
Those partitions are called logical partitions, and there is effectively no limit to the number of logical partitions that us can create. Understanding Disk Extended Partitionīy tagging a partition as an extended partition, it is possible to create many more partitions under the extended partition. Thus, for each whole disk, there is a maximum of 15 partitions per disk because one minor number is used to describe the entire disk (for example /dev/sda), and the other 15 minor numbers are used to refer to partitions for that disk (for example /dev/sda1, /dev/sda2, etc). By convention, SCSI disks have a maximum of 16 minor numbers mapped to a single disk. Names without a trailing digit refer to the whole disk, while names with a trailing digit refer to a partition of that whole disk.
#HOW TO RUN A DISK CHECK ON LINUX FREE#
As far as the system is concerned that free space does not exist until it is partitioned. While it may be free, we cannot use it in that state. We can have multiple primary partitions, and the drive sizes can exceed 2 TB.Īny unallocated space is shown as Free. GPT overcomes the two limitations of MBR. While MBR is still in use, the limitations are what led to the development of GPT.

/dev/sda1 – The first partition of disk sda.


The first thing that we need to know is there is no C drive or E drive in Linux.
