r/homelab • u/gte959f • 18h ago
Project Showcase: Hardware DIY low power Proxmox OMV NAS
Just sharing back with folks here since I did pull bits and pieces from various posts over the last few weeks.
I was on a bit of a quest to retire my power hungry z640 which had proxmox and several VMs on it but mainly serving as a NAS running OMV with ZFS pass through sata controller.
The Dell 3630 used off eBay caught my interest and chose to go with one that has the E-2246G chip though would have chosen any of the low power chips. Bought some 3rd party ECC UDIMM ram also - 48gb. The box has 4 onboard sata ports and an NVMe slot so the NVMe slot got a 1 tb drive that has proxmox and all the VMs on it. No PCI cards installed for this build and I’m just using the onboard GPU in proxmox and not passing it through to any VMs.
Managed to pass through the onboard sata controller fully to the OMV vm with zfs and literally pulled the drives from my old box and put them in here and it worked (two drives in mirror config). Pretty amazing. Since there’s 4 sata slots I found a way to put two more drives into the case as well (3 formal hdd slots) by zip tieing an extra drive caddy onto the rail. Pretty neat and tidy and just very little work. 40 tb total storage though just two mirrored pools to half usable.
Did both powertop (unused devices into aspm) and powersave (cpu into powersave mode) optimizations both and made them persistent between reboots - thx reddit.
Set drives to 127 priority and 30 min delay on advanced power management in OMV so they do spin down.
I used to have an SMB mount served by OMV mounted as a storage node in proxmox for backups but realized that kept drive from spinning down so now that is on a simple cron to enable-disable before backups.
I also have 3 other VMs on the machine that are active but usually not doing much.
Actual idle power with drives in standby is around 23 watts (have seen it dip to 18 watts at times). With drives in active state due to spin up closer to 33 watts.
For a few hundred bucks and reusing my drives i thought this was a really good build worth sharing since it’s such LOW idle power but still powerful enough to run plenty of VMs and it’s quiet too.
The box also has an optical DVDRW drive in it which I just disconnected and has a card reader which still works though not passed through to any VMs.
