Configure Raid using centos 7

[soulofangel]

If i already have 1 harddisk running centos 7.

Will i be able to just plug one similar harddisk in and configure it to use raid 1?

Or must i delete everything?



Thanks in advance

 

[davidktw]

If i already have 1 harddisk running centos 7.

Will i be able to just plug one similar harddisk in and configure it to use raid 1?

Or must i delete everything?



Thanks in advance

You can't upgrade a normal partition into part of a RAID array. It's quite unlike of the feature one will find with Microsoft Windows Dynamic Disk upgraded from Simple Disk.

However, on Linux, you can create a degraded RAID 1 with only 1 disk, copy all the data from the old disk into the new degraded RAID 1 array, make sure you can boot from the new array, then add the old hard disk into the degraded RAID 1 array for resilvering.

It's rather complicated, but a good exercise for knowledge, you can read up more from http://ubuntuforums.org/showthread.php?t=1832812