Is there a way to tell if this is an SMR or CMR drive?

Completely untrue. The Red Pro line are all CMR. The WD101EFBX is from the Plus line, which is also CMR, but not as good.

The WD Red Pro 10TB NAS Hard Disk Drive uses CMR (Conventional Magnetic Recording) technology.

Questions & Answers: WD Red Pro 10TB NAS Hard Disk Drive - 7200 RPM 3.5"

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WD Red Pro 10TB NAS Hard Disk Drive - 7200 RPM Class SATA 6Gb/s 256MB Cache 3.5 Inch - WD102KFBX

Available in capacities ranging from 2 to 22TB with support for NAS systems with up to 24 bays
Supports up to 300TB/year workload rate
Enhanced reliability with 3D Active Balance™ Plus technology and error recovery controls with NASware™ 3.0 technology
Extended drive testing to ensure each drive is tested for extended reliable operation
5-year limited warranty

Out of Stock