Perhaps it's only my fault, but I cannot understand how synthesized backups on tape works (even after reading the docs I found).
All my clients make daily reverse incremental backups on NAS repository (with 30 and 60 recovery point depending on the job), and every Sunday they save the last full backups of the week on tape for off-site archiving & DR. Everything went smooth with version 7. One of them recently upgraded to v8 and the things with tape are going wrong...
With v7 I made a tape job, scheduled every Sunday and without the option to process incrementals; the job took the vbk for every specified backup job and copied it on the tape. Tape space usage was barely the sum of the vbks and the time consumed was the time needed to transfer the data on the tapes. Everything worked as desired and as expected.
With v8 the "synthesized backup saga" begun. The tape job option are exactly the same as the old v7 job (I made an upgrade in-place), but it doesn't work as expected anymore. When the job starts It makes synthesized backup of all the reverse incrementals (and I cannot absolutely understand why it should consider vrbs when I specified to not consider incrementals) and this takes an incredible amount of time, about 40% of the total time of the job (it makes 30 to 60 unnecessary synthesized backups for every job, one for every vrb) and that causes the backup not to finish in the allowed backup window. In addition the space usage on tape is considerably higher than before (40% to 80% more than before) and it causes problems with media export for the backup operator (3 tapes on v7, 4-5 tapes on v8 and only 3 export bay).
Can someone explain this odd behaviour? Is there a method to make B&R act in the desired way (as in v7) where only the last full backup is copied on tape? I could workaround this problem creating a file copy job and saving only the vbks, but this implies the impossibility to directly restore from tape (and, frankly, this is also the reason because some of my clients bought the enterprise version instead of standard, so its important for me to make the things work as expected).
Thanks in Advance