The CLI command for this operation is  charray  (see Example 6-24). No feedback is returned. Selecting  Swap Drive  allows the user to replace a drive in the array with another drive. The  other drive needs to have a use status of  Candidate  or  Spare . This action can be used to  perform proactive drive replacement, to replace a drive that is not failed but expected to fail  soon, for example, as indicated by an error message in the event log. Figure 6-61 shows the dialog box that opens. Select the member drive to be replaced and the  replacement drive, and click  Swap .  The exchange of the drives starts running in the background. The volumes on the affected  MDisk remain accessible during the process. The CLI command  charraymember  is used to perform this task. Example 6-25 shows  replacement of array member ID 7, that was assigned to drive ID 12, with drive ID 17. Example 6-25 Replacing array member with CLI (some columns are not shown) Figure 6-61 Swapping array member with another candidate or spare drive Example 6-24 Renaming array MDisk with charray IBM_2145:ITSO-SV1:superuser>charray -name Distributed_array mdisk1 IBM_2145:ITSO-SV1:superuser> Swap drive IBM_2145:ITSO-SV1:superuser>lsarraymember 16 mdisk_id mdisk_name member_id drive_id new_drive_id spare_protection  16 Distributed_array 6 18 1 16 Distributed_array 7 12 1 16 Distributed_array 8 15 1  <...> IBM_2145:ITSO-SV1:superuser>lsdrive id status error_sequence_number use tech_type capacity  16 online member tier_enterprise 558.4GB 16 17 online spare tier_enterprise 558.4GB 18 online member tier_enterprise 558.4GB 16 <...> IBM_2145:ITSO-SV1:superuser>charraymember -immediate -member 7 -newdrive 17  Distributed_array IBM_2145:ITSO-SV1:superuser> 258  Implementing the IBM System Storage SAN Volume Controller with IBM Spectrum Virtualize V8.2.1