1.5 Applicability Statement
The benefits of the structures defined in this document include:
The ability to represent a large virtual disk size up to 64 TB.
Support for larger logical sector sizes—up to 4 KB—for virtual disks, which facilitates the conversion of 4-KB sector physical disks to virtual disks.
Support for large block sizes— up to 256 MB—for virtual disks, which enables fine-tuning block size to match the I/O patterns of the application or system for optimal performance.
A log to ensure resiliency of the VHDX file to corruptions from system power-failure events.
A mechanism that allows for small pieces of user-generated data to be transported along with the VHDX file.
Optimal performance, through improved data alignment, on host disks that have physical sector sizes larger than 512 bytes.
Capability to use the information from the UNMAP command, sent by the application or system using the virtual hard disk, to optimize the size of the VHDX file.