Which two VMware features will not allow an adapter to transition from Cisco VM-FEX standard
mode to universal passthrough mode? (Choose two.)
A.
VM Snapshot
B.
Volume Shadow Copy
C.
Storage vMotion
D.
HA
E.
Resource Reservations
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With VMware, high-performance mode also supports vMotion. During vMotion, the hypervisor reconfigures links in high-performance mode to be in standard mode, transitions the link to the new hypervisor, and then reconfigures the link to be in high-performance mode. The following figure shows how VM-FEX operates in high-performance mode with vMotion.
http://www.cisco.com/en/US/docs/unified_computing/ucs/sw/vm_fex/vmware/gui/config_guide/2.1/b_GUI_VMware_VM-FEX_UCSM_Configuration_Guide_2_1_chapter_01.html#concept_6576F5D171814916B16BEDFDE2C3A698
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DirectPath I/O allows virtual machine access to physical PCI functions on platforms with an I/O Memory Management Unit.
The following features are unavailable for virtual machines configured with DirectPath:
■
Hot adding and removing of virtual devices
■
Suspend and resume
■
Record and replay
■
Fault tolerance
■
High availability
■
DRS (limited availability. The virtual machine can be part of a cluster, but cannot migrate across hosts)
■
Snapshots
Cisco Unified Computing Systems (UCS) through Cisco Virtual Machine Fabric Extender (VM-FEX) distributed switches support the following features for migration and resource management of virtual machines which use DirectPath I/O:
■
vMotion
■
Hot adding and removing of virtual devices
■
Suspend and resume
■
High availability
■
DRS
■
Snapshots
http://www.aiotestking.com/cisco/which-two-vmware-features-will-not-allow-an-adapter-to-transition-from-cisco-vm-fex-standard-mode-to-universal-passthrough-mode/
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from the comment above I would say B + E
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