https://community.hpe.com/t5/hpe-eva-storage/msa-controller-removal/m-p/5069298#M54959 No, you cannot simulate a controller failure that way. Depending on the controller revision and its position you risk freezing the MSA !!<BR /><BR />Controller failover is initiated by the hosts. If you want to test that - just pull the fiber cable of the active controller and let the hosts do some I/O. Tue, 18 Sep 2007 14:56:53 GMT Uwe Zessin 2007-09-18T14:56:53Z https://community.hpe.com/t5/hpe-eva-storage/msa-controller-removal/m-p/5069297#M54958 If I have two controllers, can I remove 1 from the front to mimic a controller failure to see what happens? Will there be any problems when I reinsert it?<BR /><BR />thanks Tue, 18 Sep 2007 11:59:55 GMT https://community.hpe.com/t5/hpe-eva-storage/msa-controller-removal/m-p/5069297#M54958 Blake Edwards 2007-09-18T11:59:55Z https://community.hpe.com/t5/hpe-eva-storage/msa-controller-removal/m-p/5069298#M54959 No, you cannot simulate a controller failure that way. Depending on the controller revision and its position you risk freezing the MSA !!<BR /><BR />Controller failover is initiated by the hosts. If you want to test that - just pull the fiber cable of the active controller and let the hosts do some I/O. Tue, 18 Sep 2007 14:56:53 GMT https://community.hpe.com/t5/hpe-eva-storage/msa-controller-removal/m-p/5069298#M54959 Uwe Zessin 2007-09-18T14:56:53Z https://community.hpe.com/t5/hpe-eva-storage/msa-controller-removal/m-p/5069299#M54960 Thanks Uwe! Tue, 18 Sep 2007 16:01:38 GMT https://community.hpe.com/t5/hpe-eva-storage/msa-controller-removal/m-p/5069299#M54960 Blake Edwards 2007-09-18T16:01:38Z