r/Crucial•
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Crucial MX wearing at TWICE the specified rate

I have a Windows 10 system. In January 2024 I replaced my system drive with a Crucial MX500 500GB SSD. However my SMART monitoring is showing that in only 3 months it has wear levelling of 7% and I have been in discussions with Crucial about whether this is reasonable or not.

The formal specification for this drive (taken from the PDF they sent me) is 180TB (equivalent to 98GB per day for 5 years).

The Crucial Storage Executive SMART measurements (updated to current) show 13130827329 writes of 512 byte sectors = 6,722,983,592,448 bytes or 6.7TB. 6.7TB as a % of 180TB is 3.73% but the reported wear is now 7%. In other words my drive is wearing at TWICE THE SPECIFIED RATE.

There is nothing abnormal about my laptop except that data is held on other drives and NOT held on the C: drive. In all other respects it is a reasonably high specification (Intel I7 but 4th Gen) but otherwise normal Windows 10 laptop. I don't run crypto miners or anything.

Crucial are claiming that my system must be creating writes that are not being measured by their firmware and are disclaiming any responsibility - I have no idea whether this is actually technically possible to write data without it counting those writes, but if so I have no idea how, nor do I understand why their firmware would fail to count such writes and they are definitely not explaining how this could be despite my explicitly asking.

(Generally speaking "blame the customer" is IMO neither good customer service nor a good look for any company.)

I have therefore decided to describe this here and ask whether:

  1. Anyone has any idea whether there could be something on my system that is causing writes that are not being counted by the SSD firmware;
  2. Is anyone else experiencing faster than expected wear levelling that they have already spotted;
  3. Would others who have Crucial MX drives be willing to install the Crucial Storage Executive (to have a consistent way of collecting SMART data) and to log the key details using a Google form (details to follow).

The Google form requests your email address but it is not validated. This is simply so I can contact you if I have follow-up questions or want to give you feedback. Feel free to use a@b.com if you wish to be anonymous.

I will collate the data in a Google sheet and provide feedback here (without email addresses) once I have enough data points.

Posted Apr 22, 2024, 1:36 PM UTC

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