As kenn2347 said, disk 7 is failing and powering off, when that happens the host spare (disk 14) also needs to power down and then come back up as disk 7 - it changes its identity to act as disk 7. It is best not to pull disks - especially if they are in the same raid group - you could cause a double fault on the raid group - this is not a good thing.  Let the disks fail - if disk 7 is really bad, it will create a fault on the array and either dial home or email home the fault.  glen
 We get the following message for 2 HD in a CX4 SAN Array.  Disk 14 is the hotspare disk.   Severity Critical Error Host CX4SPAStorage Array CKM00083500014 SPA Device Enclosure 0 Disk 7Description CRU Powered Down   Severity Critical Error Host CX4SPAStorage Array CKM00083500014 SPA Device Enclosure 0 Disk 14Description CRU Powered Down  We have reinserted both disks back into the array and the error message is gone.   1) Have we done the right thing ?  2) What is the meaning of that error message ?  Thanks  
Does "CRU Powered Down" message means that the HD is faulty ?