> On 8/18/2017 1:46 PM, ToddAndMargo wrote:>> Hi All,
 >>
 >> Is there a way to create software raid 1 after the fact?
 >> Meaning, you already installed SL on a stand alone drive.
 >>
 >> -T
 >

On 08/18/2017 11:44 AM, Betts, Wayne wrote:
> Hello T,
> 
> I have successfully used a utility called Raider a couple of times: 
> http://raider.sourceforge.net/  It is proof that what you want to do can 
> be done.  Read the README, which is not terribly long.  I don't remember 
> the details of the systems used it on, but I recall being impressed at 
> the details it handled.  Everything it does can be done by hand with 
> various core utilities (which is what raider uses anyway) and it isn't 
> terribly hard to understand, but Raider handles a lot of the details 
> automatically, making the process less error-prone than trying to go 
> through everything by hand.
> 
> While it is possible to use Raider on a live, fully functioning system 
> to minimize downtime (other than a necessary reboot), you can and often 
> should run Raider in single-user mode.  There is a power down to 
> physically swap disks and boot from the new degraded array(s), after 
> which the new RAID array(s) begin syncing.
> 
> Of course, it is strongly recommended that you first clone the disk (or 
> at least make a remote backup of any important files) with a utility you 
> trust and are familiar with.  (I often use Clonezilla, but there are a 
> lot of options for this.)
> 
> -Wayne


Thank you!