Minimizing writes to USB device the system's installed on

[PMoxSudo]

Hello,

I run Proxmox on a hp g8 microserver(ms) at home for personal use.

Debian was installed on a usb3 device in the internal usb 2 port.

The reason I had to go with the USB solution was that I don't have a spare ssd for OS installation and the onboard sata/raid card wasn't recognizing my wd reds, so had to plug the 4 bay thingie into a flashed dell h200.

The ms has two wd reds in software raid 1, mounted at /home.

I've formerly encountered heavy IO wait times due to everything except for /home being on the usb.

I've finally managed to move /var and /usr to /home/{var,usr} and symlinked them right.

So far this has reduced the visible IO wait time from 10-40% to 1-2%.

Anything else that should be moved to /home to further reduce the IO wait times I'm currently having? Maybe /etc/pve?

I know this isn't supported etc etc, I'm just asking for opinions here.

 

[LnxBil]

Why don't you reinstall on the two disks with ZFS? This will solve your problems, is supported (and therefore a ton of documentation available) and you remove your single point of failure.

... and yes ... I read "personal use", but if you usb stick dies you will loose your OS and you configuration files (if they are not backed up). You already have a working software raid, so use it for everything. PVE is not that big, so you'll not "waste" a lot of space.