Available 

The hot spares are running and ready to accept data, but are not currently being written to or read from. 

None. 

In-use 

This hot spare pool includes slices that have been used to replace failed components in a redundant volume.  

Diagnose how the hot spares are being used. Then, repair the slice in the volume for which the hot spare is being used. 

Broken 

There is a problem with a hot spare or hot spare pool, but there is no immediate danger of losing data. This status is also displayed if all the hot spares are in use or if any hot spares are broken. 

Diagnose how the hot spares are being used or why they are broken. You can add more hot spares to the hot spare pool, if desired.