16 online candidate tier_enterprise 558.4GB  <...> Drive list shows  Status  of each drive. It can be  Online, which  means that drive can  communicate with disk enclosure where it is installed. Drive status  Offline  indicates that there  is no connection with it. Its status might be failed or physically removed. Drive  Use  defines its current role. The following use roles are available: The use that can be assigned depends on the current drive use. These dependencies are  shown in Figure 6-25. GLYPH<SM590000> Failed : The drive is not a part of the array configuration and is waiting for a service action. GLYPH<SM590000> Member : The drive is part of a (T)RAID or DRAID array.  GLYPH<SM590000> Spare : The drive is a hot spare. It is protecting RAID arrays. If any of the traditional array  members fails, it becomes array  Member .  GLYPH<SM590000> Candidate : The drive is owned by the system, and is not currently part of the RAID  configuration. It is available to be used in an array MDisk. GLYPH<SM590000> Unused : The system has access to the drive but was not told to take ownership of it. Most  actions on the drive are not permitted. This is a safe state for newly added hardware. Figure 6-25 Allowed usage changes for internal drives Note:  To start configuring arrays in a new system, all  Unused  drives need to be configured  as  Candidates . Initial setup or Assign storage GUI wizards do that automatically. A number of actions can be performed on internal drives. To perform any action, select one or  more drives and right-click the selection, as shown in Figure 6-26 on page 210. Alternatively,  select the drives and click  Actions .  Chapter 6. Storage pools  209