If you are running Proxmox, you might occasionally encounter an issue where your ZFS pools fail to import automatically after a reboot. While you can fix this manually each time, there is a simple way to make the solution permanent.
The Problem
After a restart, your ZFS pool might be missing from the Proxmox GUI or the command line. Usually, you can bring it back temporarily using:
zpool import <pool_name>However, this manual step is frustrating to perform after every reboot.
The Permanent Solution
The issue often occurs because the zfs-import-scan.service skips the import process if it doesn’t see a specific cache file. We can bypass this check by creating a systemd override.
Follow these steps:
1. Create the override directory:
mkdir -p /etc/systemd/system/zfs-import-scan.service.d/2. Create and edit the override file:
nano /etc/systemd/system/zfs-import-scan.service.d/override.conf3. Add the following lines to the file to disable the file-check condition:
[Unit] ConditionFileNotEmpty=4. Reload the systemd daemon to apply the changes:
systemctl daemon-reloadFrom now on, Proxmox will scan and import your ZFS pools automatically during the boot sequence, even if the cache is empty.