PJorge1982 Posted June 30, 2016 Report Share Posted June 30, 2016 Hello everyone,I have a Media Set that have eleven tapes. In the last days the eleven tape was filled with info, and the restrospect, is asking the next tape, twelve's, but this tape it doesn't exist. As you can see in print, I have other tapes with space , including one, two, that are in the robot. How can i make Retrospect use the space that is free in these tapes ?Thank's in advance. PJ Quote Link to comment Share on other sites More sharing options...
Lennart_T Posted June 30, 2016 Report Share Posted June 30, 2016 How can i make Retrospect use the space that is free in these tapes ? Retrospect uses the tapes until they are full (or you get a serious error), so there is no free space. The problem is that Retrospect assumes 2:1 compression when calculating tape capacity. Not many types of files can be compressed that much. So you can't fit as much data on each tape as that window-list says you can. The window presentation is wrong. Just put in a new tape and continue with the backup. Quote Link to comment Share on other sites More sharing options...
Lennart_T Posted June 30, 2016 Report Share Posted June 30, 2016 By the way, your screen shot is not readable. It contains too few pixels. How many pixels is your original? Is it the forum that reduced the size (in pixels)? Quote Link to comment Share on other sites More sharing options...
PJorge1982 Posted July 1, 2016 Author Report Share Posted July 1, 2016 Hy Lennart, Here is a better sized print Thanks for the explanation. But as you can see the eleven's tape e full. With 0 free space, but the others have so much space... I understood what you said, that, in the total tape space , 3TB , only half can it be written . Correct me if I'm wrong . Thanks in advanced PJ Quote Link to comment Share on other sites More sharing options...
Lennart_T Posted July 1, 2016 Report Share Posted July 1, 2016 Column 1: Tape name Column 2: Number of bytes stored on tape Column 3: Number of free bytes on tape, PROVIDED THE NOMINAL CAPACITY IS CORRECT Column 4: Nominal capacity, assuming 2:1 compression Column 5: Probably the bar code on the tape It looks like tape 11 is full and the number of free bytes (column 3) is 0. It should be 0 for tapes 1-10 as well. That is a bug in Retrospect. Your type of data doesn't compress well, which is typical nowadays. The average tape capacity seems to be 1.7-1.8 TB, just a bit over the native (uncompressed) tape capacity of 1.5 TB. So you have a limited number of files that can be compressed. File types that does not compress well (since they are already compressed): Video files, most image files, most audio files, most pdf files, all zip files (and other kinds of "archives", for instance disk image files). File type that compresses well: Pure text files File types that are in between the two types above: Apps, word processor documents, spreadsheet documents. Quote Link to comment Share on other sites More sharing options...
Lennart_T Posted July 1, 2016 Report Share Posted July 1, 2016 More about tape capacity: http://www.retrospect.com/en/support/kb/tape-capacity-faq Quote Link to comment Share on other sites More sharing options...
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