Asus hyper m.2 x16 card v2 put it on a server

Here we go, I have to put these card on to my server with C620 chipset. I need fast local storage.
The card is not very expensive but i need 4×4 TB SSD on these server. So we started with a simple test. I bought 4x 16 GB Optane SSD for under 14 $ per piece. When it runs with this SSD so it will run also with the big ones.
That this runs we need a chipset that supports bifurcation with PCIe. With bifurcation you can split your 16x PCIe lane into 2×8, 4x4x4x4x or 8x4x4x. We need 4x4x4x4x every SSD needs 4x PCIe lanes. Would you read more about this topic look here https://blog.donbowman.ca/2017/10/06/pci-e-bifurcation-explained/

I have not really enough space. On this server there are also 4x 2080 TI graphics cards. It was very close that the card fit in it.

Next step was to configure the BIOS(UEFI) to talk correctly to this card. The automatic mode is not working. In automatic mode it detect only one SSD, the first one on the Asus card.

I used on the motherboard slot 10, this information is important to configured PE3 on CPU2 correct. We look in the manual of the motherboard to see which slot is connected with the CPU. Slot11 is not working there is not enough PCIe lanes only 4x. We need 16x to split into 4x4x4x4x
Let´s jump in to the BIOS.

On the BIOS follow the rabbit pictures.

We have to choose the right CPU. We use PE3 on CPU2

Change the IOU2 from Auto to 4x4x4x4, every SSD should runs with 4x PCIe lanes.

That was it.

Check under Linux with the command dmidecode -t 9

Ubuntu 20.04 mount cifs stale file handle

What a pain in the ass. If you use mount.cifs under Ubuntu 20.04 and now you have stale file handle to edit files and more.

We look in to the manpage from mount.cifs and there is a option to solve this issue.

noserverino Client generates inode numbers itself rather than using the actual ones from the server.

See section INODE NUMBERS for more information.

Let’s Encrypt Wildcard certificate how to

Org post see here

 

https://community.letsencrypt.org/t/getting-wildcard-certificates-with-certbot/56285

Reqeuirement access to dns records of the domain

 

wget https://dl.eff.org/certbot-auto
chmod a+x certbot-auto

./certbot-auto certonly –manual -d *.domain.example -d example.domain –preferred-challenges dns-01 –server https://acme-v02.api.letsencrypt.org/directory

You will be prompted to add two txt records to your dns server, you should be able to do this.

 

that´s all

 

 

Can’t locate Debian/AdduserCommon.pm in @INC (you may need to install the Debian::AdduserCommon module)

Ubuntu 16.04 is sometimes wtf.

How to escape this crazy error?

 

Preconfiguring packages …
Setting up systemd (229-4ubuntu21.1) …
Can’t locate Debian/AdduserCommon.pm in @INC (you may need to install the Debian::AdduserCommon module) (@INC contains: /etc/perl /usr/local/lib/x86_64-linux-gnu/perl/5.22.1 /usr/local/share/perl/5.22.1 /usr/lib/x86_64-linux-gnu/perl5/5.22 /usr/share/perl5 /usr/lib/x86_64-linux-gnu/perl/5.22 /usr/share/perl/5.22 /usr/local/lib/site_perl /usr/lib/x86_64-linux-gnu/perl-base .) at /usr/sbin/addgroup line 34.
BEGIN failed–compilation aborted at /usr/sbin/addgroup line 34.
dpkg: error processing package systemd (–configure):
subprocess installed post-installation script returned error exit status 2
Errors were encountered while processing:
systemd
E: Sub-process /usr/bin/dpkg returned an error code (1)

 

Use apt-file search AdduserCommon.pm on another Ubuntu VM. APT-File install separately on the maschine. So you can look which packet the file belongs to.

 

apt-file search AdduserCommon.pm
adduser: /usr/share/perl5/Debian/AdduserCommon.pm

now we reinstall the package adduser

apt-get –reinstall install adduser

Antoher way is copy the whole folder /usr/share/perl5/ from the working vm to the broken vm.