I've seen RPC errors on SnapDrive before with a customer.  Does the LUN get created on the filer and then not mounted on the server? 
 
In this case, it turned out to be this bug:
 
http://now.netapp.com/NOW/cgi-bin/bol?Type=Detail&Display=103404
 
Sorting the name resolution fixed it.
 
Cheers
Chris

 

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From: owner-toasters@mathworks.com on behalf of Bluezman
Sent: Fri 25/04/2008 17:52
To: Milazzo Giacomo
Cc: toasters@mathworks.com
Subject: Re: R: Snapdrive alternative

Milazzo Giacomo wrote:
> Not very stable?
> I suggest you to review your environment for we've lot of W2K3 systems and heavy apps (SPS, E2K3, E2K7, SQL fm 2K to 2K5...) using Snapdrive (fm 4.x to 5.x) and SManager since months with no issues at all...(fiber and iSCSI)
>
>
>  
all our servers are vanila installs (new setups)
win 2k3 64 bit fully patched,
mpio from MS is installed
iscsi from MS is installed
snapdrive 5.0 is installed
hosts are tied into AD.
local user on host is snapdrive, also created a user on the filer
"snapdrive", added user to Administrators group.
snapdrive runs as the local user "snapdrive"
created volumes, shared them to everybody via cifs
when i go to snapdrive on the host side, i keep getting RPC errors,
however i can see the volumes, and can create luns, but can not mount
the luns.

to summarize

do i actually need snapdrive to mount luns ? or can this be done, via
windows drive mapping ?
if via drive mapping, how would i expand a volume ?