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Level 1

1 points

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

Best reply

Loner T

Level 9

59,471 points

Posted on Dec 11, 2015 1:17 PM

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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33 replies

Loner T

Level 9

59,471 points

Dec 17, 2015 7:51 AM in response to yoda75020

Start a new discussion and post the output of the commands.

Joe Falco Author

Level 1

1 points

Dec 19, 2015 11:29 PM in response to Loner T

I solved it by calling Apple.

Loner T

Level 9

59,471 points

Dec 20, 2015 7:01 AM in response to Joe Falco

Can you describe what steps they took to fix your issues? Did Apple support techs use terminal commands (diskutil cs) to rebuild your Fusion drive?

Joe Falco Author

Level 1

1 points

Dec 20, 2015 11:59 AM in response to Loner T

Hi, I deleted the Logical Volume Group and I rebuilt it, then I reinstalled IOS.

Now the setting is:

/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 myLogicalVolGroup 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 myLogicalVolGroup 999.3 GB disk1s2

3: Apple_Boot Recovery HD 650.0 MB disk1s3

/dev/disk2 (internal, virtual):

#: TYPE NAME SIZE IDENTIFIER

0: Apple_HFS Macintosh HD +1.0 TB disk2

Logical Volume on disk1s2, disk0s2

AFAC80D8-7897-401D-A8AD-85E69DF76BED

Unencrypted Fusion Drive

Joe Falco Author

Level 1

1 points

Dec 20, 2015 12:07 PM in response to Loner T

Yes, Apple support techs have used the diskutil cs command, delete and coreStorage createVolume AAAAAAAA-BBBB-CCCC-DDDD-EEEEEEEEEEEE jhfs+ "Macintosh HD" 100%

Loner T

Level 9

59,471 points

Dec 20, 2015 12:23 PM in response to Joe Falco

Can you post the output of diskutil cs list? There seems to be an issue when it was built, but the output will confirm if there an issue or not. The 24Gb disk (SSD) should be the at index 0 in CS volume, not index 1. If the order of disks is as shown here, that is a problem.

/dev/disk2 (internal, virtual):

#: TYPE NAME SIZE IDENTIFIER

0: Apple_HFS Macintosh HD +1.0 TB disk2

Logical Volume on disk1s2, disk0s2

AFAC80D8-7897-401D-A8AD-85E69DF76BED

Unencrypted Fusion Drive

Joe Falco Author

Level 1

1 points

Dec 20, 2015 12:36 PM in response to Loner T

iMac:~ JoeFalco$ diskutil cs list

CoreStorage logical volume groups (1 found)

+-- Logical Volume Group E7E49732-1076-47DB-ABC8-EF7EEA0978D0

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

Name: myLogicalVolGroup

Status: Online

Size: 1022898851840 B (1.0 TB)

Free Space: 45056 B (45.1 KB)

+-< Physical Volume EF73466E-B149-4169-84EE-1BE1B9D9A9A3

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

| Index: 0

| Disk: disk1s2

| Status: Online

| Size: 999345127424 B (999.3 GB)

+-< Physical Volume CDDDBD3F-62FC-45E5-B70C-1291B6AFCDEA

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

| Index: 1

| Disk: disk0s2

| Status: Online

| Size: 23553724416 B (23.6 GB)

+-> Logical Volume Family 3EC47C5B-8A19-4669-98BA-5D9BD4F5EA6B

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

Encryption Type: None

+-> Logical Volume AFAC80D8-7897-401D-A8AD-85E69DF76BED

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

Disk: disk2

Status: Online

Size (Total): 1021994074112 B (1.0 TB)

Revertible: No

LV Name: Macintosh HD

Volume Name: Macintosh HD

Content Hint: Apple_HFS

LVG Type: Fusion, Sparse

Loner T

Level 9

59,471 points

Dec 20, 2015 12:49 PM in response to Joe Falco

You may run into performance issues with the HDD being at index 0. If you have Time Machine configured and create a new backup, the ordering can be changed by rebuilding the CS and ordering the disks correctly. Also, the 24GB disk is actually larger, but the 4K block size used is causing the calculations of disk space to be incorrect. The 4K blocks are new on these Macs.

Let me know if you want to rebuild the CS LVG/LV and I can provide commands to be used after your Mac is booted in Internet Recovery (Command+Opt+R).

Joe Falco Author

Level 1

1 points

Dec 20, 2015 1:11 PM in response to Loner T

Sorry, but I don't understand. What kind of problem can I have, with that configuration?

Loner T

Level 9

59,471 points

Dec 20, 2015 1:46 PM in response to Joe Falco

Under normal configuration, the SSD part at index 0 will move blocks to disks at index 1..n when disk blocks are not needed, but if the ordering is different, your slower device is doing more work.

Please see https://jolly.jinx.de/teclog/2012.10.20.fusion-drive-on-older-macs-yes.html and https://jolly.jinx.de/teclog/2012.10.31.01-more-on-byo-fusion-drive.html as a reference.

Joe Falco Author

Level 1

1 points

Dec 21, 2015 9:18 AM in response to Loner T

I understood little. I would not be in trouble and I would re-contact Apple for a change is not required from them. Sorry, but I'm a chicken for these things...😢

Loner T

Level 9

59,471 points

Dec 21, 2015 9:50 AM in response to Joe Falco

No worries. You can call Apple Tech Support and state/ask them about the index at which the SSD should be located in a Fusion configuration. They should understand and ask you for the diskutil cs list or log into your Mac and try to address it. Please ensure you have good backups.

Feb 8, 2016 9:01 PM in response to Joe Falco

Apple community says I can't update or post questions but i can comment weird... but here is a question similar to the question that started this discussion please help or tell me how to post a question!

On my MacBook pro I wanted to clean some stuff out and start a new so I created a new partition and put everything on that and erased the old partition and not I can't merge the old partition the subtract button is greyed out they are right next to each other on the disk but the space is the 2nd disk and Chicken my HD is the 4th is there a way that I can merge space into chicken or what would i have to do I've tried doing it in recovery mode that also didn't work the 3rd disk used to be the recovery partition but I thought if I deleted that and got that out of the way it might work but it didn't please help thx.

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *751.3 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_HFS SPACE 373.0 GB disk0s2

3: Apple_HFS Chicken 377.8 GB disk0s4

Jonathans-MacBook-Pro:~ jonathansegal$