63bda858-5080-4ac5-a935-a2f1399479d1 5 Report post Posted September 25, 2015 If, after having done a backup, some errors show up in the verifying phase I would expect Retrospect to take note of the files or part of files (if using the block level incremental system) that were not correctly done and mark them so they will be included in the next backup. But, when I see many errors, I restart the job and usually no file (nor a part of one) are backuped again. Can I be sure that the data is already backuped correctly?. My system uses a Retrospect Professional for Windows version 10.5 backuping to DVDs. Regards Agustín 2 Share this post Link to post Share on other sites
Lennart_T 152 Report post Posted September 25, 2015 Can I be sure that the data is already backuped correctly?. That depends on the type of error(s) you get. But normally the answer is "yes". Share this post Link to post Share on other sites
63bda858-5080-4ac5-a935-a2f1399479d1 5 Report post Posted September 28, 2015 Hi Lennart Sorry for having omitted important info. The usual error is a 206 (unable to read). So my question is if Retrospect was unable to read what has just written how can I be sure that the data have been backuped correctly? Regards Agustín Share this post Link to post Share on other sites
Lennart_T 152 Report post Posted September 28, 2015 Ouch, that doesn't sound too good. What kind of discs do you use? DVD-R or DVD+R. (You should use DVD+R.) Share this post Link to post Share on other sites
63bda858-5080-4ac5-a935-a2f1399479d1 5 Report post Posted September 28, 2015 DVD+R. Share this post Link to post Share on other sites
Lennart_T 152 Report post Posted September 28, 2015 Are the discs a kind of brand you have used before? Have you tried a cleaning disc in the optical drive? Share this post Link to post Share on other sites
63bda858-5080-4ac5-a935-a2f1399479d1 5 Report post Posted September 28, 2015 Yes, always the same brand, Imation. If I have to change brand I do a new "calibration" of the device. And yes I clean the drive from time to time. But my question was about the reliability of Retrospect as it does not asks for a rebackup of the parts which cannot read after writing them. Now I think a possible solution will be to force the repeat declaring the problematic disc lost and rescheduling the backup(s) written there. It can be done but I think this should be done by Retrospect itself. Or am I missing something? Share this post Link to post Share on other sites
Lennart_T 152 Report post Posted September 28, 2015 Is it just one disc? Then mark it as "lost" and do another backup, just as you suggest. Yes, Retrospect should backup files with verification errors automatically during the next backup. I have no idea why it does not. Sorry. (But for verification WARNINGS, the files should be fine. I think of files modified between the backup and the verify, such as log files.) Share this post Link to post Share on other sites
63bda858-5080-4ac5-a935-a2f1399479d1 5 Report post Posted September 28, 2015 Thanks for your time. I would ask support. Regards Agustín Share this post Link to post Share on other sites
63bda858-5080-4ac5-a935-a2f1399479d1 5 Report post Posted September 28, 2015 Support has told that the -206 error is a very serious media failure and because you can not trust the disc must mark it as lost to get the files backuped again. Also told that using DVDs are not recommended because, as most users backup to hard disks, tape and NAS devices, they do not plan to certify new DVD hardware in the future. Share this post Link to post Share on other sites
