I agree with Mr. Denny.  

When analyzing disk performance issues I would look into this counters. 

Avg. Disk sec/Read - is the average time, in seconds, of a read of data from the disk.

Avg. Disk sec/Write - is the average time, in seconds, of a write of data to the disk.

Ideally you would be looking less than 15ms latency but in reality I have seen it as high as 30ms in Tier II storage.  

Another counter is Avg. Disk Queue Length and you want see that number lower if possible.  

Performance Counters for SQL Server Related to iSCSI Disk Access
I am developing a mobile application for one of our client using Salesforce SDk. I haven't found any documentation regarding the community registration vai Salsforce SDK. Is this possible? 
Because when i complete the registration from "Not a member" link the page is still loading in the webview , not getting redirected to the application ( to mobile). Is there any way to accomplish registration via SDK?
