Hi Vivek,

Can you detach one of the data drive and try to power-on the VM, check if
it works for you in starting of VM. If so, re-attach the detached drive to
VM in online.

P.S.: I sometimes seeing this type of issue when the VM got up with more
than 4 drive which includes ROOT disk.


Thanks.
Anil.

On Sat, Oct 28, 2017 at 6:36 PM, Rafael Weingärtner <
raf...@autonomiccs.com.br> wrote:

> Did you check the hierarchy of these files with 50KB?
>
> I believe that when ACS takes a snapshots it will create a hierarchy of
> VHDs, and since you are looking for the leaf right after the snapshot, it
> is for sure empty (or almost empty)
>
>
> On 10/28/2017 9:24 AM, Vivek Kumar wrote:
>
>> Hello Team,
>>
>> I am using cloudstack 4.7.1 with xenserver 6.5, Recently I come up with a
>> strange issue. I had a VM with four data disk  so we planned to scale it
>> up, I shutdown my VM and changed the service offering and  before doing
>> that we had taken snapshot, after all this I just turned on my VM and it
>> gave me error that VMs cant be up due to insufficient capacity. So I have
>> checked the logs but couldn't get any clue. I see the path of these volumes
>> from my DB and checked it in my storage and I found all these VHD are
>> having no data earlier it used to be like 100GB, 25GB  and like this , but
>> now size of disks are around 50KB for all VHDs.
>>
>> So how come it deleted all old VHDs and replaced it with new VHd, I
>> checked on my xenserver about these VHDs so that I can map the correct VHD
>> in cloud stack.  We found the relevant VHDs and copied it to another
>> location so that we can revcover data in case of any issue.
>>
>> After some time I noticed that it deleted all old VHDs as well - I Dont
>> understand why it got deleted even if I manually create VHD it is also
>> getting deleted. So we tried it import all VHDs in a xenserver and found no
>> data inside these VHDs.
>>
>> We were using LVM with all these four disk, basically I mounted 3 data
>> disk and create a volume group and then merged it into a root file system.
>> I agree that its not a good practice because data disk should not depend on
>> OS disk.
>>
>> Can someone please help me to figure out the reason behind it.
>>
>> Vivek Kumar
>>
>>
>>
>>
> --
> Rafael Weingärtner
>
>

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