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"
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