Partizione per installazione dual boot

[Silvio1970]

Ecco cosa ho trovato sul mio PC Windows 7:

Quando digito >cmd: bcdedit, ottengo \Windows\system32\winload.exe, quindi credo che la mia installazione di Windows 7 utilizzi il BIOS e non UEFI.
Quando vado su CMD e digito LIST DISK, non compare * nelle colonne DIN o GPT, quindi non so se il disco è partizionato in GPT o MBR.
Per quanto riguarda la partizione di avvio, vedo che in Gestione disco c'è una piccola partizione da 25 GB chiamata Partizione Primaria, che dovrebbe essere la partizione di avvio.
Inoltre, in Gestione disco, andando su Priorità/Volumi/Stile partizione, vedo "MBR Master Boot Record".
In DOS, "List partition" mostra:

https://ibb.co/DPByJSxY

Sempre da Gestione Disco vedo situazione Dischi dove la prima partizione di 25 Gb immagino sia quella di Boot

https://ibb.co/0Rt8F13t

Nell'installazione di Ubuntu io ho indicato manualmente la creazione delle partizioni come segue:

https://ibb.co/5xv1QC6R

Digitando “sudo fdisk -l” da Ubuntu live terminal ottengo:

ubuntu@ubuntu:~$ sudo fdisk -l
Disk /dev/loop0: 1.66 GiB, 1777532928 bytes, 3471744 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/loop1: 523.25 MiB, 548667392 bytes, 1071616 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/loop2: 925.91 MiB, 970883072 bytes, 1896256 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/loop3: 4 KiB, 4096 bytes, 8 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/loop4: 73.91 MiB, 77504512 bytes, 151376 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/loop5: 245.13 MiB, 257036288 bytes, 502024 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/loop6: 11.13 MiB, 11673600 bytes, 22800 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/loop7: 516.01 MiB, 541073408 bytes, 1056784 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/sda: 596.17 GiB, 640135028736 bytes, 1250263728 sectors
Disk model: Hitachi HTS54756
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos
Disk identifier: 0xaa9693fe

Device     Boot     Start        End   Sectors   Size Id Type
/dev/sda1            2048   52430847  52428800    25G 1c Hidden W95 FAT32 (LBA)
/dev/sda2  *     52430848  552536063 500105216 238.5G  7 HPFS/NTFS/exFAT
/dev/sda3       552536064 1250260991 697724928 332.7G  f W95 Ext'd (LBA)
/dev/sda5       552538112  943060991 390522880 186.2G  7 HPFS/NTFS/exFAT

Disk /dev/sdb: 57.73 GiB, 61991813120 bytes, 121077760 sectors
Disk model: DataTraveler 3.0
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x159d0d6d

Device     Boot Start       End   Sectors  Size Id Type
/dev/sdb1  *     2048 121077695 121075648 57.7G  c W95 FAT32 (LBA)

Disk /dev/loop8: 91.69 MiB, 96141312 bytes, 187776 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/loop9: 10.83 MiB, 11354112 bytes, 22176 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/loop10: 49.29 MiB, 51687424 bytes, 100952 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/loop11: 576 KiB, 589824 bytes, 1152 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/loop12: 209.98 MiB, 220176384 bytes, 430032 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/loop13: 112.56 MiB, 118026240 bytes, 230520 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/loop14: 304.88 MiB, 319684608 bytes, 624384 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/loop15: 2.69 MiB, 2822144 bytes, 5512 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/loop16: 2.69 MiB, 2818048 bytes, 5504 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
ubuntu@ubuntu:~$

[Silvio1970]

Aggiungo una cosa. Ma il fatto che da Gestione Disco io veda come prima partizione di 25 Gb una partizione Primaria ma 100% disponibile allora significa che Windows 7 non utilizza quella per il boot?