Messed up 1TB Fusion Drive Partitions (on iMac 5K)
Alright, so I did something stupid today, and I really need some help right now…
So kinda like the situation in this post I think I messed up the Fusion Drive on my 1TB iMac (with BootCamp), I messed up my 1TB Fusion Drive while installing Windows 10 in BootCamp. I don’t want Windows no more, just want my Fusion Drive to be back to its original state.
So right now it’s really weird, the SSD part of the drive seems fine but the HDD part is messed up. As you can see here, I got EFI, Core Storage, and Recovery HD, they are all fine, but there are 3 more partitions:
- 138.62GB Free
- 104.86MB NO NAME in FAT32
- 99.9GB Free
But OS X Doesn’t recognize these partitions at all, not even in Disk Utility, and my Macintosh HD is now “downsized" to 875 GB
I don’t want the last three partitions, just want them to be merged to Macintosh HD, so I can use my Mac with just one main hard drive. I tried everything, but still can’t manage to merge them back. I tried using El Captain Disk Utility, but can’t see any of the partition, also tried booting into Yosemite recovery disk and use the old Disk Utility, still can’t merge them back. Please give me some advice!
Below are some more detailed info I recorded:
I’m on OS X 10.11.1, iMac (Retina 5K, 27-inch, Late 2014), 1.12 TB Fusion Drive
duskutil cs list
CoreStorage logical volume groups (1 found)
|
+-- Logical Volume Group D481E62E-A993-40EF-9568-DCF708BC3B64
=========================================================
Name: Macintosh HD
Status: Online
Size: 881703424000 B (881.7 GB)
Free Space: 28672 B (28.7 KB)
|
+-< Physical Volume 7D7CA850-3B9D-445B-8AC9-81ABB67A8186
| ----------------------------------------------------
| Index: 0
| Disk: disk0s2
| Status: Online
| Size: 120988852224 B (121.0 GB)
|
+-< Physical Volume D51952ED-5354-4B9B-A15B-5D9C8E82E7F2
| ----------------------------------------------------
| Index: 1
| Disk: disk1s2
| Status: Online
| Size: 760714571776 B (760.7 GB)
|
+-> Logical Volume Family 2A62CE1E-E0BD-44C8-A1BA-7F6BCA787A87
----------------------------------------------------------
Encryption Type: None
|
+-> Logical Volume 5E88EF38-D2A8-4A7D-8508-5C24D948877D
---------------------------------------------------
Disk: disk2
Status: Online
Size (Total): 875848138752 B (875.8 GB)
Revertible: No
LV Name: Macintosh HD
Volume Name: Macintosh HD
Content Hint: Apple_HFS
LVG Type: Fusion, Sparse
diskutil 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 Macintosh HD 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 Macintosh HD 760.7 GB disk1s2
3: Apple_Boot Recovery HD 650.1 MB disk1s3
4: EFI NO NAME 104.9 MB disk1s5
/dev/disk2 (internal, virtual):
#: TYPE NAME SIZE IDENTIFIER
0: Apple_HFS Macintosh HD +875.8 GB disk2
Logical Volume on disk0s2, disk1s2
5E88EF38-D2A8-4A7D-8508-5C24D948877D
Unencrypted Fusion Drive
/dev/disk3 (external, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *8.0 GB disk3
1: EFI EFI 209.7 MB disk3s1
2: Apple_HFS Install OS X Yosemite 7.7 GB disk3s2
/dev/disk4 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme +51.2 MB disk4
1: Apple_HFS Paragon Hard Disk Ma... 51.2 MB disk4s1
/dev/disk5 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme +3.0 TB disk5
1: EFI EFI 209.7 MB disk5s1
2: Apple_HFS Time Machine Backups 3.0 TB disk5s2
If anyone could help I would really appreciate it. I am really nervous right now, hope I can get this fixed soon!
Solution 1:
To expand your CoreStorage Logical Volume Macintosh HD you have to delete the blocking NO NAME EFI partition (disk1s5). The two unnamed parts (138.62 GB and 99.9 GB) are no partitions but unallocated disk space.
To remove the second EFI partition (and expand Macintosh HD) you have to boot to Internet Recovery Mode or an OS X system on an external device.
Preparation:
- Backup your data.
- Detach any external drive (especially your external Time Machine backup drive).
-
Restart to Internet Recovery Mode by pressing alt cmd R at startup.
The prerequisites are the latest firmware update installed, either ethernet or WLAN (WPA/WPA2) and a router with DHCP activated.
On a 50 Mbps-line it takes about 4 min (presenting a small animated globe) to boot to a recovery netboot image which usually is loaded from an Apple/Akamai server.I recommend ethernet because it's more reliable. If you are restricted to WIFI and the boot process fails, just restart your Mac until you succeed booting.
Alternatively you may start from a bootable installer thumb drive (Mavericks, Yosemite or El Capitan) or a thumb drive/external disk containing a full system (Mavericks, Yosemite or El Capitan). If you boot from a full system on an external volume and login as a user with admin permissions (which is required) you have to prepend
sudofor thegptcommand below.
Remove the second EFI partition and modify CoreStorage stack:
- Open in the menubar Utilities/Terminal
First you should get an overview of your disks and the partition layout:
- Enter
diskutil listandgpt -r show /dev/disk1(assuming disk1 is your HDD)
To resize the CoreStorage volume you have to delete any blocking partition first (the Recovery HD doesn't count because it usually will be moved with the resizeStack command).
-
First you have to unmount all mounted volumes on disk0 and disk1 (first the CoreStorage volume, which has its own disk identifier (e.g. disk3) but resides on disk0 and disk1) then all other Fusion Drive disks (assuming disk0 = SSD/disk1 = HHD. Please check the
diskutil listoutput for the proper disk identifiers and replace them in the commands below if necessary):diskutil umountDisk /dev/disk3then additional disks. Example:
diskutil umountDisk /dev/disk0 diskutil umountDisk /dev/disk1 -
Remove the second EFI partition (assuming the 103 MB partition has the index number 4 in the
gptlisting you got earlier)gpt remove -i 4 /dev/disk1 -
Remount all disks in the reverse order
diskutil mountDisk /dev/disk0 diskutil mountDisk /dev/disk1 diskutil mountDisk /dev/disk3 -
Since any blocking partition is deleted you may now resize the CoreStorage volume with
diskutil cs resizeStack LVUUID sizein your example that's
diskutil cs resizeStack 5E88EF38-D2A8-4A7D-8508-5C24D948877D 1100gto expand it to ~1,1 TB (or 1100 GB) or
diskutil cs resizeStack 5E88EF38-D2A8-4A7D-8508-5C24D948877D 0gto expand it to the full available size (0g is a magic number here).
The Recovery HD partition (disk1s3) will be moved to the end of disk1 automatically.
Quit Terminal and reboot to Macintosh HD