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Re: what happened to /dev/xvdd in my instance?


in 4.8, it's VDC that is "reserved" / missing

virsh dumpxml i-2-5748-VM | grep vd
      <target dev='vda' bus='virtio'/>
      <target dev='vdb' bus='virtio'/>
      <target dev='vdd' bus='virtio'/>
      <target dev='vde' bus='virtio'/>
      <target dev='vdf' bus='virtio'/>



On Thu, 6 Dec 2018 at 18:45, Andrija Panic <andrija.panic@xxxxxxxxx> wrote:

> That's a funny - and true observation - I also reproduced the same -
> during hotpluging disks, and also during booting instance with already
> attached disks - BUT inside VM, there are vda, vdb, vdc, vdd disks (no vde,
> as can be seen in VM XML)
>
> I though it might had something to do with ISO files, but these are (as it
> seems) always attached as IDE (sdc in my case/test).
>
> I'm still assuming this is done due to some reservations
>
> On Thu, 6 Dec 2018 at 18:25, Yiping Zhang <yzhang@xxxxxxxxxxx> wrote:
>
>> Hi, All:
>>
>> I am working on a script to handle data disks. So, I added a few data
>> disks to my instance. Then I noticed that in listVolumes api output, the
>> third data disk actually has a deviceid 4, instead of 3 as I would expect.
>> Sure enough, in the guest OS,  I see three data disks as /dev/xvdb,
>> /dev/xvdc, and /dev/xvde.  There is no device /dev/xvdd.
>>
>> Why does CloudStack skip device /dev/xvdd?  I have verified this behavior
>> on both ACS versions 4.9.3.0 and 4.11.2.0.
>>
>> Yiping
>>
>
>
> --
>
> Andrija Panić
>


-- 

Andrija Panić