Conference ssag::ask_ssag

6536.0. "TLZxx drops out of compress mode" by ALFSS2::ZURIK_E () Tue Apr 01 1997 15:59

    This problem shows up using Networker Save and restore. Also posted
    in Networker notes conference note 477.
    
    I know of 3 customers with TLZ06/TLZ6L/TLZ07 that have complained
    about their tape drives not doing compression or dropping out
    of compressed mode. I have also observed it on my TLZ6L.
    The stackers have a DC indicator which comes when the drive is
    writing in compressed mode. I can label a tape, the DC indicator
    comes on but goes off after a few days. I have never seen it stay
    on for the entire tape. To get compression back on, I mark the tape
    in the drive as read-only, and then relabel the tape in the next slot
    and mount it.
    
    One customer has a TLZ07 and he claims compression has not worked
    since upgrading UNIX from v3.2d to 4.0b. He cannot get more than
    4GB on a tape. There is no DC indicator on the TLZ07 so I don't
    know if compression is ever turned on.
    
    All drives in question are behind in firmware so I will have them
    upgrade the fw first.
    
    The TLZ07 with the problem is fw rev 5530, the latest from what I can
    determine is 553B.
    
    On my TLZ6L the fw rev is 4BQE, latest is 4BQH.
    
    I will supply more info as it becomes available.
    
    Gene
    NSR Support
    
            

    Gene,
    
    I had what may be a similar problem with a TLZ6L and compressed mode.
    Please check out IPMT UVO104604 and QAR48007 to see if they are relevent.
                                                           
    Regards,
    Colin S.