Not exactly. It is quite possible that, as a computer would, your unit has "learned" where the bad sector is and no longer uses it. The software is capable of doing that.Zephyr said:
There are, clearly, problems with the 6.3e upgrade (Since declaring it to be all disk related, I have had two problems with one unit. Two programs have failed to record because there was "no signal." There clearly was signal. And, I've noticed that in the Channel List setup feature, I can not directly go to a channel by punching in the number. Any number I punch in brings me to channel 2, the top of the list.)
Yours, however, is clearly not 6.3e related since, by your own reporting, the problem precedes the update. It surely does sound, in that case, like a hard drive issue. I don't see what else you think it could be.