Disk volumes (disk spanning) are not a fault-tolerance strategy. It is simply a way of combining multiple partitions into a single, logical disk. This does not increase disk performance. Volume sets are created using the Disk Administrator utility. Select the first free partition, then hold down the Ctrl key and select the others. Then select the Create Volume Set option from the Partition menu. Once a volume set has been created, it can also be extended using the Create Extended Volume Set. Only volume sets formatted with NTFS can be extended. A volume set cannot contain mirrored or striped components in it composition.