Reclaim all space on fusion 1TB CoreStorage High Sierra

Question

Level 1

19 points

Reclaim all space on fusion 1TB CoreStorage High Sierra

By removing a partition from my Fusion HDD I managed to grow the recovery disk to 500GB on the non-ssd part? So basically only half my drive storage is available.

I already managed to get rid of the recovery disk using

- diskutil eraseVolume "Free Space" %noformat% /dev/disk1s3

but can't find a way to reclaim the space for my Mac HDD

Diskutil tells me my HDD is using 100%, I cannot grow the partition, don't find a way to do it in terminal either.

- "diskutil resizeVolume disk1s2 limits" from startup USB stick can't provide any numbers for resizing (though disk is unmounted it asks if I'm sure disk is unmounted)

I'd greatly appreciate any help (preferable non destructive solution, but I have double backup available if needed)

Here's my diskutil list and cs list

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *121.3 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_CoreStorage Untitled 121.0 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 Untitled 442.4 GB disk1s2

/dev/disk2 (internal, virtual):

#: TYPE NAME SIZE IDENTIFIER

0: Apple_HFS Macintosh HDD +557.6 GB disk2

Logical Volume on disk0s2, disk1s2

67D389EB-A8D6-4855-B180-A6BC8D88F361

Unencrypted Fusion Drive

/dev/disk3 (external, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *2.0 TB disk3

1: EFI EFI 209.7 MB disk3s1

2: Apple_HFS Backup 2.0 TB disk3s2

Benjamins-iMac:~ benjamin$ diskutil cs list

CoreStorage logical volume groups (1 found)

|

+-- Logical Volume Group 129496C7-CA20-404F-91C2-369D2907DF59

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

Name: Untitled

Status: Online

Size: 563419676672 B (563.4 GB)

Free Space: 122880 B (122.9 KB)

|

+-< Physical Volume 32CDA59B-C18B-427A-A512-AAB5C34A16A7

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

| Index: 0

| Disk: disk0s2

| Status: Online

| Size: 120988852224 B (121.0 GB)

|

+-< Physical Volume A1D773B3-D1E1-4C95-A931-6CE92CB4EEA2

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

| Index: 1

| Disk: disk1s2

| Status: Online

| Size: 442430824448 B (442.4 GB)

|

+-> Logical Volume Family 626270EF-2257-4F2A-8A86-3A1DA3269961

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

Encryption Type: None

|

+-> Logical Volume 67D389EB-A8D6-4855-B180-A6BC8D88F361

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

Disk: disk2

Status: Online

Size (Total): 557564297216 B (557.6 GB)

Revertible: No

LV Name: Macintosh HDD

Volume Name: Macintosh HDD

Content Hint: Apple_HFS

LVG Type: Fusion, Sparse

Posted on Dec 10, 2017 1:43 PM

Reply

Answer 1

Best reply

Codon999 Author

Level 1

19 points

Dec 13, 2017 12:41 PM in response to Codon999

Ok I managed to fix it. Here's the magic that did the trick...

1) Back-up.

2) Make another back-up (all your data from your HDD will be wiped!)

3) Take a deep breath

4) Follow these instructions:

Booted to Internet Recovery Mode open Utilities → Terminal in the menubar and enter:
```
diskutil cs list
```
to get the CoreStorage listing.
Copy the Logical Volume UUID, it's the usually fifth listed.

Now delete the Logical Volume with

diskutil cs deleteVolume LVUUID

.
For example:

diskutil cs deleteVolume D237FFDC-7DA4-41D7-AC13-4CC7E5E8C0A0

.

Copy the Logical Volume Group UUID, it's usually the first listed in the listing of
```
diskutil cs list
```
.

Then delete the Logical Volume Group with

diskutil cs delete LVGUUID

.
For example:

diskutil cs delete 1EFE58BC-3613-44C4-86EE-D816F3B66E3E

Enter exit and quit 'Terminal' but remain in recovery startup

These will destroy the logical volume of your fusion drive and break it up into a SSD and regular HDD.

5) Start Disk Utility, click on a part of the split fusion drive (in red) and allow to repair when the dialog asks for it.

6) Quit disk utility and

7) Start Restore and restore your drive from a time machine backup

Reply

Answer 2

Codon999 Author

Level 1

19 points

Dec 13, 2017 11:23 AM in response to Codon999

Anyone?

Reply