A partition type that is not shown is GPT, which is available with 64-bit Windows operating systems. GUID, or globally unique identifier, partition table (GPT) allows up to 128 partitions and volumes up to 9.4 ZB. GPTpartitioning is accomplished using the Disk Management tool or using the
diskpart command-line utility. GPTmakes it possible to have a backup partition table in case the primary partition becomes corrupt. A GPT disk can also have more than the MBR-based disk limit of four primary partitions.
Tech Tip
You lose data when converting to GPT
MBR-based partitions can be converted to GPTand vice versa, but data is not preserved. This is seen only with systems that have a UEFI BIOS. Back up data if you convert!
Special products can be used to partition a hard driveand also repartition without any data loss. Examples include Acronis’s Disk Director, EaseUS’s Partition Master, and Avanquest’s Partition Commander.
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