It seems like in 10.0 I could look under Service Properties in Server Manager and get the name and path for the source mxd that the service is referencing. I can't find this information in the server manager for 10.1. Am I missing it somewhere or is it gone? Personally I found it pretty useful.
Although the pathname is no longer stored in the Server Manager in a browser, it is possible to access the original document name through your administrative connection in Catalog.
If you published your Map Service from a saved MXD, you can right click on the service from within the catalog window, select service properties and navigate to the Parameters tab. There is a section called original document which will indicate the original document path if one was avaialble at the time of publishing.
I was just loooking into this last week too. As far as I can tell, you can only get to the path where server creates the msd when you publish the service, which is appears to be <directories folder>\arcgissystem\arcgisinput\<Service Name>.MapServer\extracted\v101\<Service Name>.msd.
We've decided to use a standard naming convention - the MXD should be named whatever the service is named & the MXD should be on a shared location where everyone can access it. We're also looking at putting the path to the MXD in the Service's ItemInfo via the Admin API - e.g. http://<server>/arcgis/admin/services/<Service>.MapServer/iteminfo/edit
Would be nice if it was just stored for us as it was in 10.0 though...
Although the pathname is no longer stored in the Server Manager in a browser, it is possible to access the original document name through your administrative connection in Catalog.
If you published your Map Service from a saved MXD, you can right click on the service from within the catalog window, select service properties and navigate to the Parameters tab. There is a section called original document which will indicate the original document path if one was avaialble at the time of publishing.