On 2021-02-03 21:23, Andrew Luke Nesbit wrote:

On 03/02/2021 19:04, Cedric.dewijs@eclipso.eu wrote:

quoted

I am looking for a way to make a raid 1 of two SSD's, and to be able 
to detect corrupted blocks, much like btrfs does that. I recall being 
told about a month ago to use a specific piece of software for that, 
but i forgot to make a note of it, and I can't find it anymore.

Running SSD's in RAID1 has been contentious from the perspective that I 
have been researching storage technology.

Is there any serious, properly researched, and learned infornmation 
available about this?

The reason I ask is that, in a related situation, I have 4x high quality 
HGST SLC SAS SSD's, and I was seriously thinking that RAID0 might be the 
appropriate way to configure them.  This assumes a well designed backup 
strategy of course.

Is this foolhardy?

Andrew

Is there a reason why you are not considering Btrfs RAID1? It provides 
redundancy and checksums to protect against bit errors on either mirror. 
Remember that Btrfs RAID1 does not work the same way as mdadm's 
alternative.

RAID0 provides no fault tolerance at all. Is there any added performance 
you need from RAID0 in your application?

Forza