #2 are not necessary. It may be possible to fix OSX issues in TDM mode.

Windows partition corrupt or unbootable after Yosemite upgrade