Presentation management is what you are looking for.
On the HP Virtual Arrays it's licensed per terabyte of disk ($10k / Year if I recall) and called Secure Path (not to be mistake with Secure Path Manager).
On the HP EVA arrays, there's a little button that says, "Present".
You are probably seeing the LUNs because your storage team has determined to use Port Zoning instead of WWN (world wide name) zoning on their switches. It's technically more secure as you can spoof a WWN, but you can't spoof a physical port. It's also easier to manage.
On the other hand, it means that your host sees the array, all of it.
In our case, we have Compaq EMAs, (with presentation management), HP EVAs (with pres. mgmt.) and our VAs.. without, because it's just too expensive. So, you have to find ways around it.
Ways around it.
If the array is Active/Passive, as opposed to Active/Active. Secure Path Manager will mask all of the additional paths. However, be careful; when you install it, it will change all of your disk paths the first time, so vgexport to a map file, and re-import later.
Map your LUNs. For our VAs, we keep a spreadsheet, a map of which LUNs point to which hardware path. There is a defined hardware path (after the FC adapter) that you can find in an ioscan.
Two useful references for understanding this are:
http://www.hp.com/hpbooks/prentice/chapters/0130102229.pdfThe other link is broken, I'll attach it.
Also of note, if it's a new LUN, on an ioscan, the newest LUN will have the highest instance number (column I), look for your two (for single HBA on your host) or four (for dual HBAs on your host)
Good luck,
Don
