[GLLUG] Establishing Software RAID1

[Daniel Griswold]

You can also create a raid1 volume using the second disk and a "missing"
disk. Copy all the data from the source to the new raid volume, then
rebuild the first disk into the array. 

But since you need a backup before attempting any disk changes, it may
be simpler to perform a backup, build, restore. 

For cables, I use Amazon and Monoprice. If I need it quicker, I use
Digilink Computers in Okemos. 

--Daniel 

On 2014-08-03 12:29, Jason L. Froebe wrote: 

> You could convert the ext4 file system to btrfs, add the second drive to the btrfs and then convert to raid 1. 
> 
> Jason 
> On Aug 3, 2014 9:21 AM, "Clay Dowling" <clay at lazarusid.com> wrote:
> 
>> That will indeed delete all of your files. Take a backup before fiddling with filesystem options. 
>> 
>> ------ Original message------ 
>> 
>> FROM: Chick Tower 
>> 
>> DATE: Sat, Aug 2, 2014 11:44 PM 
>> 
>> TO: linux-user at egr.msu.edu; 
>> 
>> SUBJECT:[GLLUG] Establishing Software RAID1 
>> 
>> I've found on-line instructions for setting up RAID1 with two disk 
>> drives on a system already running Linux. After using mdadm to create a 
>> RAID set on two partitions already formatted ext3, they then say to 
>> issue the command
>> 
>> mkfs.ext3 /dev/md0
>> 
>> Won't that erase anything already on the two drive partitions that make 
>> up md0?
>> 
>> Also, does anyone know where to buy SATA cables cheaply? I think I need 
>> to replace one that I suspect is faulty.
>> -- 
>> 
>> Chick
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