Administrator Guide

● Hyper-V guests (VMs) can use only single path I/O. Multipath cannot be installed. These VMs must be gen 2. Gen 1 is not
supported.
● Dell has opened a ticket with Microsoft to address this situation.
Creating Backup Sets in a Hyper-V Cluster
Virtual machines may be moved among cluster nodes for a variety of reasons. Virtual machines may be moved manually, for
example, in preparation for planned server maintenance. Virtual machines may also be moved dynamically, for example, when the
Dynamic Optimization feature is enabled in Virtual Machine Manager. During Dynamic Optimization, the resources of each node
in a cluster are monitored to optimize the placement of virtual machines initially and during failover.
In an environment where virtual machines move often within a cluster, and where collections of virtual machines do not
consistently move together, each Replay Manager backup set should contain only one virtual machine per CSV. This avoids the
need to frequently re-create backup sets to account for the movement of individual virtual machines.
Support of Recovery with Pass-Through Disks
As Microsoft supports the virtualization of applications like SQL Server and Exchange, more administrators are virtualizing their
application environments and using pass-through disks for data volumes. If there are pass-through disks attached to a virtual
machine, Replay Manager can be installed on the virtual server guest to back up the data volumes for the application. Because
of the abstraction layer that is introduced in virtualizing the hardware, the only way to recover a snapshot directly back to the
virtual machine is by using the Microsoft iSCSI Software Initiator which is available as a free download from Microsoft (for
Microsoft Vista and Microsoft Server 2008 (and later), the iSCSI Software Initiator is included with the operating system). iSCSI
uses Ethernet connectivity which is readily accessible by a virtual machine and is easy to configure both on the server as well as
the storage.
VSS Error Event ID 8194
When backing up Hyper-V virtual machines, the following error may be logged in the Windows Event Log:
Event ID 8194
Volume Shadow Copy Service error: Unexpected error querying for the
IVssWriterCallback interface. hr = 0×80070005, Access is denied.
This error does not prevent backup jobs from completing successfully and it can be safely ignored.
Additional Information on Using Replay Manager with Hyper-V
For further information on how Hyper-V integrates with Replay Manager, see the Dell Storage Center Replay Manager 7 and
Microsoft Hyper-V Best Practices Guide.
See the following link (login required) : http://en.community.dell.com/techcenter/extras/m/white_papers/20437951
Microsoft SQL Server
Replay Manager supports backing up and restoring data for Microsoft SQL Server 2019, Microsoft SQL Server 2017, Microsoft
SQL Server 2016, Microsoft SQL Server 2014, and Microsoft SQL Server 2012.
General Guidelines for Microsoft SQL Server
For all versions of Microsoft SQL Server, follow these general guidelines for backing up and restoring data.
● Use the Replay Manager SQL Databases backup extension—do not use the Local Volumes backup extension
The Local Volumes Extension allows an administrator to select entire volumes when defining a backup set. Each database
stored on the selected volumes wait for the current process to finish before temporarily halting further operations, if
all volumes used by the database are included in the backup set. However, you should use the SQL Databases backup
60
Replay Manager Best Practices