Hi shaikh I'll try to answer all of your questions because there is more than one angle to it 1. In order to enable VAAI, you need to configure your esx servers to support alua, this is done from unispere failover wizard which needs to be set to failover mode=4, this does require a reboot. 2. In order to enable rr when using iSCSI it is not enough to just select rr from the path policy screen, please follow the following instructions - [URL] 3. What's the MTU size of your infra / it needs to be 1500 end to end (host,switch etc') 4. Lastly, it's important to remember that VAAI isn't neccesarly quicker but rather more efficient - the store does the copy heavy lifting and not the host..  Let us know how it goes  Itzik Reich vSpecialist Technical, EMEA South   ב-Sep 12, 2011, בשעה 12:46 AM, "Shaikh" > כתב/ה:  EMC Community Network  VNX 5500 with iSCSI Setup Very Slow Storage vMotion created by Shaikh in Everything VMware At EMC - View the full discussion
Hi   Trying to find root cause of slow performance when Storage vMotion tasks. This tasks can take anything from 30 to 40 mins moving 5 GB file. We have vSphere 4.1 and ESXi 4.1 Update 1 installed with DataMover.HardwareAcceleratedMove enabled by default. When storage is presented to ESXi host its selects nmp as VMW_SATP_CX with VMW_PSP_FIXED?  Is the ESXi host selecting right nmp? or can VNX 5500 support round robin? If so I am assuming the nmp will be VMW_SATP_ALUA_CX? On ESXi host we are using HP NC550 network card without iSCSI offloading. Cisco N5K switch is used for networking.  Any help would be greatly appreciated   Kind regards, Shaikh
VNX 5500 with iSCSI Setup Very Slow Storage vMotion