https://community.hpe.com/t5/disk-enclosures/a5856a-raid-controller-configuration/m-p/2732667#M4950 In short, No.<BR /><BR />I've just helped a friend out who was having issues with the 4Si cards.<BR />He had 2 of them and the only way to remove dependancy on a single card was to use the 4Si cards as RAID 0 and use Mirror-UX to mirror between the two 4Si LUN's created.<BR /><BR />This is a true RAID 0+1.<BR />That means loose a disk attached to both 4Si cards and loose your LVolume.<BR />Not nice but it does have redundancy between the cards.<BR />This was due to needing all the space.<BR /><BR />You could do the same thing with RAID 5 or 3 to remove the sudden death of RAID 0.<BR /><BR />A little complex but it does work, that is unless you are booting from the 4Si or don't have mirror-ux. Thu, 30 May 2002 00:35:21 GMT Trevor Roddam_1 2002-05-30T00:35:21Z https://community.hpe.com/t5/disk-enclosures/a5856a-raid-controller-configuration/m-p/2732666#M4949 Guys:<BR /><BR />I have a RP5470 with two A5856A 4Si controller cards installed. This system is connected to a SC10 disk system.<BR /><BR />Is it possible to configure the 4Si cards in a fail over fashion?. I want to eliminate the 4Si card as a single point of failure.<BR /><BR />Much thanks guys. Tue, 28 May 2002 14:49:10 GMT https://community.hpe.com/t5/disk-enclosures/a5856a-raid-controller-configuration/m-p/2732666#M4949 Donovan Israel Murray 2002-05-28T14:49:10Z https://community.hpe.com/t5/disk-enclosures/a5856a-raid-controller-configuration/m-p/2732667#M4950 In short, No.<BR /><BR />I've just helped a friend out who was having issues with the 4Si cards.<BR />He had 2 of them and the only way to remove dependancy on a single card was to use the 4Si cards as RAID 0 and use Mirror-UX to mirror between the two 4Si LUN's created.<BR /><BR />This is a true RAID 0+1.<BR />That means loose a disk attached to both 4Si cards and loose your LVolume.<BR />Not nice but it does have redundancy between the cards.<BR />This was due to needing all the space.<BR /><BR />You could do the same thing with RAID 5 or 3 to remove the sudden death of RAID 0.<BR /><BR />A little complex but it does work, that is unless you are booting from the 4Si or don't have mirror-ux. Thu, 30 May 2002 00:35:21 GMT https://community.hpe.com/t5/disk-enclosures/a5856a-raid-controller-configuration/m-p/2732667#M4950 Trevor Roddam_1 2002-05-30T00:35:21Z