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1. LinuxWalt (@lnxw48a1) {3EB165E0-5BB1-45D2-9E7D-93B31821F864} (lnxw48a1@nu.federati.net)'s status on Tuesday, 21-Apr-2020 18:03:02 UTC LinuxWalt (@lnxw48a1) {3EB165E0-5BB1-45D2-9E7D-93B31821F864}
   Interesting conversation about Western Digital "Red" HDDs for #NAS devices https://freeradical.zone/@tek/104037571132363249 ... he links to [1] in the OP.
   
   "Western Digital, Seagate and Toshiba have begun selling SMR drives without labeling them as such, thus revealing a large controversy, as SMR drives are much slower in some circumstances than PMR drives.[9] These practices were used to be in both data storage-dedicated (for servers, NASes and cold storage) and consumer-centric HDDs." [2]
   
   Also, #TIL: SMR (Shingled magnetic recording) [3], PMR (Perpendicular magnetic recording) .
   
   The OP explains why this is an issue in [4] and [5] and [9].
   
   Also, #TIL (Today I learned) the terms: LMR (longitudinal magnetic recording [6], and PMR (Perpendicular magnetic recording) [7] ... I already knew generally about both processes, but did not have specialized terminology for them. (CMR [8] is a rename of PMR.)
   
   References:
   [1] https://blog.westerndigital.com/wd-red-nas-drives/
   [2] https://en.wikipedia.org/wiki/Shingled_magnetic_recording
   [3] https://www.storagereview.com/news/what-is-shingled-magnetic-recording-smr
   [4] https://freeradical.zone/@tek/104037775889323461
   [5] https://freeradical.zone/@tek/104037804715066031
   [6] https://en.wikipedia.org/wiki/Magnetic_storage
   [7] https://en.wikipedia.org/wiki/Perpendicular_recording
   [8] https://blag.nullteilerfrei.de/2018/05/31/pmr-smr-cmr-i-just-want-a-hdd-mr/
   [9] https://freeradical.zone/@tek/104037879736589923
   
   All the NAS units I've purchased (possibly excepting #sonOne's, since I did not buy drives for him) also got WD Red NAS drives. Possibly they were older PMR/CMR drives, but since WD did not properly label their products, I do not know.
   • LinuxWalt (@lnxw48a1) {3EB165E0-5BB1-45D2-9E7D-93B31821F864} (lnxw48a1@nu.federati.net)'s status on Tuesday, 21-Apr-2020 18:06:37 UTC LinuxWalt (@lnxw48a1) {3EB165E0-5BB1-45D2-9E7D-93B31821F864}

     in reply to
     The [9] in the Wikipedia quote above points to https://www.tomshardware.com/news/sneaky-marketing-toshiba-seagate-wd-smr-drives-without-disclosure
     
     I'm just now learning of this, but I feel it is slimy beyond belief. If you know that the drive you're selling won't be able to complete a RAID rebuild, do not sell it as specialized for NAS devices, where RAID is a requirement.
   • GeniusMusing (geniusmusing@nu.federati.net)'s status on Friday, 24-Apr-2020 20:34:52 UTC GeniusMusing

     in reply to
     @lnxw48a1
     WD Sets the Record Straight: Lists All Drives That Use Slower SMR Tech Tom's Hardware
     https://www.tomshardware.com/news/wd-lists-all-drives-slower-smr-techNOLOGY
     LinuxWalt (@lnxw48a1) {3EB165E0-5BB1-45D2-9E7D-93B31821F864} repeated this.