Hello, i'm not a Tech Expert but I since I ran out of space on a partition of Windows 10, I went to Disk Utility on Mac OS X El Capitan (Beta), I resized Bootcamp. Restarted my MacBook, I was holding ALT until I see that the Windows Partition was missing and I only saw 'Macintosh HD'. Can anyone help me on this?
MacBook Pro, Other OS
What do you suggest as the best way to backup a Bootcamp partition? I run Time Machine to a Time Capsule and CCC to a Thunderbolt drive (stored offsite) once a week.
There is nothing much on Bootcamp really. I just have it for reference/testing odd things plus Steam and Scrap Mechanic on it for the kids 🙂.
If you do not want to invest in an external back up, I suggest these
1. create a USB Recovery disk, and,
2. create a Windows System Restore point on a weekly basis.
You can always recover to the previous week's state.
I still have some issues!
Had them for a while infact. Not sure it's related so may be best for me to start another thread?
Anyway I'll provide as brief a summary as I can...
Occasionally I wouldn't be able to boot into the Mac partition. A no access symbol would appear as the progress bar nears completion. I could boot into Recovery and/or Internet recovery where in Disk Utility the whole hard drive is marked as uninitialised and inaccessible as if it was encrypted with Filevault (it was previously but I unencrypted) and then not do anything to it but reboot and the Mac would start fine using the Mac partition. The reoccurrence of this seemed to vary related to macOS Sierra Public Beta updates.
At some point a while back I could not boot into the Mac partition at all, I gave up and switched to booting from my thunderbolt Carbon Copy Clone which I still am still using... which is far from ideal... any ideas? The odd thing is I can hold down option and see the seperate Mac, Windows and EFI (recovery) partition but when I boot into Recovery and Disk Utility I cannot see those partitions, again as if the whole disk is encrypted. Trying to reformat the HD from Recovery or via Target Disk Mode fails as if it is encrypted too.
Grateful for any pointers and if you need further info please let me know.
1. Is your W10 an EFI installation?
2. Are you on any Beta OS X version currently?
3. Does System Preferences -> Security -> FileVault show it as being enabled? Was it decrypted using a Beta version of OS X?
Can you post the output of
diskutil list
diskutil cs list
In answer to your comment (and a load of the thread) that Apple deleted as I dared to mention pre-release software....
Loner T wrote:
Bootcamp Partition Missing When Booting
The three icons you see do not validate the entire drive. If you notice there are no partitions, when you look at the disk in Disk Utility. Are you able to select the partitions shown in the boot manager and boot the various OSes. The Windows and EFI Boot is confusing. You should have three icons, OS X, Recovery HD and Windows. There is a lingering EFI Boot entry in the Mac's EFI partition.
Can you test each of these three icons and check which ones work properly? We can go further based on what you find.
None of these partitions work properly.
The macOS partition displays the Apple logo and the progress bar moves across all the way until the 'no access' symbol.
The EFI partition (which I know is misnamed but pretty sure it was named as such way before these issues occurred) displays the Apple logo and the progress bar moves across all the way until the 'no access' symbol.
The Windows one flashes up some text about SATA and then just a flashing cursor.
The Recovery partition works fine.
I take your point about the hard drive probably being faulty. A pain to crack this thing open again including purchasing new adhesive strips etc. so I will do that when I can but I may bring this issue up on the Developer Forums first to see if there have been any similar experiences.
Many thanks for your help.
The SATA access to the internal SSHD are failing which is causing so much grief. It is indeed a pain to open an iMac and mess with the internal drives. Do you have a warranty on the SSHD from Seagate?
Hi, I eventually got around to slicing open this iMac. A standard HD is in and working fine. The SSHD is out and working fine too. Read a bit online that the SATA cable doesn't like Fusion Drives... seems odd to me but certainly seems to have been the problem in this case. Thanks for all of your help on this. Cheers!
The SATA cable should be fine with SSHD. The issue is most likely a timing issue when commands get issued and responses come back. The cache used to mimic standard Fusion setup is different from the standard Fusion setup. The standard Fusion implementation is a two-drive SSD/HDD combination on two separate SATA connections.
It is good that you are back to a working state.
Please post the output of the following Terminal commands from the OSX side?
diskutil list
diskutil cs list
sudo gpt -vv -r show /dev/disk0
sudo fdisk /dev/disk0
The "sudo" commands will prompt for your password, and it will not be echoed back. You may also see a warning about improper use of "sudo" and potential data loss due to "abuse" of the command.
What does it do exactly?
These commands will show the current partition state of your disk.
That didn't work, is there another step I need to do?
Your GPT output looks reasonable.
Please also run the following command (this shows the Windows NTFS header, if available).
sudo dd if=/dev/rdisk0s4 count=1 2>/dev/null | hexdump -C
The commands should individually produce output similar to the following...
diskutil list
/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *1.0 TB disk0
1: EFI EFI 209.7 MB disk0s1
2: Apple_HFS Macintosh HD 741.7 GB disk0s2
3: Apple_Boot Recovery HD 650.0 MB disk0s3
4: Microsoft Basic Data rMBPBCMP 258.0 GB disk0s4
diskutil cs list
No CoreStorage logical volume groups found
sudo gpt -vv -r show /dev/disk0
Password:
gpt show: /dev/disk0: mediasize=1000555581440; sectorsize=512; blocks=1954210120
gpt show: /dev/disk0: Suspicious MBR at sector 0
gpt show: /dev/disk0: Pri GPT at sector 1
gpt show: /dev/disk0: Sec GPT at sector 1954210119
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 1448624648 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC
1449034288 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC
1450303824 1712
1450305536 503904256 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7
1954209792 295
1954210087 32 Sec GPT table
1954210119 1 Sec GPT header
sudo fdisk /dev/disk0
Disk: /dev/disk0 geometry: 121643/255/63 [1954210120 sectors]
Signature: 0xAA55
Starting Ending
#: id cyl hd sec - cyl hd sec [ start - size]
------------------------------------------------------------------------
1: EE 0 0 2 - 25 127 14 [ 1 - 409639] <Unknown ID>
2: AF 25 127 15 - 1023 54 16 [ 409640 - 1448624648] HFS+
3: AB 1023 54 17 - 1023 60 39 [1449034288 - 1269536] Darwin Boot
*4: 07 1023 87 51 - 1023 238 3 [1450305536 - 503904256] HPFS/QNX/AUX
Alright, what shall I do next?
Please post the output of
sudo fdisk /dev/disk0
Bootcamp Partition Missing When Booting
