Hello,

There are many possibilities that come to mind.  Are you using quick format?  Perhaps try to format from the server console.  Is it possible you are trying to format a LUNZ?  Do you have PowerPath on the server?  Does the lun you are attempting to format show in PowerPath?

These are just a few things to consider.  Perhaps a service request with EMC is needed to review the EMCReports. 

using PowerPath or MPIO ? Latest HBA drives/Microsoft patches ?

I suggest getting a service request open so support can review the EMCReports and SP collects. 

Failover mode is set to 4

Same result for all luns

I was already working with single path and I tried removing MPIO as well, rebooted host and tried again and got the same result ☹

Are you using a failover mode of 4 on the VNX?

Do you have the same result for all luns or just one?

Do you have the same result if you reduce to a single path and remove MPIO?

Using MPIO and as per EMC Reports HBA’s and patches are fine

Using quick format from Window’s GUI, Native MPIO is in use and I was trying to format the correct lun

Ankush, May i ask what is the HBA vendor and what is the driver version installed?

HBA Vendor : Emulex

Driver Version : 7-2.10.211

Firmware version : 2.80*7

BIOS version : 2.02a1

Thanks

Ankush

Thanks Salem for your inputs.

I will check and confirm.

Thanks

Ankush