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User profile for user: tomgrandson
tomgrandson Author
User level: Level 1
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Windows load problem after Yosemite upgrade (A disk read error occurred)

Hello,


I have a big problem, but i saw im not only one...I read some similar posts, but still not working. I really need a help:


I use MBP Retina early 2013. Few months ago installed a bootcamp partition, everything was good, but later i needed more space on bootcamp partition, i had to extend it manually (using some application on windows). After that i got disk0s4 on Disk Utility and i cant see my Windows files from OSX. I didnt care about this, windows load and boot normally.

After upgrade from 10.9 i cant see Windows disk when i turn on with ALT. I tried some ways from this community and only i made this partition bootable, so now when i started my mac with ALT i see selection between Macintosh HD and Windows. But unfortunatelly when i choose Windows i see: "A disk read error uccurred, Press Ctrl+Alt+Del to restart". What could i do now? If someone help me and write a little guide how to solve it I will be so thankful.


i guess i should attach some screens from terminal, but im not sure which information is necessary to solve this issue, please let me know.


Thanks in advance

Tom

MacBook Pro with Retina display, OS X Yosemite (10.10)

Posted on Oct 27, 2014 6:27 AM

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5 replies
User profile for user: tomgrandson
tomgrandson Author
User level: Level 1
0 points

Oct 27, 2014 2:17 PM in response to Loner T

Loner T, thanks for your anwswer,

Here're output of these commands:

diskutil list

/dev/disk0

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *751.3 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_CoreStorage 541.3 GB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3

4: Microsoft Basic Data 107.0 GB disk0s4

/dev/disk1

#: TYPE NAME SIZE IDENTIFIER

0: Apple_HFS Macintosh HD *540.9 GB disk1

Logical Volume on disk0s2

19DFF853-DB77-4DF8-9C71-D5C5A24C9EE0

Unlocked Encrypted

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

sudo gpt -vv -r show /dev/disk0

Password:

gpt show: /dev/disk0: mediasize=751277983744; sectorsize=512; blocks=1467339812

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 1467339811

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 1057233336 2 GPT part - 53746F72-6167-11AA-AA11-00306543ECAC

1057642976 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

1058912512 199444224

1258356736 208982016 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

1467338752 1027

1467339779 32 Sec GPT table

1467339811 1 Sec GPT header

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

sudo fdisk /dev/disk0

Disk: /dev/disk0 geometry: 91337/255/63 [1467339812 sectors]

Signature: 0xAA55

Starting Ending

#: id cyl hd sec - cyl hd sec [ start - size]

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

1: EE 0 0 2 - 25 127 14 [ 1 - 409639] <Unknown ID>

2: AF 25 127 15 - 1023 254 63 [ 409640 - 1057233336] HFS+

3: AB 1023 254 63 - 1023 254 63 [1057642976 - 1269536] Darwin Boot

*4: 07 1023 254 63 - 1023 254 63 [1258356736 - 208982016] HPFS/QNX/AUX

So what can we do now?

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Windows load problem after Yosemite upgrade (A disk read error occurred)

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