Using Acronis True Image Home 2010 build 7,154. Windows 7.
I found another thread on this topic, and following the advice there ran
CHKDSK C: /R
Computer says no problem. (Comment: A little tricky to run -- it objects that it's blocked by someone else using the drive, but it volunteers to be queued for automatic execution on next startup. So I accepted that suggestion, rebooted, and sure enough a BW dot-matrix screen showed it running on startup. Seemed strange that it only ran for a few seconds. Then it reported ok.)
I would like to backup C: ("disk") to my backup medium. This worked fine multiple times recently up until one week ago. Now, I repeatedly get the and error log ending with something like
Operation with partition '2-0' was terminated. |Details:|Run list is corrupted. (0x7001C)| Tag = 0x89D94B01B483E24D