Javier Perez writes:
HiI have my /home partition on a 2TB HDD drive about half full. Should be doing regular backups but not in the habit.What is better? A. Purchase a second 2TB to create a Raid1 mirror or B. Purchase a second 4TB drive for backup purposes.
Since you already have an existing partition in use, using another drive for basic backup will be the path of least resistance. Others already explained that RAID and a backup drive are not the same thing; so this depends on what you want to do, but in this case adding a simple backup drive is the simplest one of the two.
I guess if you decide to go with RAID, you'd want to create a new RAID1 volume on the new drive, with just one partition, a degraded RAID1 volume. It should still be mountable, so you'll copy your existing partition to the new RAID1 volume, drop your existing partition, then add it to the RAID1 volume and have it sync back up. Just have to make sure that the new RAID1 volume is not larger than your existing partition.
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