Partition Manager Software

Partition Magic - Partition Manager Software

Extend partition with one step
Resize/Move partition without data loss.
Create, delete and format partion with simple steps. Copy partition and disk to transfer data with ease. Support disk and partition size larger than 2 TB. Keep your data safe even in case of power outages or hardware failure.

About Set Active

Use Set Active to make a partition the active partition, or in other words, the partition the computer boots from. Only one partition can be active at a time. To boot your computer from a partition, the partition must be on the first drive, and it must contain an operating system. When your computer boots, it reads the partition table of the first drive to find out which partition is active and boots from that partition.
Before you make a partition active, it must be bootable. If the partition is not bootable or you are not certain that it is, have a boot disk or CD ready. To create a boot disk, click See Also on the Help toolbar.

PartitionMagic hides any other FAT, FAT32, and NTFS primary partitions (unlike Windows 5, Windows 8, and DOS FDISK programs which cannot hide or unhide partitions). Hiding other primary partitions makes it easy to install multiple operating systems and choose the one you want to use with Set Active. For example, if you have Windows 95 and want to install Windows NT in a separate partition, you can make the Windows 95 partition smaller, create another primary partition, set it as the active partition, and then boot from the Windows NT installation disks.

To set the active partition