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From Sanjeev Neelarapu <>
Subject RE: Unable to attach second disk on CentOS 7 VM
Date Wed, 13 Apr 2016 13:44:08 GMT
Xen-tools include the required PV drivers and we don't have to download anything for this.
Try attach ISO option on a vm from CS UI and you will see xen-tools iso in the drop down list.

Best Regards,
Sanjeev N
Chief Product Engineer, Accelerite
Off: +91 40 6722 9368 | EMail: 

-----Original Message-----
From: Stavros Konstantaras [] 
Sent: Wednesday, April 13, 2016 7:00 PM
Subject: Re: Unable to attach second disk on CentOS 7 VM

Thanks for the idea. Do the xen-tools include the required PV drivers? 

I know that there is no official rpm of xen-tools so I need to download them and install them
manually, correct?


> On 13 Apr 2016, at 15:22, Erik Weber <> wrote:
> Install xentools.
> I have no idea what centos-release-xen is, but apparently it is not 
> enough for your hypervisors
> --
> Erik
> On Wed, Apr 13, 2016 at 3:20 PM, Stavros Konstantaras 
> <
>> wrote:
>> Hi all ACS members.
>> Did anyone face in the past any issue while attaching a second volume 
>> on a
>> CentOS7 VM? I receive the following message:
>> "Failed to attach volume testVolume5 to VM CentOS7VM; Failed to 
>> attach volume for uuid: aa763fd8-02dc-42a1-bfe1-4e44201e487f due to 
>> You attempted an operation on a VM which requires PV drivers to be 
>> installed but the drivers were not detected.”
>> I tried the following solution:
>> - yum install centos-release-xen
>> - yum update
>> - reboot
>> But again it didn’t work (essentially, booting with 3.18 kernel 
>> instead of 3.10). Any ideas? Our CS version is 4.6 together with 
>> XenServer 6.5 With CentOS 6.7 everything works fine.
>> Kind Regards
>> Stavros
>> ----------------------------
>> Stavros Konstantaras
>> Science faculty Research IT support (FEIOG) University of Amsterdam, 
>> Science Park 904, 1098 XH
>> Fingerprint: E5E5 9B19 D1CD 88CD 4763  3465 A8DC 7C92 330F D59A

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