Re: Is there a test suite for Pi2/armv7 ?

On 21/07/2024 21:28, druck wrote:

On 21/07/2024 11:47, Ahem A Rivet's Shot wrote:

On Sun, 21 Jul 2024 10:44:03 +0100
The Natural Philosopher <tnp@invalid.invalid> wrote:
>

Oh indeed. My new server will feature two SMART enabled SSDs...one a
mirror of the other.
I am not interested in RAID. RAID increases availability, but does not
archive data

>
    You have a mirror - that's RAID. RAID is about smoothly surviving
drive failures. With any storage system there are two important factors -
mean time to data loss and probability of data unavailability.

 Ignoring whether its RAID or not, mirroring will protect you against a random failure of one of the drives, which was more useful in the spinning rust days when random mechanical failures were an issue.
 

I agree.

With SSD, write life is the main issue, and if you have two identical mirrored drives, you may find any write life issues, which are not random, occur at exactly the same time.
 

But never at exactly the SAME time.
Remember the primary drive gets written to all day long as stuff like this post is downmloaded, read and deleted.
The secondary gets a once a day rsync,
And, whilst I have never had an SSD wear out fromn writes in the past 8 years I have had one fail in a quite different way shortly after purchase.

So with any type of mirrored arrangement, make sure they are different makes or models of drive, so it is less likely they fail together.
 

They are not subject to the same usage pattern, and they are not made from the same components.
As long as they dont fail within 24 hours of each other
--
In a Time of Universal Deceit, Telling the Truth Is a Revolutionary Act.
- George Orwell