I would agree on merging [tag:4k-sectors] into [tag:advanced-format] and also synonymizing them.

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    updating post history, 20 rows affected
    updating posts, 14 rows affected
    updating PostTags associations, 13 rows affected
    removing/renaming old tag, 0 rows affected
    updating count for master tag, 1 rows affected
    tag remapping of [advanced-format] and [4k-sectors] complete!
    remapping 0 synonyms
    0 favorite and ignored tags remapped!
    Tag Synonym 4k-sectors -> advanced-format was approved!
    Broadcasting tag-engine reload