The full size of the Fusion Drive is not available for repartitioning.

Question

The full size of the Fusion Drive is not available for repartitioning.

Hey, I attempted to install my copy of Windows 8.1 via Boot Camp Assistant on my iMac 27" late 2013 and I was met with the error: "We couldn't create a new partition or locate an existing one" while selecting the Boot Camp partition BCA had created for me (I made sure there are no external hard drives connected to the iMac while doing this).

I logged back into Yosemite and removed the partition I had just created with BCA and I tried to verify/repair my Fusion Drive in Disk Utility and under the "Partition" tab there was a message saying "The full size of the Fusion Drive is not available for repartitioning."

The HD is 1 TB and there are no partitions at all. There is no "Free Space" and nothing out of the ordinary. I'm not missing any disk space that I know of.

How can I fix my Fusion Drive so I can repartition it again? Could this be the reason why I couldn't install Windows?

Thanks!

iMac, Mac OS X (10.1.x)

Posted on Aug 25, 2015 11:59 AM

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Answer 1

Best reply

rkaufmann87

Level 10

140,418 points

Aug 25, 2015 12:04 PM in response to Pterotactical

If no one on this forum is able to help you, there is a Boot Camp forum you can access. That is where the Boot Camp and Windows gurus tend to hang out so your best bet may be to post there. You can find it by clicking Boot Camp

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Answer 2

Loner T

Level 9

59,471 points

Aug 25, 2015 12:12 PM in response to rkaufmann87

Please post the output of the following Treminal commands.

diskutil list

diskutil cs list

sudo gpt -vv -r show /dev/disk0

sudo fdisk /dev/disk0

The "sudo" commands will prompt for your password, and it will not be echoed back. You may also see a warning about improper use of "sudo" and potential data loss due to "abuse" of the command.

Do you have FileVault enabled?

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Answer 3

Aug 25, 2015 7:48 PM in response to Loner T

FileVault is off.

diskutil list

/dev/disk0

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *121.3 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_CoreStorage 121.0 GB disk0s2

3: Apple_Boot Boot OS X 134.2 MB disk0s3

/dev/disk1

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *1.0 TB disk1

1: EFI EFI 209.7 MB disk1s1

2: Apple_CoreStorage 999.3 GB disk1s2

3: Apple_Boot Recovery HD 650.0 MB disk1s3

/dev/disk2

#: TYPE NAME SIZE IDENTIFIER

0: Apple_HFS Macintosh HD *1.1 TB disk2

Logical Volume on disk0s2, disk1s2

8C372C13-2F3E-417F-A2EC-274B19DDFB0A

Unencrypted Fusion Drive

diskutil cs list

CoreStorage logical volume groups (1 found)

|

+-- Logical Volume Group C36BFB3E-6854-4172-8DD6-C59E06DAF342

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

Name: Internal Drive

Status: Online

Size: 1120333979648 B (1.1 TB)

Free Space: 114688 B (114.7 KB)

|

+-< Physical Volume E157367C-C220-463B-95E3-27E45FB732BD

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

| Index: 0

| Disk: disk0s2

| Status: Online

| Size: 120988852224 B (121.0 GB)

|

+-< Physical Volume BBCEFAAB-9FC4-45CF-9775-D438BC71B14D

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

| Index: 1

| Disk: disk1s2

| Status: Online

| Size: 999345127424 B (999.3 GB)

|

+-> Logical Volume Family 7CF0A469-B6D5-4552-8C4D-BE261863571F

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

Encryption Status: Unlocked

Encryption Type: None

Conversion Status: NoConversion

Conversion Direction: -none-

Has Encrypted Extents: No

Fully Secure: No

Passphrase Required: No

|

+-> Logical Volume 8C372C13-2F3E-417F-A2EC-274B19DDFB0A

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

Disk: disk2

Status: Online

Size (Total): 1114478608384 B (1.1 TB)

Conversion Progress: -none-

Revertible: No

LV Name: Macintosh HD

Volume Name: Macintosh HD

Content Hint: Apple_HFS

sudo gpt -vv -r show /dev/disk0

gpt show: /dev/disk0: mediasize=121332826112; sectorsize=512; blocks=236978176

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 236978175

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 236306352 2 GPT part - 53746F72-6167-11AA-AA11-00306543ECAC

236715992 262144 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

236978136 7

236978143 32 Sec GPT table

236978175 1 Sec GPT header

sudo fdisk /dev/disk 0

gpt show: /dev/disk0: mediasize=121332826112; sectorsize=512; blocks=236978176

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 236978175

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 236306352 2 GPT part - 53746F72-6167-11AA-AA11-00306543ECAC

236715992 262144 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

236978136 7

236978143 32 Sec GPT table

236978175 1 Sec GPT header

Chriss-iMac:~ Pterotactical$ sudo fdisk /dev/disk0

Password:

Disk: /dev/disk0 geometry: 14751/255/63 [236978176 sectors]

Signature: 0xAA55

Starting Ending

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

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

1: EE 1023 254 63 - 1023 254 63 [ 1 - 236978175] <Unknown ID>

2: 00 0 0 0 - 0 0 0 [ 0 - 0] unused

3: 00 0 0 0 - 0 0 0 [ 0 - 0] unused

4: 00 0 0 0 - 0 0 0 [ 0 - 0] unused

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Answer 4

Loner T

Level 9

59,471 points

Aug 26, 2015 5:18 AM in response to Pterotactical

Can you also post the output of

sudo gpt -vv -r show /dev/disk1

sudo fdisk /dev/disk1

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Answer 5

Aug 26, 2015 7:42 AM in response to Loner T

sudo gpt -vv -r show /dev/disk1

gpt show: /dev/disk1: mediasize=1000204886016; sectorsize=512; blocks=1953525168

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 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 1951845952 2 GPT part - 53746F72-6167-11AA-AA11-00306543ECAC

1952255592 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

1953525128 7

1953525135 32 Sec GPT table

1953525167 1 Sec GPT header

sudo fdisk /dev/disk1

Disk: /dev/disk1 geometry: 121601/255/63 [1953525168 sectors]

Signature: 0xAA55

Starting Ending

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

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

1: EE 1023 254 63 - 1023 254 63 [ 1 - 1953525167] <Unknown ID>

2: 00 0 0 0 - 0 0 0 [ 0 - 0] unused

3: 00 0 0 0 - 0 0 0 [ 0 - 0] unused

4: 00 0 0 0 - 0 0 0 [ 0 - 0] unused

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Answer 6

Loner T

Level 9

59,471 points

Aug 26, 2015 1:00 PM in response to Pterotactical

Based on what you have posted so far, there is no available disk space remaining to be allocated.

Size: 1120333979648 B (1.1 TB)

Free Space: 114688 B (114.7 KB)

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Answer 7

Aug 26, 2015 1:21 PM in response to Loner T

What can I do to resolve this? I have already tried reformatting my entire hard drive and there is absolutely nothing on it right now.

Thanks for the help.

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Answer 8

Loner T

Level 9

59,471 points

Aug 26, 2015 2:31 PM in response to Pterotactical

I logged back into Yosemite and removed the partition I had just created with BCA and I tried to verify/repair my Fusion Drive in Disk Utility and under the "Partition" tab there was a message saying "The full size of the Fusion Drive is not available for repartitioning."

This is an expected message. You cannot install Windows on the SSD part of the Fusion drive, so this is very logical. If you are running into partitioning issues when running BCA, run DU Repair before the BCA partitioning, and run the following two procedures.

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

How to Reset NVRAM on your Mac - Apple Support

and test.

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