It doesn't matter. The appearance of the message itself usually meant the drive/disk was dead and there was nothing you could do about it. Even worse, program

It doesn't matter. The appearance of the message itself usually meant the drive/disk was dead and there was nothing you could do about it. Even worse, programs almost never handled this gracefully so if you were trying to save your work it was effectively lost and you might as well ctrl-alt-del, even if you had another disk or drive (already attached).