# WD Red EFAX: CMR or SMR? Exact Model Answer

> WD20EFAX, WD30EFAX, WD40EFAX and WD60EFAX are documented as SMR by Western Digital. Treat other EFAX identities separately unless you have exact manufacturer evidence for that complete model.

This context describes the Cloudzat canonical page at https://cloudzat.com/wd-red-efax-cmr-or-smr/. Current or last-verified Amazon price and image status belongs on the canonical page and is intentionally not frozen here.

## Primary source
- [WD Red EFAX: CMR or SMR? Exact Model Answer](https://cloudzat.com/wd-red-efax-cmr-or-smr/index.md): Clean Markdown version of the full Cloudzat guidance.

## Related Cloudzat guidance
- [CMR/SMR hard-drive checker](https://cloudzat.com/cmr-smr-hard-drive-checker/)
- [Best CMR hard drives](https://cloudzat.com/best-cmr-hard-drives/)
- [Best CMR drives for NAS](https://cloudzat.com/best-cmr-hard-drives-for-nas/)
- [CMR vs SMR for NAS](https://cloudzat.com/cmr-vs-smr-for-nas/)
- [CMR vs SMR for ZFS](https://cloudzat.com/cmr-vs-smr-for-zfs/)
- [CMR hard-drive price per TB](https://cloudzat.com/cmr-hard-drive-price-per-tb/)
- [WD Red Plus CMR model list](https://cloudzat.com/wd-red-plus-cmr-model-list/)