That's what people talk about the WD Blue the thread starter was talking about: https://community.wd.com/t/wdi…ue-drives-any-help/193353
WD Greens were set to park after 5 seconds idle time. By comparison, Reds are set to park after 300 seconds idle.
There were some quality control issues with Reds some time back, and a number of them shipped with the 5 second setting (as some folks have noted). This caused them to die in no time as NAS/low end server drives, and led to some conspiracy theories online that Reds and Greens were both the same, except for firmware settings and warranty.
"5400 RPM Class Blue" replaced Greens recently (at least in the US), and they also had the 5 second head parking. However, my most recently purchased Blue drive had parking set to 300, and not 5.
According to the internet, the latest generation drives won't work with WDIDLE3. WDIDLE3 wouldn't work on mine when I tested it, so I don't have reason to doubt that is true. I have found that idle3-tools on linux did work to manage firmware settings on my newer WD drives, where WDIDLE3 did not. This was just my experience, I can't guarantee it will work on all WD drives. It seems to me, in just my limited experience with WD, that there's some inconsistency in firmware settings from drive to drive, so there's no telling what will and won't work. I suppose there's a reason why those cost less and enterprise grade cost more, and you usually get what you pay for!