Disk unmounted showing in disk utility [duplicate]
I have two drives inside my MBP, an SSD for the OS and the original HDD for large Data. The HDD has 3 Partitions:
- My Data (Core Storage volume)
- 20Gb for Linux
- 4Gb for Linux Swap
Recently I ran repair disk on the drive, as Disk Utility thought it was damaged. The repair aborted with the request to format and restore the whole drive, but I could use it like before (so maybe unrelated). Last night, everything was normal, but when I woke up, my data partition looked like this:
It used to be named Macintosh HD (like the drive) and now it has lost its name and the partition type turned into FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF.
diskutil info /dev/disk1s2 reports
Device Identifier: disk1s2
Device Node: /dev/disk1s2
Part of Whole: disk1
Device / Media Name: Macintosh HD
Volume Name: Not applicable (no file system)
Mounted: Not applicable (no file system)
File System: None
Partition Type: FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF
OS Can Be Installed: No
Media Type: Generic
Protocol: SATA
SMART Status: Verified
Disk / Partition UUID: 00002980-188B-0000-A938-00003F710000
Total Size: 475.0 GB (474999996416 Bytes) (exactly 927734368 512-Byte-Units)
Volume Free Space: Not applicable (no file system)
Device Block Size: 512 Bytes
Read-Only Media: No
Read-Only Volume: Not applicable (no file system)
Ejectable: No
Whole: No
Internal: Yes
Solid State: No
Also a partition named Boot OS X seems to be constantly mounted, even after restart, which has not been the case before.
Now, I have most of the data backed up, but can I somehow get my partition back without all the hassle?
Edit:
$ sudo gpt -r show /dev/disk1
gpt show: /dev/disk1: Suspicious MBR at sector 0
start size index contents
0 1 MBR
1 1 Pri GPT header
2 32 Pri GPT table
34 6
40 409600 1 GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B
409640 927734368 2 GPT part - FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF
928144008 262144 3 GPT part - 48465300-0000-11AA-AA11-00306543ECAC
928406152 615800
929021952 39294976 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7
968316928 2048
968318976 8388608 5 GPT part - 0657FD6D-A4AB-43C4-84E5-0933C84B4F4F
976707584 65551
976773135 32 Sec GPT table
976773167 1 Sec GPT header
$ sudo fdisk /dev/disk1
Disk: /dev/disk1 geometry: 60801/255/63 [976773168 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: DA 1023 254 63 - 1023 254 63 [ 409640 - 927734368] <Unknown ID>
3: AF 1023 254 63 - 1023 254 63 [ 928144008 - 262144] HFS+
4: 83 1023 254 63 - 1023 254 63 [ 929021952 - 39294976] Linux files*
Since I know that it was an OSX Journaled file system in a Core Storage Volume, can I somehow convince OSX of this fact and fix the partition? Do I maybe need to edit the partition table?
As suggested, I removed partitions 2 and 3 with
sudo gpt remove -i 3 /dev/disk1
diskutil umountDisk /dev/disk1
sudo gpt remove -i 2 /dev/disk1
Now the partition table is
$ sudo gpt -r show /dev/disk1
gpt show: /dev/disk1: Suspicious MBR at sector 0
start size index contents
0 1 MBR
1 1 Pri GPT header
2 32 Pri GPT table
34 6
40 409600 1 GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B
409640 927734368 2 MBR part 218
928144008 262144 3 MBR part 175
928406152 615800
929021952 39294976 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7
968316928 2048
968318976 8388608 5 GPT part - 0657FD6D-A4AB-43C4-84E5-0933C84B4F4F
976707584 65551
976773135 32 Sec GPT table
976773167 1 Sec GPT header
You have to edit the partition table and modify the type of disk1s2 (and correct the type of disk1s3) to get your main data partition back and make Boot OS X invisible:
- Log-in as admin
-
Open Terminal and enter
sudo gpt -r show /dev/disk1to get an overview
-
Unmount disk1:
diskutil umountDisk /dev/disk1 -
Remove partition 2 and 3:
sudo gpt remove -i 3 /dev/disk1 diskutil umountDisk /dev/disk1 sudo gpt remove -i 2 /dev/disk1 -
Re-add the partition 2 and 3
diskutil umountDisk /dev/disk1 sudo gpt add -b 928144008 -i 3 -s 262144 -t 426F6F74-0000-11AA-AA11-00306543ECAC /dev/disk1 diskutil umountDisk /dev/disk1 sudo gpt add -b 409640 -i 2 -s 927734368 -t 53746F72-6167-11AA-AA11-00306543ECAC /dev/disk1
The correct partition type of a Boot OS X partition is 426F6F74-0000-11AA-AA11-00306543ECAC (like a Recovery HD partition) and 53746F72-6167-11AA-AA11-00306543ECAC for a CoreStorage partition.
Update: gpt behaves strange because the partition table contains an MBR instead of an PMBR - the MBR has to be replaced by a PMBR:
- Reboot your Mac
-
Open Terminal and enter
sudo gpt -r show /dev/disk1to get an overview and all partition sizes/types
-
rebuilding the GUID partition table and destroying the bogus MBR
diskutil umountDisk /dev/disk1 sudo gpt destroy /dev/disk1 diskutil umountDisk /dev/disk1 sudo gpt create -f /dev/disk1 sudo gpt add -b 40 -i 1 -s 409600 -t C12A7328-F81F-11D2-BA4B-00A0C93EC93B /dev/disk1 sudo gpt add -b 409640 -i 2 -s 927734368 -t 53746F72-6167-11AA-AA11-00306543ECAC /dev/disk1 diskutil umountDisk /dev/disk2 diskutil umountDisk /dev/disk1 sudo gpt add -b 928144008 -i 3 -s 262144 -t 426F6F74-0000-11AA-AA11-00306543ECAC /dev/disk1 diskutil umountDisk /dev/disk2 diskutil umountDisk /dev/disk1 sudo gpt add -b 929021952 -i 4 -s 39294976 -t EBD0A0A2-B9E5-4433-87C0-68B6B72699C7 /dev/disk1 diskutil umountDisk /dev/disk2 diskutil umountDisk /dev/disk1 sudo gpt add -b 968318976 -i 5 -s 8388608 -t 0657FD6D-A4AB-43C4-84E5-0933C84B4F4F /dev/disk1