Adding a Direct VolumeAdding a ShareCLI Storage-Management Guide 8-13Attaching a Virtual Directory to the Back-End ShareThe next step is to create a virtual attach-point directory, visible to clients from theroot of the volume, and attach it to a physical directory on the back-end filer. Forexample, you can create an attach point named /vol0 (in the /vol volume) and attach itto the filer’s /usr/local directory: the client-viewable /vol/vol0 is then the same as/usr/local on the filer. Clients can mount any level of the volume or attach-pointdirectory (/vol or /vol/vol0). Mounting below that level (for example, /vol/vol0/work)defeats the purpose of federating the attach points, so it is not supported.From gbl-ns-vol-shr mode, use the attach command to create an attach-point directoryand attach it to one of the filer’s physical directories:attach attach-point-directory [to physical-directory] [access-listlist-name]where:attach-point-directory (1-4096 characters) is the path of the virtual directorythat the client sees. This is relative to the root of the volume; for example, ifyou are in the /home volume and you enter a virtual directory of “aa,” clientssee this attach point as /home/aa.to physical-directory (optional; 1-1024 characters) specifies the name of theactual directory on the filer share. Similar to the attach-point directory, thispath is relative to the root of the filer share (established in the filercommand’s nfs or cifs clause, above). Use a “.” to attach to the root directoryin the share. If you omit this clause, the ARX uses the attach-point-directorypath.list-name (optional 1-64 characters) is the NFS access list to associate withthis attach point (see “Listing All NFS Access Lists” on page 4-10).You can use the command multiple times in the same direct share, thereby attachingto multiple directories on the back-end share. The maximum number of total attachpoints is resource- and platform-dependent: a later section describes various limits onresource usage, including attach points.Attach-point directories cannot be nested: if you create /var in one attach point, youcannot create /var/log in another attach point in the same volume.
