dtgriscom Posted March 12, 2002 Report Share Posted March 12, 2002 I'm using Retrospect Desktop 4.3 under MacOS 9.2.2, storing into an OnStream SC30e tape drive. I'm having trouble getting software compression to function reliably. It seems that in some situations, an entire drive will get backed up with 0% compression, even though I know there are plenty of compressible files. I've attached the log for a backup I did last night. Hardware compression is disabled (doesn't exist anyway), and software compression is enabled. I'm doing an initial backup up from three subvolumes. The first (700MB) compressed 22%. The second (5.7GB) compressed 0% (!!). The third (460MB) compressed 34%. And the total compression is listed as 0%. This is weird. That middle volume has lots of compressible items (I checked with the "~Compression filter" selector, and over 90% of the files would have been compressed). Plus, even if the individual volume compressions were as listed, the total should have been around 4-5%. Any idea what's up? There's at least a bug in the display of the total compression value: is that middle volume actually getting compressed and its "0%" is the result of another display bug? Or is there some configuration issue that I'm missing? (I'd really rather not pay the $70 to get assistance for this one issue...) Thanks, Dan P.S. Here's the log: ? Retrospect version 4.3 launch at 3/11/2002 9:48 PM + Normal Backup using G4 Backup at 3/11/2002 9:53 PM To backup set G4 Weekly 1… - 3/11/2002 9:53:06 PM: Copying Apps on Macintosh HD ! 3/11/2002 9:55 PM: Manual erase of tape named “” 3/11/2002 10:03:17 PM: Comparing Apps on Macintosh HD 3/11/2002 10:09:25 PM: Execution completed successfully Completed: 12074 files, 700.9 MB, with 22% compression Performance: 112.2 MB/minute (98.4 copy, 130.5 compare) Duration: 00:16:19 (00:03:50 idle/loading/preparing) - 3/11/2002 10:09:26 PM: Copying Documents on Macintosh HD 3/11/2002 11:32:04 PM: Comparing Documents on Macintosh HD 3/12/2002 12:37:57 AM: Execution completed successfully Completed: 15333 files, 5.7 GB, with 0% compression Performance: 87.5 MB/minute (83.1 copy, 92.5 compare) Duration: 02:28:31 (00:15:41 idle/loading/preparing) - 3/12/2002 12:37:57 AM: Copying System Folder on Macintosh HD 3/12/2002 12:44:48 AM: Comparing System Folder on Macintosh HD Different modify date/time (set: 3/12/2002 12:38:09 AM, vol: 3/12/2002 12:44:49 AM) for file “System Folder:Preferences:Power On Preferences:Recent Items Database:Local Applications Database”. Different modify date/time (set: 3/12/2002 12:38:09 AM, vol: 3/12/2002 12:44:49 AM) for file “System Folder:Preferences:Power On Preferences:Recent Items Database:Recent Applications Database”. 3/12/2002 12:50:41 AM: 2 execution errors Completed: 5802 files, 465.8 MB, with 34% compression Performance: 125.3 MB/minute (112.6 copy, 141.1 compare) Duration: 00:12:44 (00:05:18 idle/loading/preparing) 3/12/2002 12:50:41 AM: 2 execution errors Total performance: 91.4 MB/minute with 0% compression Total duration: 02:57:35 (00:24:49 idle/loading/preparing) Shutdown at 3/12/2002 12:50 AM Link to comment Share on other sites More sharing options...
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