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Occasional hang when backing up to DVD

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When backing up to an external, USB2.0 connect HPdvd840, I sometimes get a hang, and then an error saying "Trouble communicating".


The log is as follows:-



+ Normal backup using E Drive DVD at 02/11/2006 09:44

To Backup Set E Drive DVD 1...


- 02/11/2006 09:44:04: Copying DRV2_VOL1 (E:)

Trouble writing: "4-E Drive DVD 1" (1487142912), error -102 (trouble communicating)

02/11/2006 09:45:52: Snapshot stored, 2,563 KB

02/11/2006 09:53:18: Comparing DRV2_VOL1 (E:)

Trouble reading: "E Drive DVD 1" (181), error -100 (device rejected command)

02/11/2006 09:54:20: Execution incomplete

Remaining: 1693 files, 271.6 MB

Completed: 0 files, zero KB, with 6% compression

Performance: 226.2 MB/minute (246.8 copy, 0.0 compare)

Duration: 00:10:16 (00:09:04 idle/loading/preparing)

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Thank you for your reply. In answer to your question, I had to custom configure it, but it claimed to succeed.


I would have thought, though, that HP was a fairly well known brand, so I wouldn't have expected any problems.


The device is directly connected, but I will try disabling any other devices.


The problem is only occasional - most times, it works fine.


Also, there is no indication of whether the backup is of any use, or what to do next. Can I continue using that volume set, or should I have to start with another full backup each time this occurs?


Thank you.



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HP is indeed a well known brand, but they are not well known because of their optical drives. Even if custom configuration is succesful, it is merely a series of test commands to see if Retrospect can work with the device. It does not always reflect how the device will respond to the demands of extended data writes.


The errors posted from your log are due to fairly low level issues - the device was not cooperating on some basic level. I would strongly recommend seeking another device for backups, a supported optical drive or perhaps just an external hard drive. You can view recently supported devices on the RDU version history page:


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