RAID5 is one of the levels that can be added to after creation. I think you should boot from the install CD and read the mdadm man page. It contains all the information you need to do what you want. That said, when you try to build the 4-drive array, do you get any errors reported? You may need to set the partition type to Linux MD RAID for the new drive if you intend to use the mdadm hook to assemble the array. On Jan 22, 2010 1:15 PM, "Dwight Schauer" <dschauer@xxxxxxxxx> wrote: Can you add a drive to an array after it has been built? I know you can add a hot spare, or remove a drive and add another, but I did not think you could increase N, where the size of the array is N-1 * size of each drive. How is the raid going to know which is data and which is parity? Of course I could be wrong. On Fri, Jan 22, 2010 at 12:03 PM, Louis Brazeau <lbrazeau@xxxxxxxxx> wrote: > On Fri, Jan 22, 2010...
