I recently had to manually invoke a hot spare in a VNX 5200, but in Unisphere the option was greyed out.
On the CLI the command wasn’t supported. Now what?
According to https://support.emc.com/kb/184890 the proper command is now
naviseccli -h [ip of one SP] copytodisk [source-disk] [hot spare]
Using the “getdisk” command will show you the actual rebuild has started.
Bare in mind that the way to address disks is in the format “Bus_Enclosure_Disk”, so for example 1_2_3 means disk 3 (the 4th disk) in enclosure 2 on bus 1.
In Unisphere you can actually see the progress of the rebuild: