[SOLVED] Issues with nvme u2 disks not showing when plugged in

May 24, 2021
2
0
6
39
Hi,

Been googling alot to try to find something useful here, some might be useful for testing on non-prod equipment but since our servers are in prod i rather ask to get more direct solution.

Main question is why doesnt the U2 disks put into the server show up in the OS right after its getting plugged in. Only a good reboot will make it show.

Server hardware: Gigabyte R282-Z92 (BIOS R19 10/12/2020)
Bios settings: Do not have anything useful here, hard to extract from live system since the web gui bios part doesnt show much data (tried all vm hosts + differnet browsers.. buggy software)
Disks: Micron 9300 MAX 3.2TB U2 (firmware 11300DN0) (used in zfs "raid10" with a hot spare)
Proxmox: 6.3
Kernel: 5.4.78-2-pve

Sidenotes:
Same issues was on our supermicro host with both micron and intel U2 disks, so i am wondering if this migth not be a pure bios issue but maybe kernel boot settings?

This setup is close to perfect for our needs, but having to reboot to add new disks and hotswap is a huge issue as most of the vms are very production and dont like downtime at all.
So adding more space or swap out faulty disks needs to be on a hotswap level if possible.

Gigabyte mgnt web outputs when a new drive was added. But it wont show in the OS.
ID: 240 HDD8 sensor of type drive_slot logged a BPB Virtual Management Controller Event : Drive Presence was asserted

Let me know if more info is needed.

Thanks
 
Last edited:
I have micron 9300 MAX 6.5TB U2, and I don't see any problem to see them (/dev/nvmexxx) (supermicro motherboard). No special kernel tuning.


But I'm not sure to have tested hotplug / change....

I'll do tests tomorrow.
 
Last edited:
Do you have tried to rescan pci + enable device manually ?

"echo 1 > /sys/bus/pci/rescan"
"echo 1 > /sys/bus/pci/devices/0000:XX:00.0/enable"
1621884956367.png

last disk just showed up with rescan command.

A simple and nice command.
why doesnt the OS does this native..
And google stopped being my friend.

You made my day! Thanks