[US] B&H Photo 12TB Elements for $190 ($15.83 TB) (27 Oct 21 Only)

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unmesh

Active Member
Apr 17, 2017
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One would think that, unless the areal density of the platter has somehow changed, the difference in RPM would show up in the performance of a long sequential read.

CMR vs SMR is much more difficult to tell apart since I believe it is an edge case involving read modify writes between the drive interface electronics and the platter. This article on STH shows a dramatic difference during resilvering of a RAID array


Added: Some posters say that SMR drives report that they support TRIM whereas CMR drives don't. In Linux, 'sudo hdparm -I /dev/sdX' should tell you.
 
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likelinus

New Member
Mar 9, 2016
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I haven't heard of WD making a 14TB drive that is SMR. Most reports say over 8TB is CMR.


https://www.reddit.com/r/DataHoarder/comments/o7fmhx
"WD140EDGZ-11B1PA0 passed my stress-tests. Linux smartctl indicates they are helium-filled, 7200rpm drives."
 
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