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Thx, for the hint!!! I did not know that. So you saved me a lot of work/time moving my data around. I will stick to xfs, as it is. Thx a lot again 😃

Thx for the hint. Work is done and all is working. Maybe next time i will try your method. P.S.: Now to my bigger work... convert array from XFS to ZFS... 😅

Thanks @JorgeB , confirmed exactly that on my system (combined Boot+Data pool, XFS data partition) - Slots dropdown to add a 2nd device just wasn't offered. Went the backup + recreate route: backed up the cache data via rsync, built a temp USB stick with the same Unraid version, copied over config, booted from it, removed the old pool, ran the onboarding wizard again selecting both devices (NVMe + SATA SSD) with RAID1 for Data+Metadata, then restored the cache data via rsync afterward. One gotcha worth mentioning for others: after recreating the pool, "Auto" format picked BTRFS instead of ZFS. To fix it I had to stop the array first (only then "Remove Pool" became available), explicitly select zfs in the filesystem dropdown on the Main page, start the array again, then format. All good now, running as a ZFS RAID1 mirror cache. Thanks for the help!

@JorgeB Two followup questions: Size, here are the sizes of the current drives in bytes: Unraid NVME (boot/cache (with appdata)): 1000204886016 Spare SATA SSD1 (Crucial): 1000204886016 Spare SATA SSD2 (Verbatim): 1024209543168 I am tending to the crucial because it's 100% TLC flash. As you can see the size is identical and not smaller. Just to be sure, will this this work with the crucial? What happens if i'll add it and it fails regarding size. Is my data lost? My boot is zfs and cache (where also appdata lives) is xfs. Does adding raid mirror on slot 2 work without zfs/btrfs on cache partition? Or do i have to convert it (backup, reformat, restore) it to btrfs or zfs for this to work? Thanks a lot for your help. Just dont want to mess up something 😅

thx a lot for the fast answer. I will try it.

Just an follow-up in this thread, which fits my needs better: https://forums.unraid.net/topic/199012-not-possible-to-add-a-second-internal-boot-device-after-already-configuring-internal-boot/#findComment-1635923

Hey guys, i want to archive basically the same: I have boot and cache/appdata on 1x 1TB nvme with internal boot. My MB has one SATA port free and i have an spare 1TB SSD, which i want to add to the (boot cache/appdata) pool for redundancy, sure without data loss. First, i wanted to replace the nvme with 2x sata SSDs, but because my MB just have 4x SATA ports, i have abadoned this idea, Details are here: https://forums.unraid.net/topic/199489-internal-boot-change-device/#findComment-1635856 So the OP has a smaler drive he wanted to add it's a bit different than my goal. I have the same size ssd's (nvme & sata each ~1 TB with ~400 GB capacity used). @JorgeB Can you please confirm that my plan: shutdown Add new drive to unraid hardware boot stop array set slots on cache to 2 add new drive start array Does this work without data loss!? Thank you

Update: Checked my Mainboard (Gigabyte H610i) and realized it just has 4x SATA ports. 3x of them already in use by the array, so i will ditch my plan for now 😅 Sorry, for hijacking this thread.

@Soup @JorgeB Hijacking this thread, because i want todo a similar thing on my unraid server, but the other way arround. Hope this is ok, otherwise, just let me know and i move the content over there and link it here. Currently i am using 7.3.2 with an single nvme SSD, internal boot and cache on it, working flawless, since it was released. Now i have two SATA 1TB SSD's which i want to use in an raid 1 (for redundency of the internal/boot cache pool). My plan is: Use the mentioned USB method to boot unraid from USB: https://forums.unraid.net/topic/198440-73xx-version-moving-boot-drive-nvmessd-to-another-drive-nvmessd/#findComment-1619744 create new raid1 (boot!?) pool with the wizard (planning on using zfs for boot and xfs for cache) and migrate my boot to it and reboot remove the previous internal boot partition (is this possible, if yes how?), leave the cache as it is. stop array, docker & vm copy current /mnt/cache /mnt/cache_new (rsync with acl's...) assign the /mnt/cache_new to the shares (replacing /mnt/cache) start array, docker & vm ...and hope the best... 😀 Or is there another way for archiving my goal? I am a little bit scared to mess something up. Thanks a lot.

@BoKKeR Use bootimus instead.

@AdamBearWA and all here. Thanks a lot for all the infos. I also setup tailscale for my family, away from power forwarding. For emby it was as easy as changing the docker source to "lscr.io/linuxserver/emby:latest" (without quotes) and enabling Tailscale.

It seems the commit does not differentiate between hardware, but thats my assumption. Take it with a grain of salt.

Guys, finally unraid 7.3.0-rc1 fixed the performance issue on the i226-v. See here for details: https://forums.unraid.net/topic/182957-is-i226-v-nic-supported-by-unraid/#findComment-1589155 So i can recommend this card now for an low power (aspm enabled) unraid build. Without have to deal with plugins for realtek drivers 😀 Details incl. the commit see here: https://forums.unraid.net/topic/141349-plugin-realtek-r8125-r8126-r8168-and-r815267-drivers/page/18/#findComment-1620966

Guys, finally unraid 7.3.0-rc1 fixed the performance issue on the i226-v. So i can recommend this card now for an low power (aspm enabled) unraid build. Without have to deal with plugins for realtek drivers 😀 Details incl. the commit see here: https://forums.unraid.net/topic/141349-plugin-realtek-r8125-r8126-r8168-and-r815267-drivers/page/18/#findComment-1620966

Finally!!!!!!!!!!!!!!!!!!!!!!!!!!!! The i226-v driver bug i am reffering to in my last posts (performance loss when ASPM is on) is fixed in unraid 7.3.0-rc1 (kernel 6.18.23). Here is the commit which fixed the issue: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0325143b59c6c6d79987afc57d2456e7a20d13b7 Basically disabling aspm L1.2, preventing the performance issue with minimal higher power consumption. So with this commit i can recommend the Intel i226-v for low power unraid builds and have ASPM with no performance loss working. The c-states rabbit hole has become smaller for me 😁 Sorry for hijacking this realtek thread, but in the search if there is an working alternative google has guided me here. Hope this helps somebody to escape the c-states rabbit hole.