Missing space (possibly corrupted disk?) after uninstalling boot camp

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Level 1

8 points

Missing space (possibly corrupted disk?) after uninstalling boot camp

Hi, after a particularly hard crash on windows bootcamp, my colleague did something that uninstalled the entire partition, but currently this iMac is left with only about 40gb of storage under disk utilities, split into a few different drives. how do I recombine all the drives and recover the lost space? id like to do a clean bootcamp again.

BSH20088s-iMac:~ bsh20088$ diskutil list

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: *4.1 GB disk0

/dev/disk1 (internal):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme 28.0 GB disk1

1: EFI EFI 314.6 MB disk1s1

2: Apple_HFS Untitled 27.0 GB disk1s2

3: Apple_Boot Recovery HD 650.0 MB disk1s3

iMac Line (2012 and Later)

Posted on Jan 13, 2020 7:32 PM

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Answer 1

Loner T

Level 9

59,526 points

Jan 14, 2020 5:04 AM in response to orbitouss

Can you run a SMC and NVRAM Reset and re-run the commands?
- How to reset the SMC of your Mac - Apple Support
- Reset NVRAM or PRAM on your Mac - Apple Support
Also, click on About This Mac -> System Report, look under SATA/SATA Express as well as NVME, for disks.

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Answer 2

Loner T

Level 9

59,526 points

Jan 13, 2020 8:34 PM in response to orbitouss

The iMac layout from your output indicates a Fusion drive. The 28Gb disk is the SSD part of the Fusion drive. There is a HDD part of the Fusion drive, which just shows 4Gb, which is incorrect. Either the disk has failed or is failing, or the GPT has been corrupted.

Can you post the output of

diskutil info disk0

diskutil info disk1

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Answer 3

orbitouss Author

Level 1

8 points

Jan 13, 2020 8:56 PM in response to Loner T

Thanks for the speedy reply.

diskutil info disk0 returned : Could not find disk: disk0

diskutil info disk0 returned : Device Identifier: disk1

Device Node: /dev/disk1

Whole: Yes

Part of Whole: disk1

Device / Media Name: APPLE SSD SM0032L

Volume Name: Not applicable (no file system)

Mounted: Not applicable (no file system)

File System: None

Content (IOContent): GUID_partition_scheme

OS Can Be Installed: No

Media Type: Generic

Protocol: PCI-Express

SMART Status: Not Supported

Disk Size: 28.0 GB (28000002048 Bytes) (exactly 54687504 512-Byte-Units)

Device Block Size: 4096 Bytes

Read-Only Media: No

Read-Only Volume: Not applicable (no file system)

Device Location: Internal

Removable Media: Fixed

Solid State: Yes

OS 9 Drivers: No

Low Level Format: Not supported

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Answer 4

orbitouss Author

Level 1

8 points

Jan 14, 2020 11:13 PM in response to Loner T

I've done the two resets,

diskutil info disk0 now returns

Device Identifier: disk0

Device Node: /dev/disk0

Whole: Yes

Part of Whole: disk0

Device / Media Name: ST1000DM003

Volume Name: Not applicable (no file system)

Mounted: Not applicable (no file system)

File System: None

Content (IOContent): None

OS Can Be Installed: No

Media Type: Generic

Protocol: SATA

SMART Status: Not Supported

Disk Size: 4.1 GB (4142054400 Bytes) (exactly 8089950 512-Byte-Units)

Device Block Size: 512 Bytes

Read-Only Media: No

Read-Only Volume: Not applicable (no file system)

Device Location: Internal

Removable Media: Fixed

Solid State: No

Virtual: No

OS 9 Drivers: No

Low Level Format: Not supported

while diskutil info disk1 returns now

Device Identifier: disk1

Device Node: /dev/disk1

Whole: Yes

Part of Whole: disk1

Device / Media Name: APPLE SSD SM0032L

Volume Name: Not applicable (no file system)

Mounted: Not applicable (no file system)

File System: None

Content (IOContent): GUID_partition_scheme

OS Can Be Installed: No

Media Type: Generic

Protocol: PCI-Express

SMART Status: Not Supported

Disk Size: 28.0 GB (28000002048 Bytes) (exactly 54687504 512-Byte-Units)

Device Block Size: 4096 Bytes

Read-Only Media: No

Read-Only Volume: Not applicable (no file system)

Device Location: Internal

Removable Media: Fixed

Solid State: Yes

OS 9 Drivers: No

Low Level Format: Not supported

Under SATA I found this one drive

ST1000DM003:

Capacity: 4.14 GB (4,142,054,400 bytes)

Model: ST1000DM003

Revision: AQ04

Serial Number: Z4YF0L9F

Native Command Queuing: Yes

Queue Depth: 32

Removable Media: No

Detachable Drive: No

BSD Name: disk0

Rotational Rate: 7200

Medium Type: Rotational

Partition Map Type: Unknown

while under NVME I found this

APPLE SSD SM0032L:

Capacity: 28 GB (28,000,002,048 bytes)

TRIM Support: Yes

Model: APPLE SSD SM0032L

Revision: DXZ77A0Q

Serial Number: S3DUNY0J200391

Link Width: x2

Link Speed: 8.0 GT/s

Detachable Drive: No

BSD Name: disk1

Partition Map Type: GPT (GUID Partition Table)

Removable Media: No

Volumes:

EFI:

Capacity: 314.6 MB (314,572,800 bytes)

BSD Name: disk1s1

Content: EFI

Volume UUID: E783267B-A4C3-3556-B751-DBED770EB996

Untitled:

Capacity: 27.04 GB (27,035,381,760 bytes)

Available: 13.71 GB (13,710,307,328 bytes)

Writable: Yes

File System: Journaled HFS+

BSD Name: disk1s2

thank you for your help so far!

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Answer 5

Loner T

Level 9

59,526 points

Jan 15, 2020 10:06 AM in response to orbitouss

Good to see that the disk is now visible, but it still has issues. It should report 1TB, not 4GB.

Can you post the output of

sudo get -vv -r show /dev/disk0 (change this to disk1, if the 1TB disk moves).

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Missing space (possibly corrupted disk?) after uninstalling boot camp

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