btrfs

  1. [SOLVED] BTRFS Filesystem in LXC/LXD Container

    Hi, on a fresh install of Proxmox with BTRFS, I noticed that the containers install by default with a loop device formatted as ext4, instead of using a BTRFS subvolume, even when the disk is configured using the BTRFS storage backend. I'd like to use BTRFS directly, instead of using a loop...
  2. EFI boot fails after block copy to new device

    Hello, I had a severe issue with OS disk (using BTRFS) and must replace it. This means I started block copy using dd from old disk to new SSD; I performed the following steps: 1. block copy with dd from old to new device 2. extend root partition 3. resize BTRFS of relevant partition Then I...
  3. vzdump of VM or CT slow when stored on local-btrfs

    Has anyone else seen or had issues with local-btrfs. I have tested with every setting I can find. When trying to backup a VM or container that is using local-btrfs. It is not usable. I am talking 8-128kib/s I have adjusted vzdump I have tried no compression. You name it. I move the VM or...
  4. Proxmox BTRFS - cannot change owner

    Hi, I am using BTRFS in all of my installations. I wanted to use it as filesystem for virtual disks for Proxmox (I am using 7.2-11). I was able to successfully create BTRFS storage (which seems to be more similar to Directory storage - means I need to mount it separately as it is not done by...
  5. [SOLVED] Expand BTRFS root in raid 1

    Hello Forum, I installed Proxmox and chose the option to use BTRFS in raid 1 configuration across 2 SSDs. This has worked perfectly fine, but recently disk space is becoming low. I only have space for 2 drives in the case, so I would like to expand/replace these 2 drives with larger ones. I'm...
  6. powersupport

    Is it possible to install proxmox backup server with btrfs

    HI, May I know if it is possible to install proxmox backup server with btrfs, if so, any documentation for the same? Thank you
  7. [SOLVED] BTRFS Technology Preview

    I see that BTRFS is in 7.2 and still listed as a technology preview. Is there an estimated VE version when this will be stable for production use?
  8. System did not find BTRFS root after removing one disk

    Hi, I have installed pve 7.1 with btrfs mirror using 2 SSD's. During installation these SSD's are /dev/sda and /dev/sdb. After base Installation I added 3 HDD's with an existing zfs. The device names of the SSD changed to /dev/sdd and /dev/sde. No problem so far. To check what is happening when...
  9. BTRFS - Slow Boot from "Welcome to Grub!"

    Hi All - I decided to give btrfs a try as my root FS on a single mSATA SSD. Everything seems fine aside from boot times - for some reason, GRUB hangs on the "welcome to Grub!" message for a solid 20 seconds. Grub's also seems slow to respond. Once the kernel is loaded and the initrd is...
  10. [RESOLVED]Proxmox with btrfs raid1 rootfs

    I simulate disk fail on the raid1 btrfs which is also my root for proxmox ve 7.1-7. When one of the disk failed, the system will not boot. It stuck at initramfs, i am unable to mount the system as the initramfs does not have mount.btrfs The system will boot normally with both disk exits...
  11. New Proxmox VE installation from scratch - Suggestions

    Hello, I'm going to install a new fresh Proxmox server for my homelab and I'd like to ask you suggestions to configure it in a proper way (I've already a Proxmox server I'd like to reconfigure from scratch). HW: CPU Intel Core i5 4460 (4c/4t) RAM 16GB 8x SATA3 ports (2 on the mobo and 4 on a...
  12. BTRFS in production

    Hello, what do you think about BTRF in a production server Raid 1 or Raid10 ? Some one use BTRFS RAID5 or RAID6 ? ( I'm reading that is not stable ..) Thanks!
  13. Undefined subroutine &PVE::Storage::DirPlugin::alloc_image at BTRFSPlugin.pm

    While working through the Cloud-Init at https://pve.proxmox.com/wiki/Cloud-Init_Support to create a Template on my PVE7 system that is using BTRFS storage I get the following error: $ sudo qm set 100 --scsihw virtio-scsi-pci --scsi0 local-btrfs:100/vm-100-disk-0.raw update VM 100: -scsi0...
  14. Disk cache settings for VMs on BTRFS

    I'm a little confused with the documentation. The BTRFS page says BTRFS will honor the O_DIRECT flag when opening files, meaning VMs should not use cache mode none, otherwise there will be checksum errors. which I understand to mean set the disk cache to anything other than none. However on...
  15. [SOLVED] QCOW2 using BTRFS file system, is good to use, without loss of performance?

    Hi, i would like to use QCOW2 image to my VMs, i am using BTRFS file system in PVE 7, but i found this https://forum.proxmox.com/threads/no-qcow2-on-zfs.37518/ post and there is a good question. Can I use it without loss of performance?
  16. How to deal with degraded btrfs-arrays?

    I am playing around with btrfs at the moment. What I haven't understood yet how to deal with degraded arrays: First I tried to install PBS in a VM, rootfs on ext4, so nothing special. Installed kernel 5.11 and btrfs-progs from backports. Made three disks and put them into a raid1-array with...
  17. Proxmox Home Media Server, file system and HDD setup

    Hello, I'm a bit lost on the optimal configuration for a Proxmox Homeserver running Jellyfin and other file and cloud services. I've an Asus C246M WU4 Mainboard with Xeon E2146 CPU. I use two NVMe SSDs in a mirrored setup with ZVS filesystem. I own one 8TB HDD for media storage which I plan...
  18. Proxmox NFS Backup/Remote Snapshots

    Hi there, I currently have some VMs which are hosted on and run from a shared NFS share by the Proxmox hosts. I currently use Proxmox to backup (snapshot) these VMs back to the NFS share but this seems inefficient with the reads from NFS -> PVE host and writes back from PVE -> NFS host...
  19. [SOLVED] Inconsistency Grub Menu vs. /boot/grub/grub.cfg

    Hello! I have a question regarding the content of Grub Menu vs. /boot/grub/grub.cfg. In my case the content is inconsistent. And this is causing an issue with booting a BTRFS snapshot, because the required snapshot won't boot with the options displayed in Grub Menu. I'm running these software...
  20. btrfs as a guest file system

    Dear all, I want to have urbackup VM and I want to use btrfs killer feature (cross link, offline dedup and so on) with urbackup. What do you think if I will have zfs (zvol) as my host fs and btrfs as a guest system? Best regards,

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