Rick asks:
>
> Could anyone tell me an easy way to find out if the setting for compression
> is enabled on
> a C1504B DDS tape drive. I looked at DEVCTRL.MPEXL.TELESUP, but it has no
> 'SHOW' option.

SYSDIAG/SCSIDDS will show you:

:sysdiag
DUI >run scsidds section=interactive ldev=7


SCSIDDS>modesense 4


   Which page to be displayed?
       0 -- All Supported pages
       1 -- Disconnect-Reconnect Page
       2 -- Device Configuration Parameters
       3 -- Medium Partition Parameters
       4 -- Data Compression Mode Page
       5 -- No Pages

   Your selection [0]>
4

       =============================================================
                               MODE SENSE DATA
       =============================================================

... (about 12 lines of numbers)

INTERPRETED DATA :
----------------
... (about 18 lines of info)
    -----------------------------------------------------------------
     PAGE CODE DATA:
Page Saveable Bit = 0
     There is no non-volatile RAM on the drive into which parameter
     data may be saved.
Page Code = 15 [ Data Compression Mode Page ]

Additional Length = 14 (number of remaining bytes in this page)
DCE - Data Compression Enable           = 0
DCC - Data Compression Capable          = 1
DDE - Data Decompression Enable         = 1
RED - Report Exception on Decompression = 0
Compression Algorithm                   = 32
Decompression Algorithm                 = 0


   SCSIDDS>exit

   DUI >exit


BTW, if you get an error like:

*** WARNING:  YOU NEED TO HAVE A self-maintainer/channel LICENSE TO
              RUN THIS PROGRAM.

when you try to run SCSIDDS from SYSDIAG, immediately call Rich Sevcik
at HP, and ask him what the password is...the one he said wouldn't be there.

--
Stan Sieler                                          [log in to unmask]
                                     http://www.allegro.com/sieler.html