https://community.hpe.com/t5/msa-storage/msa-2012fc/m-p/1098477#M5015 This should work. The disk should be recognized when re-inserted, and the array will re-synchronize. <BR /><BR />I don't suggest you do this often, but once or twice to convince yourself that it works, you're fine. Remember that you *are* at risk until the rebuild has completed, and that the rebuild time will depend on the actual drive, the amount of concurrent activity, and the rebuild priority. Tue, 04 Aug 2009 01:02:33 GMT thomasr 2009-08-04T01:02:33Z https://community.hpe.com/t5/msa-storage/msa-2012fc/m-p/1098476#M5014 I have an MSA 2012FC with 12 disks 146gb.<BR /> Two of these disks form a mirror volume, and the mirror is used for the quorum of a cluster. I want to test that the mirror is working well. I want to hot-remove one of the two disks while the SAN is working, to test if the mirror (and the quorum) remain online.<BR /> It's safe to hot-remove suddenly the disk, and after that, hot-add the same to re-establish the mirror?<BR /> Thank you... Mon, 03 Aug 2009 07:53:02 GMT https://community.hpe.com/t5/msa-storage/msa-2012fc/m-p/1098476#M5014 Ivan Salvade 2009-08-03T07:53:02Z https://community.hpe.com/t5/msa-storage/msa-2012fc/m-p/1098477#M5015 This should work. The disk should be recognized when re-inserted, and the array will re-synchronize. <BR /><BR />I don't suggest you do this often, but once or twice to convince yourself that it works, you're fine. Remember that you *are* at risk until the rebuild has completed, and that the rebuild time will depend on the actual drive, the amount of concurrent activity, and the rebuild priority. Tue, 04 Aug 2009 01:02:33 GMT https://community.hpe.com/t5/msa-storage/msa-2012fc/m-p/1098477#M5015 thomasr 2009-08-04T01:02:33Z