Raid setup

[wireman]

I am thinking of setting up RAID arrays for use in a desktop running a Debian 11 distribution.

I propose to put the Debian 11 software in a RAID 1 array consisting of two HDDs.

I also propose to put the user data in a separate RAID 1 array consisting of another two HDDs.

Am I right in thinking that the Debian 11 Raid array cannot be set up using software Raid, but the user data
Raid array can be set up using software Raid ?

 

[Darren]

I'm not really sure having the OS on RAID is really necessary, assuming you're not storing critical data on the OS drive? Easy to make an image once it's configured and store that somewhere separately so you can rebuild it. I'd just use a smaller SSD for that and then use RAID 5 for the user data on 3 or more disks.

 

[beers]

The challenge with software RAID for the OS is that you'd need the OS to load dependencies from the array before it can access the array.

Your BIOS probably has an integrated RAID setting, there isn't a lot of overhead for RAID1 since you're just duplicating data to the other member.