Thanks, the whole iSCSI LUN have been passed to the VM.
But I test it with scsicmd, and found that the driver may be not
support SPC-3, but if i use this by microsoft iscsi initiator, I can
pass all the scsi3_test tests.
Tool can be found here:
http://www.symantec.com/business/support/index?page=content&id=TECH72086
It's this means that the scsi passthrough windows driver does not
support SPC-3 feature, I have read a post about this, it says if
support this we should change both the implementation and the
documents in virtio spec.
I am new to this list, so I don't know what is the situation right now?
Would somebody please give me some advise on it?
On Tue, Aug 20, 2013 at 6:49 PM, Paolo Bonzini <pbonzini(a)redhat.com> wrote:
Il 20/08/2013 12:42, Timon Wang ha scritto:
> [root@localhost /]# ls -l /dev/VM-IMAGES-BACKUP-DO-NOT-REMOVE/q_disk
> lrwxrwxrwx. 1 root root 8 8月 20 17:38
> /dev/VM-IMAGES-BACKUP-DO-NOT-REMOVE/q_disk -> ../dm-13
> [root@localhost /]# sg_inq /dev/VM-IMAGES-BACKUP-DO-NOT-REMOVE/q_disk
> standard INQUIRY:
> PQual=0 Device_type=0 RMB=0 version=0x05 [SPC-3]
> [AERC=0] [TrmTsk=0] NormACA=0 HiSUP=0 Resp_data_format=0
> SCCS=1 ACC=0 TPGS=1 3PC=0 Protect=0 [BQue=0]
> EncServ=0 MultiP=0 [MChngr=0] [ACKREQQ=0] Addr16=0
> [RelAdr=0] WBus16=1 Sync=1 Linked=0 [TranDis=0] CmdQue=1
> length=36 (0x24) Peripheral device type: disk
> Vendor identification: MacroSAN
> Product identification: LU
> Product revision level: 1.0
> Unit serial number: 0d9281ae-aea4-6da0-0000-02180142b300
>
> This lun is from a vg build based on iscsi target.
If it is a logical volume, you cannot pass it as a LUN to the guest.
Only the whole iSCSI LUN can be passed as a LUN.
Paolo
> [root@localhost /]# libvirtd --version
> libvirtd (libvirt) 1.0.5
> [root@localhost /]# qemu-kvm --version
> QEMU emulator version 1.4.1, Copyright (c) 2003-2008 Fabrice Bellard
> [root@localhost /]# uname -a
> Linux localhost.localdomain 3.9.2-301.fc19.x86_64 #1 SMP Mon May 13
> 12:36:24 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
>
>
> On Tue, Aug 20, 2013 at 6:16 PM, Paolo Bonzini <pbonzini(a)redhat.com> wrote:
>> Il 20/08/2013 11:59, Timon Wang ha scritto:
>>> On Tue, Aug 20, 2013 at 4:33 PM, Paolo Bonzini <pbonzini(a)redhat.com>
wrote:
>>>> Il 20/08/2013 08:00, Timon Wang ha scritto:
>>>>> <disk type='file' device='disk'>
>>>>> <driver name='qemu' type='raw'
cache='none'/>
>>>>> <source file='/home/images/win2008_2_sys'/>
>>>>> <target dev='hda' bus='ide'/>
>>>>> <boot order='3'/>
>>>>> <address type='drive' controller='0'
bus='0' target='0' unit='0'/>
>>>>> </disk>
>>>>> <disk type='file' device='cdrom'>
>>>>> <driver name='qemu' type='raw'/>
>>>>> <source file='/home/isos/windows2008_64r2.iso'/>
>>>>> <target dev='sdc' bus='ide'/>
>>>>> <readonly/>
>>>>> <boot order='1'/>
>>>>> <address type='drive' controller='0'
bus='1' target='0' unit='0'/>
>>>>> </disk>
>>>>> <disk type='block' device='disk'>
>>>>
>>>> I'm not sure this will be enough, but if you want passthrough to the
>>>> host device you should use device='lun' here. However, you still
would
>>>> not be able to issue SCSI reservations unless you run QEMU with the
>>>> CAP_SYS_RAWIO capability (using "<disk ...
rawio='yes'>").
>>>>
>>>
>>> After change the libvirt xml like this:
>>> <disk type='block' device='lun' rawio='yes'>
>>> <driver name='qemu' type='raw'
cache='none'/>
>>> <source
dev='/dev/VM-IMAGES-BACKUP-DO-NOT-REMOVE/q_disk'/>
>>> <target dev='sda' bus='scsi'/>
>>> <shareable/>
>>> <address type='drive' controller='0' bus='0'
target='0' unit='0'/>
>>> </disk>
>>> I got these errors:
>>> char device redirected to /dev/pts/1 (label charserial0)
>>> qemu-system-x86_64: -device
>>>
scsi-block,bus=scsi0.0,channel=0,scsi-id=0,lun=0,drive=drive-scsi0-0-0-0,id=scsi0-0-0-0:
>>> scsi-block: INQUIRY failed
>>> qemu-system-x86_64: -device
>>>
scsi-block,bus=scsi0.0,channel=0,scsi-id=0,lun=0,drive=drive-scsi0-0-0-0,id=scsi0-0-0-0:
>>> Device 'scsi-block' could not be initialized
>>
>> Can you do
>>
>> # ls -l /dev/VM-IMAGES-BACKUP-DO-NOT-REMOVE/q_disk
>> # sg_inq /dev/VM-IMAGES-BACKUP-DO-NOT-REMOVE/q_disk
>>
>> ?
>>
>> Paolo
>>
>
>
>
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