Question about Compression - 0% at end?

[karma]

I've turned on compression and am using it for the first time.

 

So, in this session I backed up two drives. Each one had some compression applied (apparently). Yet at the end it says "0% compression". Why? Is this an error? Did I actually gain any benefit?

 

From my log (minor execution errors removed):

 

+ Executing Immediate Backup at 8/10/2009 5:03 AM

To backup set UltraMax1-080809…

 

- 8/10/2009 5:03:21 AM: Copying KL Studio G4 on Mac G4 MDD…

8/10/2009 5:03:21 AM: Connected to Mac G4 MDD

8/10/2009 7:49:00 AM: Comparing KL Studio G4 on Mac G4 MDD…

8/10/2009 9:26:43 AM: 9 execution errors.

Completed: 324329 files, 39.9 GB, with 30% compression

Performance: 311.6 MB/minute (248.5 copy, 417.5 compare)

Duration: 04:23:22 (00:01:30 idle/loading/preparing)

 

- 8/10/2009 9:27:00 AM: Copying Iomega 400GB 2 on Mac G4 MDD…

8/10/2009 12:54:09 PM: Comparing Iomega 400GB 2 on Mac G4 MDD…

8/10/2009 3:03:32 PM: 2 execution errors.

Completed: 244432 files, 64.7 GB, with 26% compression

Performance: 394.0 MB/minute (320.4 copy, 511.4 compare)

Duration: 05:36:32 (00:00:40 idle/loading/preparing)

 

8/10/2009 3:03:45 PM: 11 execution errors.

Total performance: 357.7 MB/minute with 0% compression

Total duration: 10:00:11 (00:02:10 idle/loading/preparing)

 

=== Specs ================================

Main machine:

MacPro Quad (2 x 3.0 Ghz Dual-Core Intel Xeon)

OS X 10.4.11, 12 GB RAM

Retrospect 6.1.230; driver update 6.1.15.101

Mac Clients: 6.2.234

Windows Clients: 7.6.107

 

Thanks, Stephen