Logical Drives
yes
A map to the partitions on the hard drive. This table tells BIOS how many partitions the drive has and how each partitions is divided into one or more logical drives, which partition contains the drive to be used for booting (called the active partition), and where each logical drive begins and ends.1-map to the partitions on on the hard drive2-information about where each logical drive is located, where it starts and where it ends3-which partition contains the drive to be used for booting (the active partition)The first is a map to the partitions on the harddrive,and how they are divided, the second, which partition contains the drive to be used for booting this is called the "Active Partition", and third where each logical begin and ends.
You have to create the primary partition, which will create a drive with assigned letter for you. Or you can create the extended partition where you can create logical drives it can be more than 1.
logical drives
As many as it can handle (how big it is). And adding partitions does not make more space. It's like putting a brick wall in the middle of a football field. :-P This is depend on your disk style, if your disk is MBR, you could only create four primary partitions or three primary partitions with one Extended partition (you could create many logical partition under extended partition) at most If your disk style is GPT, you could create as many as you can. here is an article about how to make partition from http://www.partition-magic-windows7.com/res/create-partition-windows7.html
Typically you can only have 4 primary partitions per hard drive if you are using the MBR partition layout scheme. If you need more partitions than the maximum allowed (4), then there is a way to get many more partitions with only one hard drive.By creating an extended partition you can have as many logical partitions as you need within that extended partition, thus you can have more than only four partitions. You can have 3 primary partitions and one extended partition (for a total of 4), and inside the extended partition you can have as many logical partitions as you need.The one thing to keep in mind is that any type of Windows Operating System needs to be installed in a primary partition, otherwise you cannot boot into it. Windows XP in particular, needs to be installed in the first primary partition. For everything else, you can create as many logical partitions as you want inside the extended partition.
There's a limit to the number of primary partitions per drive, 4. In order to get more than 4 drives out of one (if this takes your fancy) then you use an extended partition. To a low level program which doesnt speak fluent windows, everything on your extended partition appear as a single drive. Other than this their is no real advantage to extended partitions over primary partitions, but at windows level no significant disadvantage either
The primary disk partition is the main partition that your operating system is on your hard drive. If you only had 1 OS on your computer such as Windows, then you would have two partitions, 1 would be a backup/recovery that includes that boot manager, and the second partition (the primary) would be the one that includes all of your files and the OS itself.
Modern disk drive construction more or less requires drives to have at least one partition. Whether the drive is internal or external is immaterial.
On MBR partitioned hard-drives only 4 primary partition can be created. (Use extended and logical partitions to create more partitions).
Primary partition is like main entrance of your house. When the operating system boots (starts up) it has to access your primary drive and RAM to load operating system. Extended partitions are the fractions separated from primary drive for data storage purposes.
when installing your operating system you will create them, BE CAREFUL with out a program like partition magic, once you partition a Hard drive it is permanent.