On 08/18/2017 11:56 AM, ToddAndMargo wrote:
> 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!
In case anyone is wondering, to get your status:
# cat /proc/mdstat
Look for "U"'s to make sure each drive is "up"
