I was wondering why I could read so many opposing opinions about the volume of the same WD Red (Plus) hard drives. At first I thought it was probably because of how different our perceptions are. But after these scary articles and especially the official statement from WD "For select products, Western Digital has published RPM speed within a "class" or "performance class" for numerous years rather than publishing specific spindle speeds. We also fine-tune select hard drive platforms and the related HDD characteristics to create several different variations of such platforms to meet different market or application needs" makes a lot of things clear to me and although I was planning to order my NAS HDDs today under the digitec WD promotion, I am now finally refraining from doing so. At least with Iron Wolf I know that they are noisy 7200 rpm drives. At least with Iron Wolf I know that they are loud 7200 rpm disks and not from an undefinable 5400 RPM CLASS which then do not have 5400 rpm at all but 7200 rpm with a lot less performance. https://www.hardwareluxx.de/index.php/news/hardware/festplatten/54073-hwl-nutzer-deckt-irrefuehrende-rpm-angaben-bei-wd-festplatten-auf.html https://www.reddit.com/r/DataHoarder/comments/ikk0rv/psa_multiple_wd_5400rpm_drives_are_actually/ https://arstechnica.com/gadgets/2020/09/western-digital-is-trying-to-redefine-the-word-rpm/