Description

The first partition on any GPT volume is a MSR (Microsoft Reserved Partition) partition, this MSR partition is created automatic by Windows System.

A Microsoft Reserved Partition is only created when a drive is formatted in a GUID (Globally Unique Identifier) partition table (GPT) format. This partition is required for GUID and must reside before the primary (Windows) partition. It is required for GPT partition drives. This partition can be viewed in the DISKPART tool, but it is not visible in Windows Disk Management.

In Veritas System Recovery the hidden partition destination will be seen as DiskNumber-PartitionNumber+1 if the hidden partition is created on a GPT drive since, the first partition will always be Microsoft Reserved Partition.

For GPT drive, the disk management shows only single partition but implicitly Windows creates MSR partition, this MSR partition can be seen in Diskpart:

In Disk Management

GPT partition in Diskpart

In Veritas System Recovery the hidden partition destination will be seen as DiskNumber-PartitionNumber+1 instead of DiskNumber-PartitionNumber if the hidden partition was created on GPT volume: