Something strange has happened to me.

In the post Unable to recover hard disk drive after failed formatting due to sudden power outage, the user asked for ways to fix his failed WD disk.

I have posted an answer detailing free tools by WD for analyzing and repairing their disks. The poster has indicated that this answer was his last hope and criteria before junking the disk, when suddenly the answer was deleted by a moderator without explanation.

Now a deletion by a moderator of an answer is a very serious matter, since only a moderator may undelete it, the community having no voice in the matter besides a discussion on Meta. In utter incomprehension, I improved somewhat the answer and flagged it, asking the moderator to undelete, but nothing happened in two days of waiting.

I am very puzzled. I have scrutinized the explanations in Why and how are some answers deleted? and can see none that applies to my answer. The format of the answer is one I have used in hundreds of other answers, and it is certainly not link-only. The answers that were left on the post are all saying that this is logical for such an old disk, but do not offer any tools to verify its status.

So I ask the community: What is so unacceptable about my answer that it merits delete on sight without explanation?