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Error -1104 (device not ready)

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O/S - Windows 10 Home 64 bit Retrospect 12.6.1 Desktop for Windows.  Back up device - Western Digital Elements (3TB)

I got the following error message for an incomplete back up.  Could the issue lie with the external hard drive?  - Fred

+    Executing Immediate Backup at 2/17/2019 14:40
        2/17/2019 14:40:23: Finished scanning backup set data files
    To Backup Set Backup Set H...

-    2/17/2019 14:40:22: Copying Windows (C:)
        2/17/2019 14:41:31: Found: 311,602 files, 52,167 folders, 158.8 GB
        2/17/2019 14:41:31: Finished matching
        2/17/2019 14:41:33: Copying: 244,513 files (149.2 GB) and 67,088 hard links
        [*] --ERR-- (18044) BackupReadCloseAsync: err=-1104
        File "C:\Users\freis\Google Drive\Yes Montreux Video Project\Montreux Sessions\DVD - NTSC\Yes Montreux Sessions 2016 Edition DVD NTSC\VIDEO_TS\VTS_02_1.VOB": can't read, error -1104 (device not ready)
        Trouble reading files, error -1104 (device not ready)
    2/17/2019 15:30:04: Execution incomplete        Remaining: 112110 files, 57.9 GB
        Completed: 132403 files, 91.4 GB
        Performance: 1934.7 MB/minute
        Duration: 00:49:41 (00:01:18 idle/loading/preparing)

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Just an update to my topic.  I had the Ext HD connected to the following device:

[2nd Gen]TP-Link 9-Port USB 3.0 Hub with 7 USB 3.0 Data Ports and 2 Smart Charging USB Ports. Compatible with Windows, Mac, Chrome & Linux OS, with Power On/Off Button (UH720)

I decided to run the back up job connected directly to the computer and it completed and it is currently comparing the back up.  So it may an issue of the hub.  The hub is A/C powered.


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From the error it looks like it is your C: drive that causes the problem ("can't read error"). 

If it was the destination, the error should say "can't write error" or something like that.

I would check the C: drive, both the S.M.A.R.T. status as well as doing a surface scan. (Windows CHKDSK does not do a surface scan.)

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