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- Sun Proprietary/Confidential: Internal Use Only -
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                        FIELD INFORMATION NOTICE
                  (For Authorized Distribution by SunService)

FIN #: I0519-1

Create Date: Sep/16/99

Keywords: 

Networker may attempt to position a DLT7000 volume to read the label before the drive has completed the load sequence

Top FIN/FCO Report: No

Products Reference: default load_sleep value

Product Category: Storage / SW Admin; Software / Unbundled;

Product Affected: 

Mkt_ID   Platform   Model   Description       Serial Number
------   --------   -----   -----------       -------------
Systems Affected
----------------

   -     ANYSYS      -     System Platform Independent    -


X-Options Affected
------------------

X6063A     -       -       35-70GB DLT 7000 for L1800 or L3500    -
X6073A     -       -       StorEdge L1800 w 2 DLT 7000 drives     -
X6074A     -       -       StorEdge L1800 w 4 DLT 7000 drives     -
X6075A     -       -       StorEdge L3500 w 2 DLT 7000 drives     -
X6076A     -       -       StorEdge L3500 w 7 DLT 7000 drives     -
G-XLIBDLT1-1TB     -       StorEdge L1000 Library Deskside        -   
SG-XLIBDLT4-1TB    -       StorEdge L1000 Library Deskside        -   
SG-XLIBDLT1R-1TB   -       StorEdge L1000 Library Rackmount       -
SG-XLIBDLT4R-1TB   -       StorEdge L1000 Library Rackmount       -
SG-XTAPDLT1-1TB    -       StorEdge DLT 7000 Drive for L1000      -
X6073A     -       -       StorEdge L1800 w 2 DLT 7000 drives     -
X6074A     -       -       StorEdge L1800 w 4 DLT 7000 drives     -
X6075A     -       -       StorEdge L3500 w 2 DLT 7000 drives     -
X6076A     -       -       StorEdge L3500 w 7 DLT 7000 drives     -
X6063A     -       -       5-70GB DLT 7000 for L1800 or L3500     -
SG-XLIBDLT1-280G  -   -    StorEdge  Autoloader (Deskside)        -
SG-XLIBDLT2-280G  -   -   StorEdge  Autoloader (Rackmount)        -

Parts Affected: 

Part Number   Description         Model
-----------   -----------         -----

794-7575-01   SBU SERVER EDITION  ALL

References: 

N/A

Issue Description: 

The DLT7000 has a minimum load time of 48 seconds (previously written)
this time may be longer if the tape is blank.  The networker product
has no understanding of the DLT's "time to load" or for that matter,
any other tape library's "time to load" value, and may attempt to
position the volume to read the label prior to the drive being at BOT.

Should this be the case, one of the following errors may be returned
during the mount request:

     tape: verify label operation in progress
     media warning:tape  opening io error
     open error

Should this type of problem exist, first check the tape library
documentation for the manufacturers quoted time to load the tape to 
the BOT mark.  This is the time to use plus a 10% safety margin for
equipment variations since all equivalent tape libraries are not
exactly equal in mechanical functioning.  For example, if the
manufacturer states that it takes 85 seconds to load the tape to the
BOT mark, then set the value of the load_sleep variable to 85 seconds
plus an additional 8.5 seconds or rounding off, set the value to 94
seconds.  This should allow the tape drive to load the tape and advance
to the BOT and be ready for either the read or write function to occur
normally.

Implementation: 

---
        |   |   MANDATORY (Fully Pro-Active)
         ---    
         
  
         ---
        |   |   CONTROLLED PRO-ACTIVE (per Sun Geo Plan) 
         --- 
         
           
         ---
        | x |   REACTIVE (As Required)
         ---

Corrective Action: 

Enterprise Customers and Authorized Service Representatives may avoid
the above mentioned Networker problem by following the recommendation
shown below: 


1.  Set the load_sleep parameter to a value in seconds.

    For example, "load_sleep=300" will cause nsrjb to wait for 300 
    seconds before attempting the access the device.

The default value is insufficient and will not allow the drive time to
complete the tape load process.

If this option is not set (!load_sleep), then the default value is 0
seconds.

This delay was added to NetWorker for devices which return
asynchronously from the load operation before the device is ready.

Use the NetWorker Administration GUI (nwadmin) to set this parameter.

For Example in SBU 5.1.
 
>From the nwadmin GUI

    Select Media =v
                  v> Jukeboxes => View => Details => Jukebox options

    Type "load_sleep=n" where n is the number of seconds or use the 
    up/down pointers to change the value

For Example in SBU 5.5.1
 
>From the nwadmin GUI

    Select Media =v
                  v> Jukeboxes => View => Details => load sleep

    Type load sleep column "n" where n is the number of seconds or
    use the up/down pointers to change the value

Comments: 

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Implementation Footnote: 

i)   In case of MANDATORY FINs, Enterprise Services will attempt to    
     contact all affected customers to recommend implementation of 
     the FIN. 
   
ii)  For CONTROLLED PROACTIVE FINs, Enterprise Services mission critical    
     support teams will recommend implementation of the FIN  (to their  
     respective accounts), at the convenience of the customer. 

iii) For REACTIVE FINs, Enterprise Services will implement the FIN as the   
     need arises.
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-------------- 
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Supporting Documents:
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Internet Access:
----------------
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General:
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* Send questions or comments to finfco-manager@Sun.COM
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