Logical

Changing Partition Type by Means of Acronis Disk Director

Acronis Disk Director allows you to change the type of a partition

Non-Removable 7.8 MB Of Unallocated Space On Hard Drive

Explanation of why there can be up to 7.8 MBytes of unallocated space that cannot be removed by usual means

Acronis Disk Director: Operation Errors Out with "Cannot process 'Disk #' because its sector size is unsupported"

Acronis Disk Director only supports disks with 512 bytes logical sector size