9710 (StorageTek) Addendum for NonStop Servers

Addendum to the StorageTek™ 9710 for the Tandem Environment
The 5155/5159 Digital Linear Tape CRE and NonStop Kernel
9-46
9.5.1 The Compression LED
The compression (Yellow) LED on the drive indicates when the
drive is processing compressed data. The LED lights when the
drive writes compressed data to tape or when the drive reads
compressed data to the tape drive buffer. The Compress LED turns
off when the drive reads or writes uncompressed data or tape marks
(also referred to as file marks).
9.5.2 Using TMDS to Check the Compression Mode Status
To determine the compression mode of the last write operation, use
the TMDS STATUS command. To use this command for a tape
drive named $TAPE1, enter:
>TMDS TAPE
TAPE>STATUS $TAPE1
For an example of the display, see “The STATUS Command”.
Notes:
• The TMDS STATUS command does not show the current
compression mode of the drive; rather, it shows the
compression mode of the last write operation. The display
reflects changes in the system-wide compression default setting
only after a write operation. To see the current compression
mode with TMDS, the TMDS MONITOR command can be
used. For more information, see the TAPE subsystem
information in the TMDS Reference Manual.
• The system default specification can be determined for
compression by using the MEDIACOM INFO MEDIADEFS
command as described in Steps 1 and 2 of “Using
MEDIACOM to Set the System-Wide Compression Default”.