System information

Protection and Recovery of Virtual Machines Attached to RDM Disk Devices
The protection and recovery of virtual machines that are attached to a raw disk mapping (RDM) disk device
is subject to different support depending on whether you use array-based replication or
vSphere Replication.
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Array-based replication supports RDM devices in physical compatibility mode and in virtual
compatibility mode. If you use Site Recovery Manager with array-based repliction, you can protect and
recover virtual machines that use RDM in either physical compatibility mode or virtual compatibility
mode.
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vSphere Replication supports RDM devices in virtual mode only, for both the source and target device.
If you use vSphere Replication, you cannot protect and recover virtual machines that use RDM in
physical compatibility mode.
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If you use both array-based repliction and vSphere Replication, you can only protect and recover
virtual machines that use RDM in physical compatibility mode by using array-based replication. You
can protect and recover virtual machines that use RDM in virtual compatibility mode by using either
array-based repliction or vSphere Replication.
Planned Migration of Virtual Machines on Datastores that Use SIOC
In previous releases of Site Recovery Manager you had to disable storage I/O control (SIOC) on datastores
that you included in a recovery plan before you ran a planned migration. This release of
Site Recovery Manager fully supports SIOC, so you do not have to disable SIOC before you run a planned
migration.
Disaster Recovery and Reprotect of Virtual Machines on Datastores that Use
SIOC
In previous releases of Site Recovery Manager, if you ran a disaster recovery with SIOC enabled, the
recovery would succeed with errors. After the recovery, you had to manually disable SIOC on the protected
site and run a planned migration recovery again. You could not run reprotect until you successfully ran a
planned migration. This release of Site Recovery Manager fully supports SIOC, so recovery succeeds
without errors and you can run planned migration and reprotect after a disaster recovery without disabling
SIOC.
Protection and Recovery of Virtual Machines with Components on Multiple
Arrays
Array-based replication in Site Recovery Manager depends on the concept of an array pair.
Site Recovery Manager defines groups of datastores that it recovers as units. As a consequence, limitations
apply to how you can store the components of virutal machines that you protect using array-based
replication.
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Site Recovery Manager does not support storing virtual machine components on multiple arrays on the
protected site that replicate to a single array on the recovery site.
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Site Recovery Manager does not support storing virtual machine components on multiple arrays on the
protected site that replicate to mulitple arrays on the recovery site, if the virtual machine components
span both arrrays.
If you replicate virtual machine components from multiple arrays to a single array or to a span of arrays on
the recovery site, the VMX configurations of the UUID of the datastores on the protected site do not match
the configurations on the recovery site.
Chapter 9 Interoperability of Site Recovery Manager with Other Software
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