Model: ATA WDC WD7500BPVT-2 (scsi)
Disk /dev/sda: 750GB
Sector size (logical/physical): 512B/4096B
Partition Table: msdos
Disk Flags:

Number  Start   End     Size    Type      File system  Flags
 1      1049kB  19.3GB  19.3GB  primary   ntfs         diag
 2      19.3GB  19.4GB  105MB   primary   ntfs         boot
 3      19.4GB  733GB   713GB   primary   ntfs
 4      733GB   750GB   17.4GB  extended               lba
 5      733GB   750GB   17.4GB  logical   ext4



louis@louis-Aspire-3830TG:~$ sudo fdisk -l

Disk /dev/sda: 698.7 GiB, 750156374016 bytes, 1465149168 sectors
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: 0xd043b297

Device     Boot      Start        End    Sectors   Size Id Type
/dev/sda1             2048   37750783   37748736    18G 27 Hidden NTFS WinRE
/dev/sda2  *      37750784   37955583     204800   100M  7 HPFS/NTFS/exFAT
/dev/sda3         37955584 1431068671 1393113088 664.3G  7 HPFS/NTFS/exFAT
/dev/sda4       1431070718 1465144938   34074221  16.3G  f W95 Ext'd (LBA)
/dev/sda5       1431070720 1465144938   34074219  16.3G 83 Linux

Partition 5 does not start on physical sector boundary.