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How many partitions I can have

(3 posts)
  • Started 7 years ago by jameelkhan85
  • Latest reply from whs
  • Topic Viewed 10974 times

Posts: 0

I want to know 1. For 1 Tera hard drive how many partitions I can have ?
2. Does partitions depends on OS?
3. Why we usually use 4 partitions c,d,e,f and what are the different types of partition.

I know it's funny but would like an answer for it in a better way.

Posted 7 years ago
Posts: 0

PC Architecture limit is 4 partitions per physical drive. Drive letters though are a different story.

There are three types of partitions: primary partitions, extended partitions and logical drives. A disk may contain up to four primary partitions (only one of which can be active), or three primary partitions and one extended partition. In the extended partition, the user can create logical drives (i.e. "simulate" several smaller-sized hard drives). Drive total is 24, C: - Z:, however, if you have removable drives or attach network drives, you must leave drive letters for them to use.

That said, new technology is arriving to handle large, very large drives, GUID, see this MS article --> but you do need firmware (BIOS) support for this.

More info ==>

Irv S.

Posted 7 years ago
Posts: 0

To add to this excellent explanation by Irv:

. Extended partitions are really containers for the info of the logical drives (also referred to as logical partitions). Data cannot be stored in an extended partition.

. If you already have 4 primaries on one disk volume, do not attempt to create a 5th primary or an extended partition. Disk Management will convert all your partitions into Dynamic partitions and you will not be able to operate any more. Dynamic partitions are used e.g. for spanned drives in Raid setups.

. Should you start out with 4 primaries on your system (many OEM installations these days have already 4 primaries off the shelf), then you have to first convert one of the primaries to a logical partition before you proceed in creating additional partitions. You can do that e.g. with Partition Wizard ( ). Partition Wizard will also create the container (extended partition) in the process. Candidate for conversion to logical partition is the OS partition PROVIDED you have the 100MB active boot partition.

. For the future, we should expect a new scheme called EFI to replace the current BIOS scheme. That will give us a lot more options.

Posted 7 years ago

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