Explanation/Reference:
TPSTUN is a VAAI primitive that enables the array to notify vSphere when a LUN is running out of space due to thin provisioning over-commit. The command causes suspending all virtual machines on that LUN.
XtremIO supports this VAAI primitive.
Incorrect Answers:
C: The XtremIO features for VAAI support include:
Clone Blocks/Full Copy/XCOPY
Used for copying or migrating data within the same physical array (VMware term:
HardwareAcceleratedMove).
On XtremIO, this allows VM cloning to take place almost instantaneously, without affecting user I/O on active VMs.
D: The XtremIO features for VAAI support include: Zero Blocks/Write Same Used for zeroing-out disk regions (VMware term: HardwareAcceleratedInit).
This feature provides accelerated volume formatting.
References: https://itzikr.wordpress.com/2015/12/16/host-configuration-for-vmware-vsphere-on-emc- xtremio/