4 on ms-dos partition table
A single MBR-Style disk can contain a maximum of four primary partitions.
IDE (Integrated Drive Electronics) can support a maximum of four primary partitions on a single hard drive. Alternatively, one of these primary partitions can be configured as an extended partition, which can contain multiple logical drives. This allows for a total of up to three primary partitions and potentially many logical drives within the extended partition.
4
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
i have a new hard disk so what i should do ?
A hard drive. Physically it is a single unit (but may have more than one surface or platter to store data). The drive has a 'reference' track - which tells the computer how the drive is divided. You can split a hard-drive into multiple partitions to separate different types of data.
It should have the same limitations as any other operating system if you solely work with physical volumes - 4 primary partitions on MBR, unlimited on GPT (though Windows will limit it to 128). Otherwise, if you use something like LVM, it would be unlimited logical partitions, across a single disk or multiple disks.
Yes, a particle can consist of only a single atom.
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
Yes. It's a noble gas and as such is a single atom.
no.
may consist of a single dwelling!