WD ignores the problems caused by its SMR drives

WD ignores the problems caused by its SMR drives

As we have previously explained, hard drives that use SMR technology have a higher data density per plate because tracks are written overlapping each other, which in turn allows the manufacturer save production costs. However, this causes a lower performance and if they are used in RAID systems they give parity problems when trying to do a restoration, causing data loss.

What technology does each WD hard drive use?

This is the list as published by the company:

So, now we know that it is not only the WD Red drives that have SMR technology, but there are also many WD Blue and even the 2.5 TB 1TB WD Black are also SMR drives.

If you have an SMR disk you must let it "rest"

As WD has posted on its blog, its WD Red hard drives are designed for home users and SMBs, especially for NAS with 1 to 8 bays, and deliver excellent performance that has been tested and corroborated by numerous NAS manufacturers. These disks (be they SMR or CMR) are prepared for workloads of up to 180TB per year and they indicate so in their technical specifications.

The fact is that due to how SMR technology works, the data is written to free sectors of the disk and later, when the disk is at rest, the DMSMR is dedicated to putting the data in its place. According to the manufacturer, if we overload the disk and don't give the DMSMR time to do its job, that's when the performance dips occur, but they say this is the user's fault because they will be using the disk above their specification.

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<p>In other words, if at any given moment you subject the hard disk to a lot of load and you notice that its performance decreases <strong>it is your fault because you are not using it as designed</strong>. Of course, what they don't say is that <strong>if the user had known if the disk was CMR or SMR in the first instance</strong> Maybe he hadn't bought that model precisely to avoid these problems.</p>
<p>Also, as we mentioned earlier, the manufacturer has had the audacity to say that if we do not want to have these problems we should buy higher-end hard drives, which are much more expensive. What we needed to hear, aren't these discs supposed to be designed for NAS?</p>
<h2>WD does not mention SMR disk problems in RAID</h2>
<p>How large is this workload that would overload the disks? For example, when a disk breaks in a RAID environment and you have to rebuild it with a new one, since while the restoration lasts you will have the disks working at their maximum. And precisely this is another of the problems that SMR disks give, which <strong>when you try to restore a RAID they give data parity error</strong> and on many occasions the restoration fails, taking place <strong>data loss</strong>.</p>
<p>WD Reds are supposed to be hard drives designed for NAS, and this is stated by the manufacturer. And really, who has a NAS with a stack of disks and does not have it in RAID? Almost nobody. But WD has made no mention of this in its post, though all the same seeing how it got rid of performance issues blaming users for "misuse" and urging them to buy higher-end discs, neither did we strange.</p>
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Definitely: WD has tricked users selling slower SMR discs and giving problems without warning, and making more profit with it. When they have been discovered they have published the complete list when they are under pressure, but saying that the discs are designed in a certain way and that it is the fault of the user when they give problems because they do not use them properly. And finally, urging users (of course) to buy better and more expensive records.

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For all these reasons, at this time we can only recommend that you do not buy WD hard drives until the company is not responsible for their actions and acts in favor of the users and not in their own interests.


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