Computer Laboratory

Information for Windows users

Access to the file server

Files are held on a central fileserver. This can be accessed either via Windows using CIFS or from Unix using NFS. These two access methods can be used to manipulate the same files. Doing this may result in confusion because of inherent differences in the protection that can be set on the files under the two systems. However, it shouldn't be possible to do any harm, and the filer should enforce the access controls conservatively.

For a more general overview of the File server and the rest of the file system see here.

Windows file space

The windows file space is mapped to a drive at login for most domain users. If not then it can be mounted using the path \\filer\{CRSID}. When this directory was created for you it was set using CIFS style permissions with full access granted only to the user it belongs to and Domain Administrators. If you wish others to access your files then do this under Windows using the secuity tab on the folder properties sheet.

If you view the permissions on Windows files under NFS access then you will see a world permission set for each right that is granted to one or more other users, for windows files the bit is essentially an existential rather than universal quantifier - your files are not world readable even though this is how they appear.

Unix file space (via Windows)

Each user is given access to the Unix home directory directly via the NetApp server. To access the files just map the network drive \\filer\userfiles\{CRSID}\unix_home to a drive on your machine (where CRSID is your unix login). You should be careful of changing permissions on any files in your Unix space as this will result in their having an ACL attached and the permissions when viewed form the Unix world will appear to be wrong. In particular take care never to remove yourself from the ACL of a file you wish to access under Unix.

It is strongly recommended that you only manipulate files in subdirectories of unix_home via Windows machines and preferably only for reading. Do not modify unix_home or you may block mail delivery.

Using the filer from Windows

The best way to access your filespaces is to create shortcuts in My Network Places. To do this you should click on My Network Places in the Start menu. This will bring up a window such as:-

then click on the Add Network place task which will start the wizard, click next to advance to the following dialog (this may take a while as the system searches for places to add)

double click on the highlighted option above and you will be prompted for an address

then click Next and choose a suitable name for this location

then click Next again followed by Finish. You can then quickly open these locations again from the My Network Places folder and they are also easily reached via the File chooser inside applications.

Manipulating permissions

There is a tool which can be installed which allows you to see the permission model that is actually in use on a file or folder and to manipulate it. That utilitiy is called SSACCESS and can be installed either via the SMS Advertised Programs control panel applet or directly from the \\filer\install\LocalInstall\NetServerUtils share.

Screen shot of ssaccess tool