[libvirt-users] Oracle RAC in libvirt+KVM environment

[Timon Wang]

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 at redhat.com> wrote:
> Il 20/08/2013 12:42, Timon Wang ha scritto:
>> [root at 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 at 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 at localhost /]# libvirtd --version
>> libvirtd (libvirt) 1.0.5
>> [root at localhost /]# qemu-kvm --version
>> QEMU emulator version 1.4.1, Copyright (c) 2003-2008 Fabrice Bellard
>> [root at 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 at 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 at 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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