What WD and HGST hard drives are SMR?

May 4th 2020 in HDD
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Shingled Magnetic Recording (SMR) technology helps hard drive manufacturers to produce HDDs with larger capacity. But it is not recommended to use SMR drives for applications with significant load (for example in NAS boxes or for 24x7 use). If you ever questioned whether your hard drive uses SMR, then this guide would help you.


How to use this guide.


Since WD Corporation purchased HGST, all the hard drive models produced by both companies are intertwined in company portfolios. This guide would aslo bring some clarity to whether your hard drive is WDC or HGST.
To use this guide first you would have to convert your drive model name.
There are two model naming conventions in this guide.
WDC naming convention: all model names in this naming convention start with letters "WD", WDC full model name would aslo have a dash, for example WD60EFRX-68L0BN1.
HGST naming convention: all model names in this naming convention start with letters "W" or "H", and there is no dash in the model name, for example HUH728080ALE601, WUH721010AL42L4.
You would notice that some characters in the model names in the tables below are replaced with "?". "?" - means any character.

If your drive follows WDC model naming convention, then first you would have to take all the letters and numbers after the dash, for example WD40EFRX-68L0BN1 would transform to 68L0BN1. Then modify this short model name, replacing first two characters and the very last one with "?", for example 68L0BN1 would become ??L0BN?.
Use this string "??L0BN?" to search for model name in the tables below: can be found as WD60EFRX-??L0BN?. Any capacity drive with the name "??L0BN?" is from the same family and all the fields from the found table row are valid for it, meaning model WD60EFRX-68L0BN1(6TB) and WD40EFRX-00L0BN0(4TB) are from the same family.

If your drive follows HGST model naming convention, then you would have to replace one or two capacity encoding numbers and the very last number in the model name with "?". For example HUH728060ALE601 would become HUH7280??ALE60?, and HUS726T6TALE6L1 transforms to HUS726T?TALE6L?.
Use this modified string, for example "HUH7280??ALE60?" to search for model name in the tables below. Any capacity drive is from the same family as the found model name and all the fields from the found table row are valid for it, meaning HUH728060ALE601(6TB) and HUH728080ALE600(8TB) are from the same family.


Model Guide

Abbreviations used in the guide:
He - Helium-filled drive.
CMR - Conventional Magnetic Recording (means not SMR).
PMR - Perpendicular Magnetic Recording (both CMR and SMR type drives use it).
DM-SMR - Device Managed Shingled Magnetic Recording.
HM-SMR - Host Managed Shingled Magnetic Recording.
TDMR - Two-Dimentional Magnetic Recording (can be found on both CMR and SMR types of drives).

If your drive is not found in this guide, please send me pictures from both, the label and the PCB sides of the HDD (or full model and serial number if you cannot take the pictures) and I'll try to add your drive to the guide.
Please don't send me the USB model name aka enclosure name, I will not be able to tell anything by it.

CMR 3.5" drives

Model Name Interface Type Manufacturer
Any model before year 2018 SATA, SAS CMR (PMR) WDC
Any model before year 2019 SATA, SAS CMR (PMR) HGST
WD40EZRZ-??GXCB?
WD40EFRX-??N32N?
WD40EMRX-??UZ0N?
SATA CMR (PMR) WDC
WD60EFRX-??L0BN?
WD60EFRX-??MYMN?
WD60EZRZ-??GZ5B?
WD60EZRZ-??RWYB?
WD60EZRX-??MVLB?
WD60PURX-??LZMY??
SATA CMR (PMR) WDC
WD6005FRPZ-??S9PB? SATA CMR (PMR) WDC
WD60PURZ-??AJFX? SATA CMR (PMR) WDC
WD4002FYYZ-??B7CB?
WD6002FFWX-??TZ4N?
WD6002FRYZ-??WD5B?
WD6002FZWX-??GBGB?
HUS7260??ALE61?
SATA CMR (PMR) HGST
WD6003FFBX-??MU3N?
HUS726T?TALE6L?
SATA CMR (PMR) HGST
HUS7260??ALA64? SATA CMR (PMR, He) HGST
HUS7260??ALS64? SATA CMR (PMR, He) HGST
WD8002FRYZ-??FF2B?
WD80EFZX-??UW8N?
WD80EZZX-??CSGA?
WD80PURZ-??YNPY?
HUH7280??ALE60?
HUH7280??ALN60?
SATA CMR (PMR, He) HGST
WD8003FFBX-??B9AN?
WD80EFAX-??KNBN?
SATA CMR (PMR) HGST
WD100EFAX-??LHPN?
WD100EMAZ-??WJTA?
WD100EZAZ-??TDBA?
HUH7210??ALE60?
SATA CMR (PMR, He) HGST
WUH7210??AL42L?
WUH7210??AL52?
SAS CMR (PMR, He) HGST
WUH7210??ALE6L?
WUH7210??ALN6L?
SATA CMR (PMR, He) HGST
WD120EFAX-??UNTN? SATA CMR (PMR, He) HGST
WD120EMFZ-??A6JA?
WD140EMFZ-??A0WA?
SATA CMR (PMR, He) HGST
WUH7214??AL42L?
WUH7214??AL52?
SAS CMR (PMR with TDMR, He) HGST
WUH7214??ALE6L?
WUH7214??ALN6L?
SATA CMR (PMR with TDMR, He) HGST

CMR 2.5" drives

Model Name Interface Type Manufacturer
Any model before year 2016 SATA, USB CMR (PMR) WDC, HGST

SMR 3.5" drives

Model Name Interface Type Manufacturer
WD20EZAZ-??GGJB?
WD20EZAZ-??WGYX?
SATA DM-SMR (PMR) WDC
WD60EDAZ-??BMZB?
WD60EFAX-??SHWN?
WD60EMAZ-??TKPB?
WD60EZAZ-??ZGHB?
SATA DM-SMR (PMR) WDC
WD60EFAX-??JH4N? SATA DM-SMR (PMR) WDC
HSH7214??AL42M?
HSH7214??AL52M?
SAS HM-SMR (PMR, He) HGST
HSH7214??ALE6M?
HSH7214??ALN6M?
SATA HM-SMR (PMR, He) HGST

SMR 2.5" drives

Model Name Interface Type Manufacturer
WD9000LPZX-??HKTX? SATA DM-SMR (PMR) WDC
WD10SPSX-??A6WT?
WD10SPWX-??A4RT?
SATA DM-SMR (PMR) WDC
WD10SPZX-??Z10T?
WD10SPZX-??EW0T?
HTS5410??B7E610
SATA DM-SMR (PMR) WDC
WD10SDZW-??UMGS?
WD10SMZM-??WKCS?
WD10SMZW-??Y0TS?
USB DM-SMR (PMR) WDC
WD20SPZX-??CRAT?
WD20SPZX-??UA7T?
SATA DM-SMR (PMR) WDC
WD20SDRW-??VUUS?
WD20SDZM-??TM5S?
WD20SDZW-??Z3CS?
WD20SMZM-??H3FS?
WD20SMZW-??YFCS?
USB DM-SMR (PMR) WDC
WD40NPZZ-??PDPT? SATA DM-SMR (PMR) WDC
WD40NPZZ-??JHGT?
WD40NMZW-??GX6S?
USB DM-SMR (PMR) WDC
WD50NDZW-??MR8S?
WD50NMZW-??LG6S?
USB DM-SMR (PMR) WDC


Author: Artem Rubtsov

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