HP EVA 4400 not mapping drive on windows

[m.farrukh]

I have EVA 4400 & 4100. when i present a drive to windows 2003 server from EVA 4400.i have to go to device manger then disk mangment and have to rescan disk.then the disk appears in MY Computer.i have to do same when i unpresent the disk...but on the same server when i present the drive from EVA 4100 the drives automaticaly appears in my computer with out rescaning.is there any option in windows which i have to enable.