cannot make snapshots

Bug #1170392 reported by davidpenta
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
xen-api (Ubuntu)
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Undecided
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Bug Description

1)Description: Ubuntu 12.04.2 LTS
Release: 12.04

I have xcp-xapi running , but I can't make live snapshots( snapshoting works when the VM is off). When I try to make a live snapshot I get the following error :

Error code: SR_BACKEND_FAILURE_82
Error parameters: , Failed to snapshot VDI [opterr=failed to pause VDI 5789e9a8-3c2e-4e50-ad3d-5bd59df6390f]

my kernel is :
Linux folsom 3.5.0-23-generic #35~precise1-Ubuntu SMP Fri Jan 25 17:13:26 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

I upgraded the blktap driver from version 2.0.91 to version 2.0.93

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