Feedback Thread Firmware M0CR050 for the MX300

Community Manager

Feedback Thread Firmware M0CR050 for the MX300

Firmware revision M0CR050  for the Crucial MX300 (all form factors) is now available. This firmware update applies to the MX300 SSD (all form factors), and should not be applied to any other Crucial SSD model. Currently, the firmware update is available through the Crucial Storage Executive and through a manual boot file found here:


http://www.crucial.com/support/firmware.aspx

 

Release Date: 05/16/2017

 

  • Improved drive error handling
  • Minor Bug fixes
  • Improved general reliability and stability

Additional details can be found in the firmware guide.

YogiH, Crucial Moderator, US


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16 Replies
Kilobyte Kid

Re: Feedback Thread Firmware M0CR050 for the MX300

[ Edited ]

How do I install this on a Mac? Can I boot from the .iso image provided online- it looks to be windows specific. Update- I burned the ISO to a DVD and attempted to boot.  All I got was a blank screen with a blinking DOS cursor and no disk activity.  I'm on OS X 10.12.4. 

Kilobyte Kid

Re: Feedback Thread Firmware M0CR050 for the MX300

I have upgraded two MX300 to the new firmware an now I have a lot of trouble.

Need to downgrade to M0CR040. How to do this?

JEDEC Jedi

Re: Feedback Thread Firmware M0CR050 for the MX300

Downgrading firmware isn't typically a supported procedure.  What problems are you having with the new firmware?

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Bit Baby

Re: Feedback Thread Firmware M0CR050 for the MX300

[ Edited ]

I have the 525Gb M.2 variant of this drive and applied the new firmware yesterday.

Running disk benchmarks on it I've noticed the write speeds have slowed significantly.

I used to get the advertised speeds of approx. 515Mb/s, but now they peak at approx. 485Mb/s

Read speeds are still conistent at around 535Mb/s.

Anyone else noticed this at all?

 

Clipboard01.jpg

JEDEC Jedi

Re: Feedback Thread Firmware M0CR050 for the MX300

[ Edited ]

To be honest, I'd say such a small difference was within the margin of error of drive benchmarking.  Which is far, far from an exact science.  Especially if the drive is a system disk and is handling all the OS work and your background programs.

 

Also, are you comparing from immediately before the update, after the drive was used and dirtied up some?  Or from a benchmark you took when the drive was shiny and new?

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Did a user help you? Say thanks by giving Kudos!
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Still need help? Contact Crucial Customer Service
Remember to regularly backup your important data!

Bit Baby

Re: Feedback Thread Firmware M0CR050 for the MX300

It's a secondary drive that houses some Steam/Origin games, so it's not an OS drive.

I ran the benchmarks the other day and was still getting 515Mb/s writes.

It hasn't got near 500 since the firmware update.....

Kilobyte Kid

Re: Feedback Thread Firmware M0CR050 for the MX300

Both my drives that were upgraded and now not readable....

Kilobyte Kid

Re: Feedback Thread Firmware M0CR050 for the MX300

Ok update Disable hardware bitlocker on your drives before you do this update. I had to remove power from my pc before they  were useable again (all of them showed bitlocker raw) and on one that did not even work...becaue on that drive i tried to reformat it while it was in that state and it became write protected (less than 3 weeks old by the way) for a while. But after about an hour it started to work again. 

 

Also what does flexcap not work with hardware bitlocker?

Bit Baby

Re: Feedback Thread Firmware M0CR050 for the MX300

[ Edited ]

I have now the same problems with new firmware as with old and disabled momentum cache.
I have an old ASUS Pundit P4-P5N9300 and a MX300 SSD on Windows 10 home (latest updates)

When browsing with firefox after 10 minutes of using the system freezes.   
Is it really not possible to downgrade the firmware or is it possible to enable the momentum cache on an other way (registry)?