cannot install windows 10 partition table discrepancy
I had windows 7 running in a bootcamp partition for over a year , no problem with MACOS Yosemite. With Microsoft offer I decided to upgrade to windows 10.
Upgrade went fine ,I then upgraded the bootcamp drivers OK. Windows10 running fine.
Then I upgraded to El Capitan, still no problem. Then, windows 10 started to give me some problem (start menu critical error) which I did not manage to fix , I decided to revert to rollback to windows7 . When the windows 7 started to boot : I got an error ApppleHFS missing or corrupt.
I figured out that it must be because I upgraded to el capitan in the meantime: so replaced AppleHFS.sys and Applemnt.sys by the windows7 versions and could boot windows7 OK. I thought I would then try a clean install of Windows10 : started bootcamp assistant, deleted windows 7 : bootcamp assistant shows only one partition which I thought was OK, then I repartitioned the MAC HD using the partition slider and chose a smaller size for the MAC OS (200GB) and a lager Bootcamp partition: 702GB
When I try to install Windows10, the partition table displayed by the windows installer is the old one! I did not try to go any further
I read some of the other posts and tried to give information which should be useful
It looks like a MBR problem but I do not understand it. Thanks for any help
the disk utility sees this partition table:
jean-luc$ 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_HFS Macintosh HD 297.3 GB disk0s2 !!
3: Apple_Boot Recovery HD 650.0 MB disk0s3
4: Microsoft Basic Data BOOTCAMP 702.0 GB disk0s4
/dev/disk1 (external, physical):
#: TYPE NAME SIZE IDENTIFIER
0: FDisk_partition_scheme *30.8 GB disk1
1: DOS_FAT_32 WINDOWS10 30.8 GB disk1s1
-------------------------------------------------------------------------------- --------------------------------------------
I do not quite understand : the sum of the 2 main partition (MACOS + Bootcamp 297.3+ 702) is 999.3 gb!!!! where it was 930GB before
I installed gdisk and run:
Sudo disk /dev/disk0
Password:
GPT fdisk (gdisk) version 1.0.1
Warning: Devices opened with shared lock will not have their
partition table automatically reloaded!
Partition table scan:
MBR: hybrid
BSD: not present
APM: not present
GPT: present
Found valid GPT with hybrid MBR; using GPT.
Command (? for help): p ---------------------->this does not reflect the changes done
Disk /dev/disk0: 1953525168 sectors, 931.5 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): 58FD0FA2-DA3C-4038-8807-7C54D7EB1C97
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 1953525134
Partitions will be aligned on 8-sector boundaries
Total free space is 2829 sectors (1.4 MiB)
Number Start (sector) End (sector) Size Code Name
1 40 409639 200.0 MiB EF00 EFI System Partition
2 409640 581161831 276.9 GiB AF00 Customer
3 581161832 582431367 619.9 MiB AB00 Recovery HD
4 582432768 1953523711 653.8 GiB 0700 BOOTCAMP ===============> this was the previous partition size!!!
Command (? for help): i ?
Partition number (1-4): 4
Partition GUID code: EBD0A0A2-B9E5-4433-87C0-68B6B72699C7 (Microsoft basic data)
Partition unique GUID: E1504186-A421-4E8A-812C-48C031EE2248
First sector: 582432768 (at 277.7 GiB)
Last sector: 1953523711 (at 931.5 GiB)
Partition size: 1371090944 sectors (653.8 GiB)
Attribute flags: 0000000000000000
Partition name: 'BOOTCAMP'
-------------------------------------------------------------------------------- -------------------
Downloads jean-luc$ sudo fdisk /dev/disk0
Password:
Disk: /dev/disk0 geometry: 121601/255/63 [1953525168 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: AF 1023 254 63 - 1023 254 63 [ 409640 - 580752192] HFS+
3: AB 1023 254 63 - 1023 254 63 [ 581161832 - 1269536] Darwin Boot
4: 0B 1023 254 63 - 1023 254 63 [ 582432768 - 1371090944] Win95 FAT-32
iMac (21.5-inch, Late 2012), OS X Yosemite (10.10.3), installed today