No, it's not weird at all those old scsi drives go bad when they want too, yeah some times you can get them back going with some tricks, But it's better to get a drive that is reliable!

You could give it a hard firm wap with a hammer, you could throw the hard drive in the freezer for a while, you could bake it in the oven at 200 degrees for a while, take the cover off and hold the head over so it won't spin down,

But is all temporary fixes,