Can be helpful for debugging

Add volume serial number to /proc/fs/cifs/DebugData info on each share e.g.:

    Shares:
    0) IPC: \\localhost\IPC$ Mounts: 1 DevInfo: 0x0 Attributes: 0x0
    PathComponentMax: 0 Status: 1 type: 0 Serial Number: 0x0
    Share Capabilities: None    Share Flags: 0x0
    tid: 0xf13518ce    Maximal Access: 0x1f00a9

    1) \\localhost\scratch Mounts: 1 DevInfo: 0x20 Attributes: 0x1006f
    PathComponentMax: 255 Status: 1 type: DISK Serial Number: 0xd50e5aa0
    Share Capabilities: None Aligned, Partition Aligned,    Share Flags: 0x0
    tid: 0xb792fd24    Optimal sector size: 0x200    Maximal Access: 0x1f01ff


-- 
Thanks,

Steve