I was just curious how many are mirroring their boot device and and is the mirror ZFS. Also is anyone RAIDZing their boot device. Going to do a reinstall after Dragonfish goes stable and was curious about the best setup for a boot device(s). Thanks!
-
Important Announcement for the TrueNAS Community.
The TrueNAS Community has now been moved. This forum has become READ-ONLY for historical purposes. Please feel free to join us on the new TrueNAS Community Forums
Boot mirroring or Raidz
- Thread starter jedwest
- Start date
PhilD13
Patron
- Joined
- Sep 18, 2020
- Messages
- 203
I have a boot mirror using the option during setup. You can upgrade from Cobia to Dragonfish without a reinstall.
As far as I know the only "RAID" mode supported for the boot pool is mirroring.
You can also go with a single boot drive, keep a current backup of the config file and if the boot drive fails, reinstall from a usb stick and import the config file. Store any app data on a data pool not the boot pool. Some people have success with that.
There are other unsupported ways of creating a boot pool, but you are on your own to solve any issues.
As far as I know the only "RAID" mode supported for the boot pool is mirroring.
You can also go with a single boot drive, keep a current backup of the config file and if the boot drive fails, reinstall from a usb stick and import the config file. Store any app data on a data pool not the boot pool. Some people have success with that.
There are other unsupported ways of creating a boot pool, but you are on your own to solve any issues.
danb35
Hall of Famer
- Joined
- Aug 16, 2011
- Messages
- 15,504
If you're mirroring it through TrueNAS (as opposed to using a RAID controller), yes, the mirror is ZFS.
This isn't a possible configuration with TrueNAS, and I can't imagine any reason you'd want to do this.
The only supported options are (all of) a single device, or (all of) two devices in a ZFS mirror. The latter is more robust, but probably unnecessary in most cases as long as you keep a reasonably up-to-date copy of your config file handy, unless uptime is critical.
- Joined
- Dec 30, 2020
- Messages
- 2,134
Our Resident Grinch has devised a highly sophisticated setup combining ZFS mirrors and hardware RAID if you really, really, REALLY want to make your boot resilient:
www.truenas.com
Otherwise, just keeping a copy of the configuration file works.
Highly Available Boot Pool Strategy
I've pounded a few versions of this out over the years, but I hate explaining over and over. TrueNAS allows a ZFS boot mirror pool to be created to increase the reliability of the NAS. This sounds great in theory, but there's a flaw. Due to...
www.truenas.com
Otherwise, just keeping a copy of the configuration file works.
