Hi All,
The most common way of causing this problem is to just switch the B2 off without going through the proper power down procedure, which is to press and hold the 'Play/Stop' button (for a second or two) until the 'Saving' message is displayed in the front panel display.
This causes the B2's internal database management file (named 'b2db' to be written from the B2's memory to the HDD.
So, in my view, this issue does not 'just happen' in most events; it is down to careless or improper power downs. I have had a few situations where the Brennan has frozen,; in five years of using B2s and BB1s, I have had probably five freezes but only two of those have required a 'Scan Disk' to fix the problem.
Regards,
Peter.