Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

Question:

Question: Bootcamp partition won't boot

Hi, after installing High Sierra, seems that my Windows partition wont boot again. Your help would be much appreciated again. Outputs as before:


CMJMac:~ alanjohnstone$ diskutil list

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *500.1 GB
disk0

1: EFI EFI 209.7 MB
disk0s1

2: Apple_APFS Container disk1 250.7 GB
disk0s2

3: Microsoft Basic Data SHARED 148.1 GB
disk0s3

4: Microsoft Basic Data BOOTCAMP 101.0 GB
disk0s4


/dev/disk1 (synthesized):

#: TYPE NAME SIZE IDENTIFIER

0: APFS Container Scheme - +250.7 GB
disk1

Physical Store disk0s2

1: APFS Volume Macintosh HD 181.4 GB
disk1s1

2: APFS Volume Preboot 18.3 MB disk1s2

3: APFS Volume Recovery 507.2 MB
disk1s3

4: APFS Volume VM 3.2 GB disk1s4


CMJMac:~ alanjohnstone$ diskutil cs list

No CoreStorage logical volume groups found

CMJMac:~ alanjohnstone$

CMJMac:~ alanjohnstone$ sudo gpt -vv -r show /dev/disk0

gpt show: /dev/disk0: mediasize=500107862016; sectorsize=512; blocks=976773168

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 976773167

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
489654544 2
GPT part - 7C3457EF-0000-11AA-AA11-00306543ECAC


490064184
289181384 3
GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7


779245568 262144


779507712
197265408 4
GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7


976773120 15


976773135 32 Sec GPT table


976773167 1 Sec GPT header

CMJMac:~ alanjohnstone$ sudo fdisk /dev/disk0

Disk: /dev/disk0 geometry: 60801/255/63 [976773168 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: FF 1023 254
63 - 1023 254
63 [ 409640 -
489654544] Xenix BBT

3: 0C 1023 254
63 - 1023 254
63 [ 490064184 -
289181384] Win95 FAT32L

4: 0C 1023 254
63 - 1023 254
63 [ 779507712 -
197265408] Win95 FAT32L

CMJMac:~ alanjohnstone$

MacBook, macOS High Sierra (10.13.3), (13-inch, Mid 2010)

Posted on

Reply
Question marked as Solved
Answer:
Answer:

Seems there is problem:


CMJMac:~ alanjohnstone$ sudo fdisk -e /dev/disk0

Password:

fdisk: could not open MBR file /usr/standalone/i386/boot0: No such file or directory

Enter 'help' for information

fdisk: 1>



















Posted on

Page content loaded

Mar 18, 2018 8:08 AM in response to Loner T In response to Loner T

Hi, its a 3-inch, Mid 2010 (a white one). I think the partitions were all created prior to to the Win install. You did help me fix this last time: Re: Bootcamp Boot Repair Partition to be fixed

CMJMac:~ alanjohnstone$ sudo dd if=/dev/rdisk0s4 count=1 2>/dev/null | hexdump -C

Password:

00000000
eb 52 90 4e 54 46 53 20
20 20 20 00 02 08 00 00
|.R.NTFS .....|

00000010
00 00 00 00 00 f8 00 00
3f 00 ff 00 00 58 76 2e
|........?....Xv.|

00000020
00 00 00 00 80 00 80 00
80 16 b3 0b 00 00 00 00
|................|

00000030
00 00 0c 00 00 00 00 00
02 00 00 00 00 00 00 00
|................|

00000040
f6 00 00 00 01 00 00 00
0b f6 70 1c 3d 71 1c 7a
|..........p.=q.z|

00000050
00 00 00 00 fa 33 c0 8e
d0 bc 00 7c fb 68 c0 07
|.....3.....|.h..|

00000060
1f 1e 68 66 00 cb 88 16
0e 00 66 81 3e 03 00 4e
|..hf......f.>..N|

00000070
54 46 53 75 15 b4 41 bb
aa 55 cd 13 72 0c 81 fb
|TFSu..A..U..r...|

00000080
55 aa 75 06 f7 c1 01 00
75 03 e9 dd 00 1e 83 ec
|U.u.....u.......|

00000090
18 68 1a 00 b4 48 8a 16
0e 00 8b f4 16 1f cd 13
|.h...H..........|

000000a0
9f 83 c4 18 9e 58 1f 72
e1 3b 06 0b 00 75 db a3
|.....X.r.;...u..|

000000b0
0f 00 c1 2e 0f 00 04 1e
5a 33 db b9 00 20 2b c8
|........Z3... +.|

000000c0
66 ff 06 11 00 03 16 0f
00 8e c2 ff 06 16 00 e8
|f...............|

000000d0
4b 00 2b c8 77 ef b8 00
bb cd 1a 66 23 c0 75 2d
|K.+.w......f#.u-|

000000e0
66 81 fb 54 43 50 41 75
24 81 f9 02 01 72 1e 16
|f..TCPAu$....r..|

000000f0
68 07 bb 16 68 52 11 16
68 09 00 66 53 66 53 66
|h...hR..h..fSfSf|

00000100
55 16 16 16 68 b8 01 66
61 0e 07 cd 1a 33 c0 bf
|U...h..fa....3..|

00000110
0a 13 b9 f6 0c fc f3 aa
e9 fe 01 90 90 66 60 1e
|.............f`.|

00000120
06 66 a1 11 00 66 03 06
1c 00 1e 66 68 00 00 00
|.f...f.....fh...|

00000130
00 66 50 06 53 68 01 00
68 10 00 b4 42 8a 16 0e
|.fP.Sh..h...B...|

00000140
00 16 1f 8b f4 cd 13 66
59 5b 5a 66 59 66 59 1f
|.......fY[ZfYfY.|

00000150
0f 82 16 00 66 ff 06 11
00 03 16 0f 00 8e c2 ff
|....f...........|

00000160
0e 16 00 75 bc 07 1f 66
61 c3 a1 f6 01 e8 09 00
|...u...fa.......|

00000170
a1 fa 01 e8 03 00 f4 eb
fd 8b f0 ac 3c 00 74 09
|............<.t.|

00000180
b4 0e bb 07 00 cd 10 eb
f2 c3 0d 0a 41 20 64 69
|............A di|

00000190
73 6b 20 72 65 61 64 20
65 72 72 6f 72 20 6f 63
|sk read error oc|

000001a0
63 75 72 72 65 64 00 0d
0a 42 4f 4f 54 4d 47 52
|curred...BOOTMGR|

000001b0
20 69 73 20 63 6f 6d 70
72 65 73 73 65 64 00 0d
| is compressed..|

000001c0
0a 50 72 65 73 73 20 43
74 72 6c 2b 41 6c 74 2b
|.Press Ctrl+Alt+|

000001d0
44 65 6c 20 74 6f 20 72
65 73 74 61 72 74 0d 0a
|Del to restart..|

000001e0
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
|................|

000001f0
00 00 00 00 00 00 8a 01
a7 01 bf 01 00 00 55 aa
|..............U.|

00000200

CMJMac:~ alanjohnstone$

Mar 18, 2018 8:08 AM

Reply Helpful

Mar 18, 2018 8:23 AM in response to amj.62 In response to amj.62

The last entry in the MBR needs to be marked bootable.You may need to disable SIP, and if you need the steps, let me know. To mark the last entry bootable, we can use (ignore the 386 MBR error).


sudo fdisk -e /dev/disk0

p

setpid 4

07

flag 4

p

w

y



Reboot and test.

Mar 18, 2018 8:23 AM

Reply Helpful
Question marked as Solved

Mar 18, 2018 8:39 AM in response to Loner T In response to Loner T

Seems there is problem:


CMJMac:~ alanjohnstone$ sudo fdisk -e /dev/disk0

Password:

fdisk: could not open MBR file /usr/standalone/i386/boot0: No such file or directory

Enter 'help' for information

fdisk: 1>



















Mar 18, 2018 8:39 AM

Reply Helpful
User profile for user: amj.62

Question: Bootcamp partition won't boot