Slow parity nvme only

[Zc0rp]

Hi all,

 

I've got a questin, I have placed an nvme ssd as array and a nvme as parity but as you see in the screenshot its extremely slow on building parity. Anyone has an idea how to fix it?



 

[itimpi]

You should provide your system’s diagnostics so we can give sensible feedback.

 

my guess is one of the drives is having problems but without diagnostics that is just a guess.

[Zc0rp]

Just now, itimpi said:

You should provide your system’s diagnostics so we can give sensible feedback.

 

my guess is one of the drives is having problems but without diagnostics that is just a guess.

 

 

both drives are new, the one in the array i've used for about a week and performs great. the second one (parity) i received today i have to admit im using an pci riser for the ssd but i've tested that beforehand and i've got a speed of about ±700MB/s and with parity build it doesn't go above 40-50...

un-diagnostics-20211105-1432.zip

[trurl]

Note that SSDs in the array cannot be trimmed

[Zc0rp]

6 minutes ago, trurl said:

Note that SSDs in the array cannot be trimmed

yes i've read that. i'm thinking about switching to btrfs because of the discard=async mount option. This should fix it if i've read it correctly?

[Zc0rp]

update:

 

I've installed the latest update for unraid and rebooted, now suddenly the speed is what it should be but i dont't understand why...