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Western Digital is investigating reports of elevated failures in certain older WD Blue and WD Red hard-drive families that use shingled magnetic recording (SMR). The reports do not yet establish that every SMR drive is defective, that SMR itself causes physical failure, or that Western Digital has issued a recall. As of August 18, 2026, the available sources do not show a public final investigation report, universal failure-rate figure, or confirmed corrective firmware release.
What is actually being investigated?
German data-recovery company 030 Datenrettung Berlin reported unusually high failure rates in several older Western Digital drive families. The models discussed include WD Blue and WD Red drives using model-number families such as WDx0EZAZ, WDx0EDAZ, and WDx0EFAX, generally covering capacities from 2 TB through 6 TB. 030 Datenrettung’s report describes a suspected firmware or platform-related problem, while secondary reporting says Western Digital opened an engineering investigation.
Those facts need to be separated from claims that have not been proven:
- Reported: A recovery specialist has seen an unusual pattern of failures in particular drive families.
- Reported: Western Digital is investigating the scope and technical details.
- Not established: A population-wide failure rate for all affected models.
- Not established: That SMR alone is the cause.
- Not established: A recall, universal defect declaration, warranty extension, or public firmware fix.
In other words, “Western Digital is investigating reports of elevated failures in specific older SMR-based drive families” is defensible. “Western Digital admitted that all SMR drives are defective” is not.
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Which WD drives are reportedly involved?
Check the exact model printed on the drive or reported by the operating system. “WD Blue,” “WD Red,” or “4 TB WD drive” is not specific enough. Suffixes such as EZAZ, EDAZ, EFAX, and EZAX can indicate different products and recording technologies.
| Family | Models discussed in reporting | Capacities | What the evidence shows |
|---|---|---|---|
| WD Blue | WD20EZAZ, WD30EZAZ, WD40EZAZ, WD60EZAZ | 2 TB, 3 TB, 4 TB, 6 TB | Western Digital identifies several EZAZ models as SMR; 030 Datenrettung discusses EZAZ and EDAZ families. |
| WD Blue | WD20EDAZ, WD40EDAZ, WD60EDAZ | 2 TB, 4 TB, 6 TB | Listed by 030 Datenrettung in its reported VeniceR family; verify the exact revision before treating a drive as affected. |
| WD Red | WD20EFAX, WD30EFAX, WD40EFAX, WD60EFAX | 2 TB, 3 TB, 4 TB, 6 TB | Officially identified by WD as SMR models and included in the earlier U.S. settlement class. |
| WD Purple | Various models | Multiple capacities | Related models are mentioned in the reporting, but the applicability of the reported issue is disputed and should not be generalized. |
Western Digital’s current WD Blue product page lists WD20EZBX, WD30EZAZ, WD40EZAZ, and WD60EZAZ as SMR, while WD30EZAX, WD40EZAX, WD60EZAX and other models are listed as CMR. For example, WD40EZAZ and WD40EZAX are both 4 TB products but are not equivalent.
OEM, external-enclosure, and white-label drives can have different labels from the product originally sold. Inspect the actual disk’s model, serial number, and firmware revision. A family match should trigger a backup and closer inspection; it is not proof that a particular unit will fail.
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Shingled magnetic recording overlaps adjacent magnetic tracks to fit more data onto a platter. Because tracks overlap, rewriting one area may require the drive to read and rewrite neighboring tracks. That can produce lower sustained-write performance, long pauses, write amplification, and severe slowdowns during workloads involving frequent small or random writes.
There are three broad SMR implementations:
- Drive-managed SMR (DM-SMR): The drive hides its shingled layout from the operating system.
- Host-aware SMR (HA-SMR): The host can receive information about the drive’s behavior.
- Host-managed SMR (HM-SMR): The host must follow zone-management rules.
SMR is not automatically a mechanical failure mechanism. It can be suitable for some mostly-read or sequential-storage workloads. The problem is that DM-SMR can behave poorly in demanding NAS, RAID, and ZFS environments. TrueNAS documentation warns that DM-SMR and HA-SMR can cause poor ZFS performance, especially during resilvering, while HM-SMR is not supported by ZFS.
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That known workload trade-off is different from the current failure reports. The available evidence does not prove that overlapping tracks themselves caused the reported physical, firmware, or data-access failures.
What failures are being reported?
The reported symptoms include:
- The drive disappears from BIOS or the operating system.
- Repeated spin-up and spin-down cycles.
- Clicking, beeping, or recalibration sounds.
- Severe slowdowns, pauses, or apparent freezes.
- SMART errors or rapidly increasing bad-sector counts.
- Failure to read the disk even with recovery software.
- RAID rebuilds or ZFS resilvers that become extremely slow or fail.
These symptoms are not specific to SMR or to the reported WD platform. Clicking can indicate head, motor, media, power, or firmware trouble. A failed resilver does not by itself prove that the drive has the suspected issue, and user anecdotes are not a representative failure-rate study.
The suspected technical mechanism
030 Datenrettung describes a suspected firmware or platform problem associated with a group it calls the “VeniceR” family. The report links related platforms to WD Blue, WD Red, WD Purple, and white-label variants. This remains a reported hypothesis, not a confirmed root-cause analysis from Western Digital.
Several explanations remain possible:
- A firmware defect or firmware-induced translator problem.
- Head-stack or platter-media degradation.
- SMR write-management behavior exposed by particular workloads.
- Age-related failures concentrated in one production platform.
- NAS vibration, heat, power, or workload conditions.
- A combination of firmware and mechanical weaknesses.
- Sampling bias because recovery companies disproportionately see failed drives.
The evidence supplied so far does not provide a reliable causal percentage for any of these explanations.
How this relates to the 2020 SMR controversy
The current investigation follows an earlier dispute over how SMR was disclosed and marketed. In April 2020, Western Digital published an SMR SKU list identifying selected WD Blue, WD Red, and WD Black models.
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The list included WD20EZAZ and WD60EZAZ among 3.5-inch WD Blue models; WD10SPZX and WD20SPZX among 2.5-inch WD Blue models; WD20EFAX, WD30EFAX, WD40EFAX, and WD60EFAX among WD Red models; and WD10SPSX among WD Black models. It stated that other capacity points used CMR.
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A U.S. complaint filed on June 16, 2020 alleged inadequate disclosure of SMR in certain WD Blue and WD Black products. A 2021 settlement notice covered U.S. purchasers of the four WD Red SMR models listed above and described a $2.7 million settlement fund. That settlement concerned alleged disclosure, performance, and suitability issues. It should not be described as a court finding that every drive was physically defective.
The two stories therefore have different scopes:
- Earlier controversy: whether SMR was adequately disclosed and suitable for some NAS workloads.
- Current investigation: reports of unusually high failures in particular drive families.
- Unresolved question: whether the reported failures arise from SMR, a firmware or platform issue, normal aging, operating conditions, or several factors together.
What owners should do now
If the drive still works normally
- Back up irreplaceable data immediately. Keep at least one independent copy; RAID is redundancy, not backup.
- Record the exact model, serial number, firmware version, capacity, and manufacturing information.
- Review SMART data without running a write-heavy test or repair operation.
- Avoid destructive surface scans, secure erases, reformatting, or RAID rebuilds until important data is protected.
- Plan a proactive replacement if the drive is the only copy of important data or is used in a high-write NAS workload.
SMART is useful but not definitive. A drive can report “good” SMART status while suffering intermittent firmware, translator, head, or mechanical problems.
If it is slow or intermittently readable
- Stop unnecessary writes.
- Copy the most important files first.
- Use a read-focused recovery or imaging workflow.
- If the disk repeatedly disconnects, clicks, or fails to identify, stop repeatedly power-cycling it.
- Do not open the drive or casually swap its PCB or heads. Recovery hardware and compatible donor parts may be required.
If it has already failed
If the data matters, prioritize recovery over warranty replacement. Western Digital explains that data recovery should take place before sending a drive for warranty replacement and says it is not responsible for data loss associated with recovery services. See WD’s warranty-replacement guidance and professional recovery information.
A warranty replacement gives you another drive; it does not restore the files on the original. Sending the only copy to a retailer or manufacturer before securing the data can permanently remove your best recovery opportunity.
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Should you replace an affected drive?
Replacement is the sensible choice when the drive contains the only copy of important data, shows worsening symptoms, or operates in a demanding NAS, RAID, or ZFS environment. A stable SMR disk used for an independently backed-up, mostly-read desktop archive is a lower-risk case, but it should not be mistaken for a guarantee.
For replacements, prefer a clearly documented CMR model with a workload rating appropriate to the system. CMR is particularly important for:
- TrueNAS and ZFS systems.
- RAID arrays and frequent resilvering.
- Databases, virtual machines, torrents, and small-file workloads.
- Multi-user NAS storage.
- Surveillance or other sustained-write workloads.
WD Red Plus is positioned as a CMR-oriented NAS option for smaller systems, while WD Red Pro targets more demanding NAS deployments. Ultrastar and comparable enterprise nearline drives suit higher-duty-cycle systems but may be louder, more expensive, and more power-hungry. WD Blue is desktop-oriented and should not automatically be treated as a 24/7 NAS drive.
Seagate IronWolf, Seagate Exos, and Toshiba N300 are possible alternatives, but verify the exact model’s recording technology, workload rating, warranty, vibration tolerance, and return policy. No brand or recording technology guarantees reliability. The important combination is an appropriate, documented drive and a real backup strategy.
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The available material does not establish the number of drives examined, the denominator needed to calculate a representative failure rate, the affected firmware revisions, the precise root cause, or whether all listed platform variants behave the same way. It also does not establish a public recall, warranty extension, final engineering report, or confirmed firmware remedy as of August 18, 2026.
Until those facts are published, model-specific caution is more appropriate than a blanket claim. Owners of the reported EZAZ, EDAZ, or EFAX families should secure their data and assess replacement options, especially in demanding NAS environments, but should not assume that every matching drive is guaranteed to fail.
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