# WD Red SMR Model List: Exact EFAX Drives to Know

> WD20EFAX 2TB, WD30EFAX 3TB, WD40EFAX 4TB and WD60EFAX 6TB are listed by Western Digital as SMR. Do not turn “EFAX” into a universal suffix rule across every historical WD product; match the complete model number.

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

## Primary source
- [WD Red SMR Model List: Exact EFAX Drives to Know](https://cloudzat.com/wd-red-smr-model-list/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/)