Are any of the the below errors a concern?
Those two are not real errors, just normal kernel log to notice that the disk seems to have no cache, and thus write-through mode is selected to ensure writes get written directly through to the disk.Specifically the ones that mention 'no caching mode page found'?
no caching mode page found
assuming drive cache: write through
Proxmox VE in version 6? And when you say RAID1, do you mean with our installer on a ZFS RAID1, or a HW RAID1?
Hmm, IMO the ACPI ones are looking a bit suspicious. What CPU/Mainboard is used here? Maybe check the BIOS/UEFI settings for some power savement options, or the like (just a guess).
Those two are not real errors, just normal kernel log to notice that the disk seems to have no cache, and thus write-through mode is selected to ensure writes get written directly through to the disk.
What disks do you use?
Both drives are SATA. My intention is to configure the 3 servers with clustering+ceph. Will this configuration need to change? write through will work correctly for this installation?
Ah, OK, now I got it, your the one from: https://forum.proxmox.com/threads/correct-initial-installation-w-ceph.57463/#post-265670
Then I mention the same as in my other reply: I somehow (no idea how) missed the Ceph part you mentioned in the other thread and just focused on your posted screenshot with ZFS. Yes, I'd scrape the thing a re-setup it without ZFS. As said in the other thread: a small SSD for the PVE itself could do wodner, you'd free up a full disk for ceph (ceph likes to manage OSD Disks completely on their own best). Here 128GB would be even enough, and 256 to 512 GB drives (SATA or M.2) cost about 60 to 80 €, so IMO well worth the investment.
I should select ext4 on the SSD, and then configure the other drives during the CEPH configuration?
Wouldn't the SSD have an OSD as well?
Yes, exactly. You can create OSDs after installation and initial ceph setup easily through the Webinterface.
Sorry, how do you mean that? yes, in theory you could add a OSD on parts of that SSD, but I really would not do that.
1. 256GB is rather small for an OSD, especially if parts of that need to be used for hosting Proxmox VE itself
2. It'd place the VM data and the PVE operating system on the same disk, slows things down and adds tight coupling.