Using RAID 0 as secondary storage

[skrippi]

I have a NVME m.2 SSD as system drive and want to set up my secondary storage with two HDD drives as raid 0.

Know in every forum or video I'm seeing that setting up raid 0 will make me lose all data. 

Is setting up raid with those two HDDs really making me lose data on my nvme SSD? 

[Eighjan]

26 minutes ago, skrippi said:

I have a NVME m.2 SSD as system drive and want to set up my secondary storage with two HDD drives as raid 0.

Know in every forum or video I'm seeing that setting up raid 0 will make me lose all data. 

Is setting up raid with those two HDDs really making me lose data on my nvme SSD? 

No; a RAID failure will only affect the RAID itself, not any other drives unconnected to it.

RAID 0 is only advisable if you have a spare drive on hand to drop into it in case of failure... so if you want to build a RAID 0, it's best to actually buy THREE drives, even if you only use two in the RAID.

[skrippi]

26 minutes ago, Eighjan said:

No; a RAID failure will only affect the RAID itself, not any other drives unconnected to it.

RAID 0 is only advisable if you have a spare drive on hand to drop into it in case of failure... so if you want to build a RAID 0, it's best to actually buy THREE drives, even if you only use two in the RAID.

So you mean a combination of raid 0 and 1?

[Eighjan]

14 minutes ago, skrippi said:

So you mean a combination of raid 0 and 1?

No.

Both RAID 0 & RAID 1 use 2 drives, 0 is for speed; 1 is for security.

 

RAID 0 makes ONE copy of your data across both drives.

RAID 1 makes two copies of your data, one on each drive.

 

NEITHER offers parity to be able to rescue the data if a SINGLE DRIVE fails.

 

The lowest tier of RAID to offer parity as an option is RAID 5... but that needs a minimum of three (identical) disks; read that as 4 required to cover a fail.

 

https://en.wikipedia.org/wiki/Standard_RAID_levels

 

Edited June 28, 2021 by Eighjan