15.Migrate data from any volume group other than rootvg to an unallocated drive. 196 IBM ^ Certification Study Guide- pSeries AIX System Administration 7 Chapter 7. System paging space To accommodate a large virtual memory space with . If the system is configured in the above manner, the first Disk report displays the message Disk History Since Boot Not Available instead of the disk statistics. Subsequent interval reports generated by the iostat command contain disk.