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Unable to lock the disk. Boot your computer from a linux-based media

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I just started having this issue. I have successfully been using ATI 2019 on several Windows 10 / 64 machines to backup and restore to for the past 6 months.  I have used the WinPE restore DVD over a dozen times during this period to do a full partition restore; "C" drive. It has worked flawlessly.  Today, and after multiple attempts, after booting from the rescue media CD, I noticed that it no longer loaded and listed all the TIB files found on any attached drives. I had to manually "Browse" for backup files, select the one I wanted and then right mouse on the file and select "Recover".  After selecting "C" drive partition and Next, I am now getting this message:

"Unable to lock the disk. Boot your computer from a Linux based bootable media and try again"

I also have another laptop that I am using ATI 2019 on that I am going to try and see if I receive the same message. 

This is a confidence breaker for me as I do not understand what changed since it is the same machine, hard drive, WinPE recovery disk and ATI 2019 product.

 

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Doug, welcome to these public User Forums.

One of the common causes for the disk being reported as locked is because Windows was not fully shutdown before launching the Acronis rescue environment.  This is typically because Windows Fast Start is enabled intended to make the OS start faster where it is put into a hybrid sleep state akin to hibernation, and so locks the disk to prevent change while in this state.

The first option is to perform a full shutdown of Windows by holding a Shift key while clicking on Shutdown, then booting the PC from the Acronis rescue media (matching the BIOS boot mode of the OS with the rescue media).

An alternative option if intending to recover an entire disk with all partitions, is to click on Tools in the rescue environment, then use the Add new disk option to initialise the target disk and leave this as being unallocated space ready for Recovery to re-partition the drive and restore data.