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Retina iMac 3tb Fusion drive Boot Camp failure

Trying to install Windows 8.1 to a 1tb Bootcamp partition on 3tb Fusion drive. BCA creates the partition, Windows installer sees it, but requires formatting it, but then it can't install to it. I get an error that it can't create or see the partition. I'm assuming this has to do with BCA creating the partition someplace Windows can't handle it (past the first 2.2tb of the drive).

Here is the info requested in a previous thread.

Rogers-iMac:~ reberhart$ 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 *3.0 TB disk1

1: EFI EFI 209.7 MB disk1s1

2: Apple_CoreStorage 2.0 TB disk1s2

3: Apple_Boot Recovery HD 650.0 MB disk1s3

4: Microsoft Basic Data 1.0 TB disk1s4

/dev/disk2

#: TYPE NAME SIZE IDENTIFIER

0: Apple_HFS Macintosh HD *2.1 TB disk2

Logical Volume on disk0s2, disk1s2

718A36B4-10B9-49A9-B585-CFC222080507

Unencrypted Fusion Drive

/dev/disk3

#: TYPE NAME SIZE IDENTIFIER

0: FDisk_partition_scheme *8.0 GB disk3

1: DOS_FAT_32 WININSTALL 8.0 GB disk3s1

/dev/disk4

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *4.0 TB disk4

1: EFI EFI 314.6 MB disk4s1

2: Apple_HFS My Book 4.0 TB disk4s2

Rogers-iMac:~ reberhart$ diskutil cs list

CoreStorage logical volume groups (1 found)

+-- Logical Volume Group 49E959A5-5F3C-4178-8A2D-067D2C853A96

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

Name: Macintosh HD

Status: Online

Size: 2118855286784 B (2.1 TB)

Free Space: 114688 B (114.7 KB)

+-< Physical Volume D9052F80-9907-4815-8AF1-C9FF8D9C3293

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

| Index: 0

| Disk: disk0s2

| Status: Online

| Size: 120988852224 B (121.0 GB)

+-< Physical Volume E2271529-B42D-49F9-B231-3CAE6A0FF812

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

| Index: 1

| Disk: disk1s2

| Status: Online

| Size: 1997866434560 B (2.0 TB)

+-> Logical Volume Family AAC1C060-264E-4435-9992-5380CAF17B07

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

Encryption Status: Unlocked

Encryption Type: None

Conversion Status: NoConversion

Conversion Direction: -none-

Has Encrypted Extents: No

Fully Secure: No

Passphrase Required: No

+-> Logical Volume 718A36B4-10B9-49A9-B585-CFC222080507

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

Disk: disk2

Status: Online

Size (Total): 2112999915520 B (2.1 TB)

Conversion Progress: -none-

Revertible: No

LV Name: Macintosh HD

Volume Name: Macintosh HD

Content Hint: Apple_HFS

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

WARNING: Improper use of the sudo command could lead to data loss

or the deletion of important system files. Please double-check your

typing when using sudo. Type "man sudo" for more information.

To proceed, enter your password, or type Ctrl-C to abort.

Password:

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

Rogers-iMac:~ reberhart$ sudo fdisk /dev/disk0

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

iMac (Retina 5K, 27-inch, Late 2014), OS X Yosemite (10.10.2), null

Posted on Mar 15, 2015 3:36 PM

96 replies

Mar 18, 2015 8:35 AM in response to Loner T

Rogers-iMac:~ reberhart$ diskutil cs list

CoreStorage logical volume groups (1 found)

+-- Logical Volume Group 49E959A5-5F3C-4178-8A2D-067D2C853A96

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

Name: Macintosh HD

Status: Online

Size: 2620721192960 B (2.6 TB)

Free Space: 1614580658176 B (1.6 TB)

+-< Physical Volume D9052F80-9907-4815-8AF1-C9FF8D9C3293

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

| Index: 0

| Disk: disk0s2

| Status: Online

| Size: 120988852224 B (121.0 GB)

+-< Physical Volume E2271529-B42D-49F9-B231-3CAE6A0FF812

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

| Index: 1

| Disk: disk1s2

| Status: Online

| Size: 884866449408 B (884.9 GB)

+-< Physical Volume 62E20106-159B-4939-87C7-915CC8D682C5

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

| Index: 2

| Disk: disk1s5

| Status: Online

| Size: 1614865891328 B (1.6 TB)

+-> Logical Volume Family AAC1C060-264E-4435-9992-5380CAF17B07

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

Encryption Status: Unlocked

Encryption Type: None

Conversion Status: NoConversion

Conversion Direction: -none-

Has Encrypted Extents: No

Fully Secure: No

Passphrase Required: No

+-> Logical Volume 718A36B4-10B9-49A9-B585-CFC222080507

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

Disk: disk2

Status: Online

Size (Total): 999999930368 B (1000.0 GB)

Conversion Progress: -none-

Revertible: No

LV Name: Macintosh HD

Volume Name: Macintosh HD

Content Hint: Apple_HFS

Rogers-iMac:~ reberhart$ sudo fdisk /dev/disk1

Password:

Disk: /dev/disk1 geometry: 97451/255/63 [1565565872 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: AC 1023 254 63 - 1023 254 63 [ 409640 - 1728254784] <Unknown ID>

3: AB 1023 254 63 - 1023 254 63 [1728664424 - 1269536] Darwin Boot

4: 0B 1023 254 63 - 1023 254 63 [1729935360 - 976300032] Win95 FAT-32

Mar 18, 2015 8:49 AM in response to rogerfrommission viejo

Tried the EFI Boot method and received this error:

Loner T

Level 9

59,477 points

Mar 18, 2015 10:09 AM in response to rogerfrommission viejo

The resizeStack command created the MBR, which causes issues for EFI installation. The simplest method of making it a non-MBR setup is to download GPT Fdisk (http://sourceforge.net/projects/gptfdisk/) and use the following command sequence.

The first character is what is typed. The part after "-" is what the command is meant to do.

sudo gdisk /dev/disk0

x - extra functionality (experts only)

n - create a new protective MBR

o - print protective MBR data

w - write table to disk and exit

y - confirm

Reboot and try the EFI installation.

keg55

Level 6

11,743 points

Mar 18, 2015 2:21 PM in response to rogerfrommission viejo

Wait. Make sure you are selecting the Bootcamp partition. I'm not familiar with an EFI boot. I created my Window install from BCA. But I do remember getting an error the same or similar. I had to format the Bootcamp partition to NTFS which I did after closing the error message. Then the install continued.

Loner T

Level 9

59,477 points

Mar 18, 2015 2:34 PM in response to rogerfrommission viejo

Since you have Free Space in the LVG,

Free Space: 1614580658176 B (1.6 TB)

the LV Macintosh HD can be extended (please replace <NewSize> with appropriate value)

diskutil cs resizeVolume 718A36B4-10B9-49A9-B585-CFC222080507 <NewSize>

See the following for examples - Re: OSX and Bootcamp discussion

Mar 18, 2015 8:08 PM in response to Loner T

Apple support is supposed to be contacting me Saturday with a solution from the Bootcamp engineers. For now, I'm going to try to revert my hard drive back to the original 3tb single partition.

Thanks.

Mar 18, 2015 8:14 PM in response to Loner T

Okay....removed the Bootcamp partition via Disk Utility, but it wont' let me recombine the partitions. Also, missing some space. How do I merge these together and recover my lost space?

Loner T

Level 9

59,477 points

Mar 18, 2015 8:30 PM in response to rogerfrommission viejo

Were you not planning to try the EFI installation after the MBR was removed?

Mar 18, 2015 8:42 PM in response to Loner T

No, I'm going to wait and see what solution they come up with. Wasn't really happy with the size of the Bootcamp partition we created (wanted a full tb). Also, wasn't too sure how to reclaim the empty space I lost in the process. I don't know the exact size I need or even what "LV" stands for (logical volume?). A lot of these instructions are assuming a higher level of technical competence than I possess. So for now, I'd like to get back to where I started and see if the Apple engineers have a simpler process. If not, no big deal. At least they'll know Bootcamp is busted again with 3tb Fusion drives. When I spoke to their technical support, they seemed pretty clueless about the whole thing. They even suggested I contact Microsoft support, as if this was a Windows problem.

Loner T

Level 9

59,477 points

Mar 18, 2015 8:55 PM in response to rogerfrommission viejo

The simpler option is to backup OS X to a TM Backup, using Internet Recovery and erase and restore from Backup which was prior to the current disk work.

The harder method is to remove remove disk1s5 from the CS LV (Logical Volume) using diskutil cs removeDisk and reformat it as free space.

Reformat the BOOTCAMP disk as Free Space. This will reconstitute the Macintosh HD2 as Free Space. You can use DU to then extend the original upper half to contain the lower half.

Mar 18, 2015 10:58 PM in response to Loner T

Okay...just tried the first method. Did not work. After restoring a time machine backup from two days ago, it came back with the partitions exactly the same.

Can you explain the harder method.

Thanks.