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backup corrupt - how to fix?

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My Acronis 2015 backup has not been working for a few days. When I try and run the backup manually I see:

This is not the last volume of the backup archive.

Click retry to try and read from the last location. To create a new version according to the backup scheme, click "Cancel".

Retry does not work and if I click Cancel I get:

Check whether the source and destination partitions exist.

The partitions do exist C:\ and S:\My backups\...

How do I create a new version as the message suggests?

Validation also fails. I have to assume this only pertains to the latest backup and not the four previous ones on the backup media. Acronis can see the backup media as can window Explorer. I can also access files on the media. I seem to recall the 2014 version would allow me view and manage versions of backups that were on the backup media. I could also delete individual versions if I wanted to. I can not find that feature in the 2015 version I am using.

I perform daily incrementals for 6 days and then a full. The media contains b50 through b53 complete with incrementals and a partial b54 which is way too small. How can I delete that b54 backup and resume normal backups? I tried moving the USB to a different port but it did not make a difference.

Operating System
    Windows 7 Professional 64-bit SP1
CPU
    Intel Core 2 Extreme QX9650 @ 3.00GHz    84 °F
    Yorkfield 45nm Technology
RAM
    16.0GB Dual-Channel DDR3 @ 666MHz (9-9-9-24)
Motherboard
    Dell Inc. 0F642F (Socket 775)    45 °F
Graphics
    DELL U2412M (1920x1200@59Hz)
    1535MB NVIDIA GeForce GTX 580 (EVGA)    115 °F
Storage
    931GB Western Digital WDC WD10 02FAEX-00Z3A SCSI Disk Device (SATA)    96 °F
    698GB Hitachi HDS721075KLA SCSI Disk Device (SATA)    99 °F
    1397GB Seagate FreeAgent USB Device (USB (SATA))    112 °F
    1397GB Western Digital WD My Book 1140 USB Device (USB (SATA))    85 °F
    2794GB Western Digital WD My Book 1230 USB Device (USB (SATA))    94 °F
    2794GB Western Digital WD My Book 1230 USB Device (USB (SATA))    90 °F
Optical Drives
    ASUS BC-12B1ST b SCSI CdRom Device
    HL-DT-ST BD-RE WH14NS40 SCSI CdRom Device
Audio
    Creative X-Fi Audio Processor (WDM)

0 Users found this helpful

It might help to see a screen capture of the Storage folder set to view in detail  mode, and with the backups sorted in date/time order.

It sounds like your task was created by a prior version of TrueImage and many of the backups also created by a prior version.

Most likelyk you ultimte choice will be to create a new backup task and start over with a new string of backups.

The new task should have a new name and point to a new sub-folder so there is no intermixing of old and new tib files.

Thanks for the suggestion, Grover, but this backup has been running successfully for about a year and the chain is only from the 2015 TI release. I believe the USB drive may have lost connectivity during the backup and corrupted it.  I saw your response to Kent about deleting version chains manually and tried that but it did not work.  What DID work was starting TI after I moved the corrupt version to another folder and noticed there was an "IGNORE" option in addition to retry and cancel. I selected that and the backup started and created a new full backup in concert with the rest of the version chain. The first incremental completed successfully this morning as well.

I have to say I am disappointed the maintenance console has been removed from the 2015 release and have to wonder why. I prefer functionality to window dressing anytime.

Thanks again.