chico11mbit Posted January 19, 2014 Report Share Posted January 19, 2014 Hi, we test Retrospect with a Tandberg Streamer LTO-6 / SAS on MacPro 3.1 with SSD. Max. Speed is 3,2GB/min. Is that the maximum speed in working environments? We think it is a little bit slow for that kind of tape and if it the max. speed we don't think we can use Retrospect because of the massive Data we work with. Quote Link to comment Share on other sites More sharing options...
Lennart_T Posted January 19, 2014 Report Share Posted January 19, 2014 A 6 year old Mac Pro and you expect fast speed by todays's standards? What kind of files are you testing? Many small file versus a few large files? Highly compressable data versus already compressed files? I think it is more hardware related than software related. What kind of speed do you get when testing the SSD? http://hints.macworld.com/article.php?story=20120704113548693 Does Tandberg have a test program for Mac? What kind of speed do you get there? Quote Link to comment Share on other sites More sharing options...
chico11mbit Posted January 19, 2014 Author Report Share Posted January 19, 2014 Hi Lennart, the files are big movie files (10GB and more). When writing back to the SSD we get 3,2gb/min speed. The SSD speed test gave us 180mbyte/sec. Hardware compression is on in Retrospect, no software compression and no Crypting Here is the output of the tandberg diagnostic tool: >>> Tape IO Test Start Param: WR, 64, Random Data Checking block size info...Completed Setting block size info...Completed Get current compression status - Enabled Disabling compression...Completed Rewinding...Completed Resetting IO log parameters...Completed Writing logical beginning of tape...Completed Writing 1.000 MB data to the tape...Completed Retrieving log status parameters...Completed Write Transfer Rate = 7331 MB/min Rewinding...Completed Locating the first data...Completed Reading 1.000 MB data from the tape...Completed Retrieving log status parameters...Completed Read Transfer Rate = 8099 MB/min Rewinding...Completed Erasing Tape...Completed >>> Tape IO Test Passed So you mean the Mac Pro ist the bottleneck for the i/o of retrospect? Then the only way is to buy a Thunderbolt - PCIe Case (i.e. Sonnet) for a brand new Mac Mini Server, I think. A 6 year old Mac Pro and you expect fast speed by todays's standards? What kind of files are you testing? Many small file versus a few large files? Highly compressable data versus already compressed files? I think it is more hardware related than software related. What kind of speed do you get when testing the SSD? http://hints.macworld.com/article.php?story=20120704113548693 Does Tandberg have a test program for Mac? What kind of speed do you get there? Quote Link to comment Share on other sites More sharing options...
Lennart_T Posted January 19, 2014 Report Share Posted January 19, 2014 Try another backup software on the same hardware and see what happens. Yes, I mean the old Mac Pro is the bottleneck. You always have buffers in RAM, no matter which software you use. Your Mac only has DDR2 RAM and only 800MHz speed. Even a slightly never Mac Pro (version 4,1) has DDR3 RAM and a faster system bus. http://www.mac-forums.com/forums/apple-desktops/258404-mac-pro-3-1-8-core-model-mac-pro-4-1-4-core-model.html Mactracker quotes Geekbench tests on a 3.1 with 2.8GHz at 7,685.A 4.1 with 2.93GHz returns a reading of 14,904. Twice as fast. 1 Quote Link to comment Share on other sites More sharing options...
chico11mbit Posted January 19, 2014 Author Report Share Posted January 19, 2014 ok. thank you lennart. i will have a look... Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.