Le 16/05/2022 à 09:09, Wols Lists a écrit :

On 16/05/2022 07:47, Pascal Hambourg wrote:

quoted

Le 15/05/2022 à 21:29, Wol a écrit :

quoted

On 15/05/2022 19:39, Pascal Hambourg wrote:

quoted

Le 14/05/2022 à 15:46, Wols Lists a écrit :

quoted

Or the rewrite fails, raid assumes the drive is faulty and kicks it 
out. That's why you should never use desktop drives unless you know 
EXACTLY what you are doing!

What's wrong with desktop drives ?

Once things start going wrong, they go pear-shaped very fast.

https://raid.wiki.kernel.org/index.php/Timeout_Mismatch

I did not mean "in general", but in relation with "Or the rewrite 
fails, raid assumes the drive is faulty and kicks it out".

Well, the timeout mismatch is directly responsible for a non-faulty 
drive being kicked out the array ...

Thanks, I overlooked that line :
"the RAID code recomputes the block and tries to write it back to the 
disk. The disk is still trying to read the data and fails to respond".

On the other hand, I have seen faulty drives report success on write to 
an unreadable block then failing immediate read at the same location.