Soooo something bad happened recently with my 1 TB Fusion drive on my 5K late 2015 iMac. I was creating a new 100 GB partition on my disk. So while the disk utility was busy scanning etc (doing its stuff). The power at my home suddenly went off so this got interrupted… When I rebooted my iMac back the disk size shows like this..
As you can see it shows 1 TB on the left side as it supposed to.. But it thinks it only got a 306.34 GB disk size after the interruption.. What happened to the other space..? In Disk Utility it only shows 1 partition.
I ran a few tests in Terminal.app with these outputs:
diskutil list
/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 999.3 GB disk0s2
3: Apple_Boot Recovery HD 650.0 MB disk0s3
/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 +306.3 GB disk2
Logical Volume on disk1s2, disk0s2
5C3ED08A-8DA2-405E-BFC5-E84CF864742F
Unencrypted Fusion Drive
/dev/disk3 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: W10PRO.VLX64.MULTi7... +3.7 GB disk3
diskutil list disk0
/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 999.3 GB disk0s2
3: Apple_Boot Recovery HD 650.0 MB disk0s3
sudo gpt -vv -r show /dev/disk0
gpt show: /dev/disk0: mediasize=1000204886016; sectorsize=512; blocks=1953525168
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 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 gpt -vv -r show /dev/disk1
gpt show: /dev/disk1: mediasize=24002560000; sectorsize=4096; blocks=5860000
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 5859999
start size index contents
0 1 PMBR
1 1 Pri GPT header
2 4 Pri GPT table
6 76800 1 GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B
76806 5750421 2 GPT part - 53746F72-6167-11AA-AA11-00306543ECAC
5827227 32768 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC
5859995 4 Sec GPT table
5859999 1 Sec GPT header
diskutil coreStorage list
CoreStorage logical volume groups (1 found)
|
+-- Logical Volume Group 367115C7-D6D1-4897-B982-A07794C9E545
=========================================================
Name: Macintosh HD
Status: Online
Size: 1022898851840 B (1.0 TB)
Free Space: 715653558272 B (715.7 GB)
|
+-< Physical Volume A837D2C2-A9C6-4BB1-834A-62E053EBD4C4
| ----------------------------------------------------
| Index: 0
| Disk: disk1s2
| Status: Online
| Size: 23553724416 B (23.6 GB)
|
+-< Physical Volume 5B84CBB0-6301-4972-BF46-0CBECCEA7922
| ----------------------------------------------------
| Index: 1
| Disk: disk0s2
| Status: Online
| Size: 999345127424 B (999.3 GB)
|
+-> Logical Volume Family 4322DF83-825A-4E09-BFE7-B6B4E46E82A8
----------------------------------------------------------
Encryption Type: None
|
+-> Logical Volume 5C3ED08A-8DA2-405E-BFC5-E84CF864742F
---------------------------------------------------
Disk: disk2
Status: Online
Size (Total): 306340560896 B (306.3 GB)
Revertible: No
LV Name: Macintosh HD
Volume Name: Macintosh HD
Content Hint: Apple_HFS
LVG Type: Fusion, Sparse
I will be so grateful if anyone can help me with this problem.. I need the whole 1 TB of space for work/school and personal stuff..
Any help is highly appreciated!
Best Answer
I eventually made a call with Apple support. They asked me to use the option first aid in Disk Utility, this didn't help. They then asked me to reboot my iMac in recovery mode and do the same thing again. This also didn't help.
After these two options to repair my partition, they asked me to back-up whole drive and reinstall OSX. They told me that this would definitely work because the hard drive was a fusion drive, part mechanic and part ssd.. Can't remember the exact details on why this would work thought... But i reinstalled my whole OSX and got my 1TB back. :).