[PVE-User] RDX access to the guest...

[Dmitry Petuhov]

Seems like error in wiki. SG devices cannot be added as scsi. They're 
not even block devices. Maybe you need something like
scsi0: /dev/st0

or whatever real tape device is.


31.05.2016 13:34, Marco Gaiarin wrote:
> I'm setting up a test Proxmox installation (one host, local storage).
> Latest version.
>
> All tests seems to go well, guests boot and do what expected.
>
> Now we are trying to use an RDX backup system, hitting some trouble.
>
> I'm following:
>
> 	https://pve.proxmox.com/wiki/Tape_Drives
>
> because seems the most relevant wiki page (RDX, are, instead more an
> hard disk on cartdrige then a tape, but anyway... ;).
>
> I've tried the ''passthrought'' mode, eg:
>
> 	https://pve.proxmox.com/wiki/Tape_Drives#Using_Tape_Drives_as_SCSI_pass_through_.28for_Linux_KVM_guests.29
>
> but does not work, proxmox say:
>
>   Running as unit 100.scope.
>   kvm: -drive file=/dev/sg3,if=none,id=drive-scsi0,format=raw,cache=none,aio=native,detect-zeroes=on: file system may not support O_DIRECT
>   kvm: -drive file=/dev/sg3,if=none,id=drive-scsi0,format=raw,cache=none,aio=native,detect-zeroes=on: Could not open '/dev/sg3': Invalid argument
>   TASK ERROR: start failed: command '/usr/bin/systemd-run --scope --slice qemu --unit 100 -p 'KillMode=none' -p 'CPUShares=1000' /usr/bin/kvm -id 100 -chardev 'socket,id=qmp,path=/var/run/qemu-server/100.qmp,server,nowait' -mon 'chardev=qmp,mode=control' -pidfile /var/run/qemu-server/100.pid -daemonize -smbios 'type=1,uuid=f3bd2671-d16c-413c-835b-c8b8a8ac27f3' -name medoacus -smp '4,sockets=1,cores=4,maxcpus=4' -nodefaults -boot 'menu=on,strict=on,reboot-timeout=1000' -vga cirrus -vnc unix:/var/run/qemu-server/100.vnc,x509,password -cpu kvm64,+lahf_lm,+sep,+kvm_pv_unhalt,+kvm_pv_eoi,enforce -m 12288 -k it -device 'pci-bridge,id=pci.1,chassis_nr=1,bus=pci.0,addr=0x1e' -device 'pci-bridge,id=pci.2,chassis_nr=2,bus=pci.0,addr=0x1f' -device 'piix3-usb-uhci,id=uhci,bus=pci.0,addr=0x1.0x2' -device 'usb-tablet,id=tablet,bus=uhci.0,port=1' -device 'virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3' -iscsi 'initiator-name=iqn.1993-08.org.debian:01:b22ae61328f8' -drive 'file=/dev/cdrom,if=none,id=drive-ide2,media=cdrom,aio=threads' -device 'ide-cd,bus=ide.1,unit=0,drive=drive-ide2,id=ide2,bootindex=200' -device 'lsi,id=scsihw0,bus=pci.0,addr=0x5' -drive 'file=/dev/sg3,if=none,id=drive-scsi0,format=raw,cache=none,aio=native,detect-zeroes=on' -device 'scsi-block,bus=scsihw0.0,scsi-id=0,drive=drive-scsi0,id=scsi0' -drive 'file=/dev/pve/vm-100-disk-1,if=none,id=drive-virtio0,format=raw,cache=none,aio=native,detect-zeroes=on' -device 'virtio-blk-pci,drive=drive-virtio0,id=virtio0,bus=pci.0,addr=0xa,bootindex=101' -netdev 'type=tap,id=net0,ifname=tap100i0,script=/var/lib/qemu-server/pve-bridge,downscript=/var/lib/qemu-server/pve-bridgedown,vhost=on' -device 'virtio-net-pci,mac=32:38:30:38:32:36,netdev=net0,bus=pci.0,addr=0x12,id=net0,bootindex=300' -netdev 'type=tap,id=net1,ifname=tap100i1,script=/var/lib/qemu-server/pve-bridge,downscript=/var/lib/qemu-server/pve-bridgedown,vhost=on' -device 'virtio-net-pci,mac=66:38:62:35:36:32,netdev=net1,bus=pci.0,addr=0x13,id=net1,bootindex=301'' failed: exit code 1
>
> but /dev/sg3 exist and have the correct permission:
>
>   root at pvepd1:~# ls -la /dev/sg3
>   crw-rw---- 1 root disk 21, 3 May 31 12:17 /dev/sg3
>
> and is the correct device:
>
>   root at pvepd1:~# cat /sys/class/scsi_generic/sg3/device/model
>   RDX
>
>
> I'm forced to use iSCSI method? The setup is rather simple, so i hope no... ;(((
>
>
> Thanks.
>