https://community.hpe.com/t5/disk-enclosures/how-to-install/m-p/2476204#M686 Thanks OrionQuest , your answer is correct and appreciated Tue, 06 Feb 2001 00:00:00 GMT Ayman Altounji 2001-02-06T00:00:00Z https://community.hpe.com/t5/disk-enclosures/how-to-install/m-p/2476202#M684 I have prolinat 800 server with 1-18GB H/D with NT running as PDC. <BR />I wanted to install smart array 431 controller with 3-new 18GB H/D along with old H/D to make it as RAID5. <BR /> <BR />How to install array controller without loosing data? Fri, 22 Dec 2000 00:00:00 GMT https://community.hpe.com/t5/disk-enclosures/how-to-install/m-p/2476202#M684 Ayman Altounji 2000-12-22T00:00:00Z https://community.hpe.com/t5/disk-enclosures/how-to-install/m-p/2476203#M685 If you are migrating from a standard scsi controller to an array controller you will have to back up all data, create your new array install your base so and restore from backup. Why you might ask. When an array controller is configured it writes a disc table to the add's whereas the standard scsi does not and likewise you cannot go from an array controller to a standard controller and not loose data. Thu, 28 Dec 2000 00:00:00 GMT https://community.hpe.com/t5/disk-enclosures/how-to-install/m-p/2476203#M685 Ayman Altounji 2000-12-28T00:00:00Z https://community.hpe.com/t5/disk-enclosures/how-to-install/m-p/2476204#M686 Thanks OrionQuest , your answer is correct and appreciated Tue, 06 Feb 2001 00:00:00 GMT https://community.hpe.com/t5/disk-enclosures/how-to-install/m-p/2476204#M686 Ayman Altounji 2001-02-06T00:00:00Z