https://community.hpe.com/t5/disk-enclosures/migrating-single-disk-to-raid1/m-p/3120356#M10285 You should be able to, as long as you do not initialize the array when you create it, i.e. the controller does not format the array, and you place the original disk as the first selected disk in the created array.<BR />Of course, you should backup also. You would not want to lose the data. Mon, 17 Nov 2003 06:21:31 GMT e4services 2003-11-17T06:21:31Z https://community.hpe.com/t5/disk-enclosures/migrating-single-disk-to-raid1/m-p/3120355#M10284 We have several ml350 with one harddisk and netware 6.<BR />We want to extend those system with an SA 641 controller and 2 new harddisks so we can make an raid 1 configuration.<BR />My question is can you connect an HD from an scsi single disk system to an SA controller and upgrade the single disk (=then raid 0) to an raid 1 configuration without doing an backup and restore.<BR /><BR />tia <BR />Leon Urbanus Sun, 16 Nov 2003 14:57:13 GMT https://community.hpe.com/t5/disk-enclosures/migrating-single-disk-to-raid1/m-p/3120355#M10284 Leon_20 2003-11-16T14:57:13Z https://community.hpe.com/t5/disk-enclosures/migrating-single-disk-to-raid1/m-p/3120356#M10285 You should be able to, as long as you do not initialize the array when you create it, i.e. the controller does not format the array, and you place the original disk as the first selected disk in the created array.<BR />Of course, you should backup also. You would not want to lose the data. Mon, 17 Nov 2003 06:21:31 GMT https://community.hpe.com/t5/disk-enclosures/migrating-single-disk-to-raid1/m-p/3120356#M10285 e4services 2003-11-17T06:21:31Z