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DVD backups not bootable even with Acronis option saying it should

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2 days ago I bought PC Backup & Recovery Acronis True Image Backup 2011 because I needed to rebuild my PC (see signautre for specs). After setting up my PC to a minimal level, I installed and launched Acronis. I started a partition backup of the whole PC toward DVD medias (lots of empty partition). I had set the options to maximum compression and to include Acronis on it. I started the backup and it created 2 DVDs (minimal level is about 23Gb of actual data). I wasted about 5 DVDs until I managed to get it working right (once failed on file not found ???).

I used the automatic validation option but it was working weird : checking only about 20% of the first media then asking for the *.tib file, puting the 2nd DVD and running for 2 min to finally end (progress bar hadn't passed the 30%). It sais my DVD backup is fine.

So I tried booting my PC with the first media in. I did not get detected as a bootable media. So I restarted with the 2nd DVD in. It did not get detected as a bootable media. I do not understand why as I was able to boot with DVDs for the past 2 days (ex: Ubuntu Live CDs).

Why Acronis does't make my DVD backup as true bootable even if I used the options to put all Acronis softwares on it (full, safe, ...) ?

I want to make a full DVD backup first then put up weekly backups on a partition. But if I cannot even have a bootable DVD version ...

Is it a bug ?

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I want to make a full DVD backup first then put up weekly backups on a partition. But if I cannot even have a bootable DVD version ...

I'm not sure if it can make an incremental or differential backup if the full backup is located split on several DVDs. Most likely no, and even if yes, it will require you to change DVDs many times. You may try to create bootable media first, then create split backups and burn them separately. At least it gives you more control over it if one of DVDs is bad.

ps. despite what retail packaging says, the right subforum for it is 'true image home' in 'Acronis Home & Home' section.