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Hello! Why, friend? I literally asked fio run test on /dev/zvol/apool/vm-147-disk-x which is ZVOL itself, am i wrong? Yes, it is a file, but you know how they say - everything in Linux is a file :-) And no-no, i am assure you, i am not using LVM in this VM at all. I run fio directly on the...

I did, so this is results: 1) On the Host fio --name RWRITE --rw=randwrite --filename=/dev/zvol/apool/vm-147-disk-x --size=4g --direct=1 --blocksize=4k --iodepth=1 --numjobs=1 --ioengine=posixaio IOPS=27.2k, BW=106MiB/s 2) Inside VM with cache=unsafe fio --name RWRITE --rw=randwrite...

I am just trying figure out why VM much slower than actual hardware storage so whats why i turned sync=disable for ZVOL and cache=unsafe for VM. It is like "maximum effort" but it is temporary and only for one lab VM 72.5k of randwrite is somewhat similiar of TweakTown.com results for this...

Hello! Title says it all, but here a details: Host: Proxmox VE 6.3-6 Guest: Ubuntu Server 18.04.2 LTS SSD: ADATA XPG SX8200 Pro 2 TB (two in ZFS mirror) ZVOL: 90GB, thin-provised, sync=disabled Then i benchmarking this ZVOL directly on the Host i get almost maximum performance that this SSD...

So solution is simple: it is second USB Flash Drive :) Which will be good ol` MBR-type, ext4-filesystem and contain /boot directory. This way it will work. It is applies to USB HDDs well. And for PVE it is all the same. === So basically i follow this awesome guide...

Yeah... It seems combination of USB Flash Drive, GPT, Legacy BIOS, GRUB and ZFS just cant boot up. I guess there is some simple solution but i can`t figure it out. But i found a workaround! :cool: I will post it below

It is weird. So i installed PBS 1.0-1 on good ol` HP DL120 G7. I use SanDisk USB Stick as system drive because all four SATA drive bays in this server is occupied by hard drives. I choosed ZFS as root filesystem. Installation runs flawlessy. After installation server rebooted itself and i got...