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Western Digital Admits Flash Memory Changes Slowed Write Speed

Western Digital admits that one of the most popular NAND flash memory has replaced Solid State Drive (SSD). Performance was reportedly penalized up to 50%.

The WD Blue SN550 is one of Western Digital’s bestsellers. M.2 NVMe SSD model, but Tom’s hardware Confirmed report Replacing the NAND without notice will slow down the write speed of the drive and significantly reduce performance.

According to the analysis, the new lower NAND cannot fulfill the controller’s write request, and when the 12 GB SLC cache is exhausted, the performance drops from 610 MBps to 390 MBps in the 100 GB file copy test.

in the meantime, Tom’s hardware Keep in mind that this change shouldn’t affect the average user who can’t move enough data to run out of SSD’s SLC cache. This change affects users who move large files.

Victim of the tipping crisis?
In response to this article, Western Digital released a statement acknowledging that it actually replaced the NAND on the SSD.

“In June 2021, we replaced the NAND on the WD Blue SN550 NVMe SSD and updated the firmware,” the statement said.

According to the company, they noticed the change by updating the SSD product sheet. But from now on, the company is guaranteed to be internal. Changes to existing product components, especially those affecting previously published specifications, are better communicated by changing the product model number.

The company did not disclose why it replaced the NAND flash in the drive with a lower-performing alternative, Tom’s hardware. It suggests that this could be a lasting result. Semiconductor shortage has established itself in Western Digital’s supply chain.

Western Digital Admits Flash Memory Changes Slowed Write Speed