The boot disk can not be partitioned or restored to a single partition.

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The boot disk can not be partitioned or restored to a single partition.

Hello, I bought a few days before the mac . I need to have windows to handle a scanner , so I tried Boot Camp . Unfortunately , I do not know how, but after several failed attempts , I found that Boot Camp does not work now and reports "The boot disk can not be partitioned or restored to a single partition . " I tried deleting the volumes added from windows , but it is likely that it has remained one for error ( EFI ). This is the current situation:

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *1.0 TB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_CoreStorage Macintosh HD 959.4 GB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3

4: EFI NO NAME 104.9 MB disk0s4

/dev/disk1 (internal):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme 24.0 GB disk1

1: EFI EFI 314.6 MB disk1s1

2: Apple_CoreStorage Macintosh HD 23.6 GB disk1s2

3: Apple_Boot Boot OS X 134.2 MB disk1s3

/dev/disk2 (internal, virtual):

#: TYPE NAME SIZE IDENTIFIER

0: Apple_HFS Macintosh HD +982.0 GB disk2

Logical Volume on disk1s2, disk0s2

79068DB8-F40B-4F92-A98D-20948AA81B80

Unencrypted Fusion Drive

I suppose the problem is the volume /dev/disk0s4. So it is?
Can I delete it with a control terminal?

iMac (Retina 5K, 27-inch, Late 2015), OS X El Capitan (10.11.1), Windows10

Posted on Dec 7, 2015 1:05 PM

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Answer 1

Best reply

Loner T

Level 9

59,471 points

Dec 11, 2015 1:17 PM in response to Joe Falco

1. What is the 24GB internal disk?

2. You may end up backing up OSX and erasing the internal drive in Internet Recovery and restoring from backup. The EFI 104.9 MB is a Windows EFI partition, which should not be there at all.

3. Before you make the next attempt, please run the following two procedures with all external storage disconnected.

Resetting the System Management Controller (SMC) on your Mac - Apple Support

How to Reset NVRAM on your Mac - Apple Support

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Answer 2

Joe Falco Author

Level 1

1 points

Dec 11, 2015 1:34 PM in response to Loner T

Hello, thank you for your help, but I've not solved my problem.

Well, I made an attempt installing IOS, but now I am more partitions.

Last login: Fri Dec 11 22:15:47 on ttys000

iMac:~ JoeFalco$ diskutil list

/dev/disk0 (internal):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme 24.0 GB disk0

1: EFI EFI 314.6 MB disk0s1

2: Apple_CoreStorage Macintosh HD 23.6 GB disk0s2

3: Apple_Boot Boot OS X 134.2 MB disk0s3

/dev/disk1 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *1.0 TB disk1

1: EFI EFI 209.7 MB disk1s1

2: Apple_CoreStorage Macintosh HD 959.4 GB disk1s2

3: Apple_Boot Recovery HD 650.0 MB disk1s3

4: EFI NO NAME 104.9 MB disk1s4

/dev/disk2 (internal, virtual):

#: TYPE NAME SIZE IDENTIFIER

0: Apple_HFS Macintosh HD +982.0 GB disk2

Logical Volume on disk0s2, disk1s2

6D68E56B-E03A-400E-8AA7-CA6C12E52185

Unencrypted Fusion Drive

Honestly if I had a Windoiws I already solved and I am very sorry because I thought that Apple was higher, but I was wrong. I searched the internet for use with the commands diskutil, to erase and reformat EVERYTHING, but I find nothing exact. I tried to do the installation from USB stick, but DO NOT know what I need to delete and what not. Do not match the disks Disk Utility with those of diskutil. What a disappointment this iMac !!! And to think that I did NOT NOTHING other than the use of the Base Camp. it is clear that this program does NOT work at all well ... I wonder if anyone's really up to you really know how to format from scratch iMac !!!. Very, very disappointed, John

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Answer 3

Loner T

Level 9

59,471 points

Dec 11, 2015 2:09 PM in response to Joe Falco

Can you post the output of the following commands from OSX Terminal?

sudo gpt -vv -r show /dev/disk0

sudo gpt -vv -r show /dev/disk1

Enter your password when prompted.

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Answer 4

Joe Falco Author

Level 1

1 points

Dec 11, 2015 2:10 PM in response to Joe Falco

Last login: Fri Dec 11 22:49:11 on console

iMac:~ JoeFalco$ sudo gpt -vv -r show /dev/disk0

Password:

gpt show: /dev/disk0: mediasize=1000204886016; sectorsize=512; blocks=1953525168

gpt show: /dev/disk0: PMBR at sector 0

gpt show: /dev/disk0: Pri GPT at sector 1

gpt show: /dev/disk0: Sec GPT at sector 1953525167

start size index contents

0 1 PMBR

1 1 Pri GPT header

2 32 Pri GPT table

34 6

40 409600 1 GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B

409640 1873730944 2 GPT part - 53746F72-6167-11AA-AA11-00306543ECAC

1874140584 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

1875410120 922424

1876332544 204800 4 GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B

1876537344 76987791

1953525135 32 Sec GPT table

1953525167 1 Sec GPT header

iMac:~ JoeFalco$ sudo gpt -vv -r show /dev/disk1

gpt show: /dev/disk1: mediasize=24002560000; sectorsize=4096; blocks=5860000

gpt show: /dev/disk1: PMBR at sector 0

gpt show: /dev/disk1: Pri GPT at sector 1

gpt show: /dev/disk1: Sec GPT at sector 5859999

start size index contents

0 1 PMBR

1 1 Pri GPT header

2 4 Pri GPT table

6 76800 1 GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B

76806 5750421 2 GPT part - 53746F72-6167-11AA-AA11-00306543ECAC

5827227 32768 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

5859995 4 Sec GPT table

5859999 1 Sec GPT header

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Answer 5

Loner T

Level 9

59,471 points

Dec 11, 2015 4:06 PM in response to Joe Falco

My recommendation is

1. Back up OSX using Time Machine - Use Time Machine to back up or restore your Mac - Apple Support . The disks you can use with TM are Backup disks you can use with Time Machine - Apple Support .

2. Boot into Internet Recovery - OS X: About OS X Recovery - Apple Support (Command+Opt+R).

3. Erase your internal disks. Use Utilities -> Disk Utility to erase your internal disks. If that does not work, we can manually rebuild the disks.

4. Restore OSX using links in Step 1.

5. Run SMC/NVRAM Reset without any other external storage attached.

6. Run BC Assistant and install Windows.

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Answer 6

Joe Falco Author

Level 1

1 points

Dec 16, 2015 10:02 PM in response to Loner T

Hello, I tried your procedure, but no, I am NOT able to "Erase your internal disks. Use Utilities -> Disk Utility to erase your internal disks. If That does not work, we can manually rebuild the disks." I think the only way, is to use the command "diskutil", but do not know the correct syntax and so can not proceed. Thanks, I'll open another post about using this tool.

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Answer 7

Loner T

Level 9

59,471 points

Dec 17, 2015 2:11 AM in response to Joe Falco

Please see can't install windows on my mac. help! as a reference (the diskutil cs commands parts) to delete and rebuild the CS LVG/LV.

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Answer 8

Dec 17, 2015 5:51 AM in response to Joe Falco

Hi,

Same issue here.

Have tried to instal windows and it didn't worked.

Now i have this alert when launching BC :

Can't do anything now, please help.

SonicStudio:~ SonicStudio$ diskutil list

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *2.0 TB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_CoreStorage Macintosh HD 1.4 TB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3

4: EFI NO NAME 104.9 MB disk0s4

5: Apple_HFS SANS TITRE 16.8 MB disk0s5

6: EFI NO NAME 104.9 MB disk0s6

7: Apple_HFS BOOTCAMP 543.5 GB disk0s7

/dev/disk1 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *121.3 GB disk1

1: EFI EFI 209.7 MB disk1s1

2: Apple_CoreStorage Macintosh HD 121.0 GB disk1s2

3: Apple_Boot Boot OS X 134.2 MB disk1s3

/dev/disk2 (internal, virtual):

#: TYPE NAME SIZE IDENTIFIER

0: Apple_HFS Macintosh HD +1.6 TB disk2

Logical Volume on disk1s2, disk0s2

BBEF1EE5-70F8-496B-ADCA-E81DDCEA2AD5

Unencrypted Fusion Drive

/dev/disk3 (external, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *3.0 TB disk3

1: EFI EFI 209.7 MB disk3s1

2: Apple_HFS LaCie 2.5 TB disk3s2

3: Microsoft Basic Data LACIE SHARE 509.9 GB disk3s3

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Answer 9

Loner T

Level 9

59,471 points

Dec 17, 2015 6:01 AM in response to yoda75020

The following partitions will cause problems.

4: EFI NO NAME 104.9 MB disk0s4

5: Apple_HFS SANS TITRE 16.8 MB disk0s5

6: EFI NO NAME 104.9 MB disk0s6

7: Apple_HFS BOOTCAMP 543.5 GB disk0s7

Since you have a Fusion drive, the backup/erase internal disk(s)/restore method is the recommended solution.

Do not connect any external storage when installing Windows (except the Windows USB Installer created by BCA, if using a USB Installer).

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Answer 10

Dec 17, 2015 6:11 AM in response to Loner T

Thanks for your answer

please can you tel me How to do ?

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Answer 11

Loner T

Level 9

59,471 points

Dec 17, 2015 6:16 AM in response to yoda75020

Use the Time Machine method a couple of posts above this one. If you run into any CoreStorage issues, I can provide Terminal commands. There is also a link above for the Terminal commands to rebuild the CS/Fusion drive. If you need exact step by start an new discussion and we can discuss the steps.

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