cwf Posted March 22, 2003 Report Share Posted March 22, 2003 I've recently upgraded to OSX. I'm backing up the host and 1 OSX Client along with one OS9 client. I see that the OS9 client usually shows about 30% compression, but the OSX clients ALWAYS show 0% compression. Anyone know what's up? Does software compression not work with OSX? (backing up to DVD superdrive) Thanks, and Hello to all...... Chris Link to comment Share on other sites More sharing options...
Mayoff Posted March 24, 2003 Report Share Posted March 24, 2003 The compression FAQ may be helpful. Zero % would mean that the average files on the disk are NOT compressing. http://www.dantz.com/index.php3?SCREEN=common_questions_detail&ACTION=COMMON_QUESTIONS_DETAIL&id=49 Link to comment Share on other sites More sharing options...
cwf Posted March 31, 2003 Author Report Share Posted March 31, 2003 Thanks but I read the FAQ before I bothered to post...... The answer to my original question was not to be found, I was looking for a more 'informed' source. Interestingly, the same system, backed up with Retro 4 running on an OS9 host consistently shows compression. But v5 running on a OSX host shows 0% compression. All else is equal, same network, same data etc. Link to comment Share on other sites More sharing options...
CallMeDave Posted March 31, 2003 Report Share Posted March 31, 2003 Quote: Interestingly, the same system, backed up with Retro 4 running on an OS9 host consistently shows compression. But v5 running on a OSX host shows 0% compression. All else is equal, same network, same data etc. Your original post stated that "the OS9 client usually shows about 30% compression, but the OSX clients ALWAYS show 0% compression." But since Retro 4 does can not communicate with OS X Clients, how can all else be equal in your test? Here's what I just tried: - OS X Client 5.0.540 running on OS X Server 10.2.4 - Retrospect 5.0.238 running on OS X 10.2.4 - Log in Client and define /private/var/ as a sub volume - Immediate Backup to CD/DVD Backup Set, using CDR media in built-in Sony CRX155E - Configure Immediate Backup to use Software Compression and Not Compress Catalog - Results: + Executing Immediate Backup at 3/31/2003 12:37 PM To backup set CDR Compression Test? - 3/31/2003 12:37:21 PM: Copying var on OfficeMail... 3/31/2003 12:37:21 PM: Connected to OfficeMail 3/31/2003 12:37:28 PM: Comparing var on OfficeMail... 3/31/2003 12:37:35 PM: Execution completed successfully. Completed: 121 files, 903 KB, with 71% compression Performance: 7.5 MB/minute (7.5 copy, 7.5 compare) Duration: 00:00:14 How do your steps differ, other then the format of your optical drive? Dave Link to comment Share on other sites More sharing options...
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