BTRFS has no non-RAID option for Filesystem

lordzombieboy

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May 12, 2025
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I'm trying to set up a server with a primary NVMe SSD for speed, and a pair of mirrored enterprise HDDs that backs up the SSD as well as storing other information as it has a much larger storage capacity.

When installing Proxmox 8.4, it asks for the filesystem, of which I found BTRFS to be the best option for me and my use case, but there is no option to select a non-RAID variant for the bootdisk (I want the SSD to be both for boot and data separate from the HDDs, and the HDDs to be RAID1 with each other). Am I able to set up the configuration I want with BTRFS after initial install, if so, which option do I pick for now? And if not, is there a way for me to do it during this initial installation phase?

Thanks!

For reference:

Screenshot_20250512_164817_Gallery.jpg

Edit: After looking closer, I have the option to select DO NOT USE THIS for Harddisk 1 and 2, which should accomplish what I want for the bootdisk.
 
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When installing Proxmox 8.7
The latest version of Proxmox VE is currently 8.4.1.
it asks for the filesystem, of which I found BTRFS to be the best option for me and my use case, but there is no option to select a non-RAID variant for the bootdisk
RAID0 with a single drive is equivalent to non-RAID.
(I want the SSD to be both for boot and data separate from the HDDs, and the HDDs to be RAID1 with each other).
Install Proxmox VE on a single drive and add a mirror/RAID1 for the other drives after installation. The installer is rather simple and only installs a basic Proxmox VE.
I'm trying to set up a server with a primary NVMe SSD for speed
Don't use a COW or check summing filesystem like ZFS or BTRFS as those features reduce speed.
 
The latest version of Proxmox VE is currently 8.4.1.

RAID0 with a single drive is equivalent to non-RAID.

Install Proxmox VE on a single drive and add a mirror/RAID1 for the other drives after installation. The installer is rather simple and only installs a basic Proxmox VE.

Don't use a COW or check summing filesystem like ZFS or BTRFS as those features reduce speed.
Yep, sorry I wrote that version from memory and was wrong. I will be doing RAID0 with just the SSD on BTRFS. For me the benefits of BTRSF outweigh the slightly slower performance. After finding that I can set it to only go on one drive with BTRSF this helps a lot, thank you!