Proxmox 3.4 and RAID0

[brblos]

Hello,
I installed version 3.4 and I used RAID 1 configuration. When I want to create a VM so Proxmox write error:
//edit: Sorry, RAID1

kvm: -drive file=/var/lib/vz/images/100/vm-100-disk-1.qcow2,if=none,id=drive-virtio0,format=qcow2,aio=native,cache=none,detect-zeroes=on: file system may not support O_DIRECT
kvm: -drive file=/var/lib/vz/images/100/vm-100-disk-1.qcow2,if=none,id=drive-virtio0,format=qcow2,aio=native,cache=none,detect-zeroes=on: could not open disk image /var/lib/vz/images/100/vm-100-disk-1.qcow2: Could not open '/var/lib/vz/images/100/vm-100-disk-1.qcow2': Invalid argument
TASK ERROR: start failed: command '/usr/bin/kvm -id 100 -chardev 'socket,id=qmp,path=/var/run/qemu-server/100.qmp,server,nowait' -mon 'chardev=qmp,mode=control' -vnc unix:/var/run/qemu-server/100.vnc,x509,password -pidfile /var/run/qemu-server/100.pid -daemonize -smbios 'type=1,uuid=e46dabe8-5966-4f28-a55c-09226920a721' -name xp -smp '2,sockets=1,cores=2,maxcpus=2' -nodefaults -boot 'menu=on,strict=on,reboot-timeout=1000' -vga qxl -cpu kvm64,+lahf_lm,+x2apic,+sep -m 2048 -k en-us -device 'piix3-usb-uhci,id=uhci,bus=pci.0,addr=0x1.0x2' -spice 'tls-port=61000,addr=127.0.0.1,tls-ciphers=DES-CBC3-SHA,seamless-migration=on' -device 'virtio-serial,id=spice,bus=pci.0,addr=0x9' -chardev 'spicevmc,id=vdagent,name=vdagent' -device 'virtserialport,chardev=vdagent,name=com.redhat.spice.0' -device 'virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3' -iscsi 'initiator-name=iqn.1993-08.org.debian:01:f861a656cbfe' -drive 'file=/var/lib/vz/template/iso/Win_XP.iso,if=none,id=drive-ide2,media=cdrom,aio=native' -device 'ide-cd,bus=ide.1,unit=0,drive=drive-ide2,id=ide2,bootindex=200' -drive 'file=/var/lib/vz/images/100/vm-100-disk-1.qcow2,if=none,id=drive-virtio0,format=qcow2,aio=native,cache=none,detect-zeroes=on' -device 'virtio-blk-pci,drive=drive-virtio0,id=virtio0,bus=pci.0,addr=0xa' -netdev 'type=tap,id=net0,ifname=tap100i0,script=/var/lib/qemu-server/pve-bridge,downscript=/var/lib/qemu-server/pve-bridgedown' -device 'e1000,mac=D6:BC:14:52:993,netdev=net0,bus=pci.0,addr=0x12,id=net0,bootindex=300' -rtc 'driftfix=slew,base=localtime'' failed: exit code 1

Thanks

 

[tom]

use cache=writeback or cache=writethrough (for your virtual disks)

 

[dietmar]

Or use the new zfs storage plugin (define and use a zfs storage).

 

[brblos]

which is better in terms of performance?

 

[dietmar]

which is better in terms of performance?

The zfs storage plugin.

 

[brblos]

Sorry for my beginner questions
When installing Proxmox I chose ZFS (RAID1). Or do I have to download the plugin and then create ZFS disk for VM?
Thanks.

 

[brblos]

ok, I found it. Now I have added another hdd (now I have 3 pieces) and use ZFS1. Proxmox need 8 GB RAM?

 

[chrone]

The zfs storage plugin.

As in local storage we could manage the image from /var/lib/vz/images. How to access the vm image file if we're using zfs block-storage? Thanks./chrone

 

[BobDschingis]

ok, I found it. Now I have added another hdd (now I have 3 pieces) and use ZFS1. Proxmox need 8 GB RAM?

thanks for sharing your knowledge
for all who look for the solution.
It is described here: https://pve.proxmox.com/wiki/Storage:_ZFS#Adding_a_ZFS_storage_via_GUI

On this new storage you can only store disks.
If you want to store more than disk (images, dumps), you have to also add the pool as a directory.