Stop all I/O activity to the DPE-AX. If the server connected to the DPE-AX is running the AIX, HP-UX, Linux, or Solaris
operating system, back up critical data and then unmount the file systems on storage-system virtual disks. Stopping I/O
allows the SP to save any cache data to the system drives, and may take some time. The length of time depends on
criteria such as the size of the cache, the amount of data in the cache, the type of data in the cache, and the target
location on the disks, but it is typically less than one minute. We recommend that you wait five minutes before
proceeding