Enabling Native Tape Drive Compression on LTO5 and LTO6 Drives
Created: 14 Jun 2013 • Updated: 16 Jun 2013 | 7 comments
This issue has been solved. See solution.
Does anyone have a walk through on enabling tape drive compression(NOT software compression)? I've been doing some research and it appears commands such as: sdparm - <device>, and sginfo -a displays the following information:
Data compression (SSC) mode page:
DCE 1 [cha: y, def: 1, sav: 1]
DCC 1 [cha: n, def: 1, sav: 1]
DDE 1 [cha: n, def: 1, sav: 1]
RED 0 [cha: n, def: 0, sav: 0]
COMPR_A 255 [cha: n, def:255, sav:255]
DCOMPR_A 255 [cha: n, def:255, sav:255]
I have 6 Netbackup 5200 and 5220s connected to an IBM3584 with 12 LTO4, 5, and 6 drives via FC. The library and drives are functioning however, I'm not getting no where near the data compression on the LTO6 tapes that I thought I would. I'm only seeing about 3.1TB on a LTO6 tape.
Can someone explain the output above and what my settings should be. Thanks.