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Devices => PC's and Other Hardware => Topic started by: mwillems on September 20, 2014, 05:38:07 pm

Title: Samsung 840 Evo Firmware Bug Affecting Read Speed
Post by: mwillems on September 20, 2014, 05:38:07 pm

I know there are a lot of Samsung 840 Evo users here (including myself), so I thought this might be of general interest:
http://www.anandtech.com/show/8550/samsung-acknowledges-the-ssd-840-evo-read-performance-bug-fix-is-on-the-way

Bottom line keep your eyes peeled for a firmware update sometime soon.

Title: Re: Samsung 840 Evo Firmware Bug Affecting Read Speed
Post by: JimH on September 20, 2014, 05:42:17 pm

Thanks for posting that.

Title: Re: Samsung 840 Evo Firmware Bug Affecting Read Speed
Post by: mwillems on October 15, 2014, 08:10:33 pm

Samsung has now released a firmware fix, this article has some good data on what was fixed, and the bottom of the article has a link to the update tool: http://techreport.com/review/27212/samsung-840-evo-update-fixes-slow-reads-with-old-data

Title: Re: Samsung 840 Evo Firmware Bug Affecting Read Speed
Post by: astromo on October 16, 2014, 12:22:26 am

Thanks for the tip.

My Evo isn't old enough to show the issue however with this info, I can cut it off at the pass.

Title: Re: Samsung 840 Evo Firmware Bug Affecting Read Speed
Post by: mwillems on October 16, 2014, 07:31:21 am

Quote from: astromo on October 16, 2014, 12:22:26 am

Thanks for the tip.

My Evo isn't old enough to show the issue however with this info, I can cut it off at the pass.

I got slow downs within three or four weeks, so yours must be very new indeed  ;D (congrats on the new drive!)

Title: Re: Samsung 840 Evo Firmware Bug Affecting Read Speed
Post by: Hendrik on October 16, 2014, 07:53:37 am

I didn't actually go and measure the speeds after nearly half a year of 24/7 operation, but the tool was applied, and everything is probably good now =)

Title: Re: Samsung 840 Evo Firmware Bug Affecting Read Speed
Post by: mwillems on October 16, 2014, 08:28:09 am

Quote from: Hendrik on October 16, 2014, 07:53:37 am

I didn't actually go and measure the speeds after nearly half a year of 24/7 operation, but the tool was applied, and everything is probably good now =)

I didn't measure using speedtach or anything, but I'd notice that when I'd do read-intensive activities that Hardware Sentinel was reporting read speeds in the low 100's of MB/s, which was baffling to me before the news came out.  Sometimes reads would move at 400 MB/s, sometimes at 100, but usually in a sort of spike pattern between the two, and there seemed to be no pattern to it.  That's why I was excited when someone cracked the code on this and samsung agreed to fix it.

If I wanted 100MB/s access times, I wouldn't have gotten an SSD to begin with  ;D

Title: Re: Samsung 840 Evo Firmware Bug Affecting Read Speed
Post by: Arindelle on October 16, 2014, 01:57:17 pm

Hi does this problem effect the Pro version or just the evo?.

A friend of mine in making an archive of a 4 tb drive has the evo and uses the same external dock via USB 3 I was copying at 3 times the speed from the same make and size drive - this would explain everything for him.

Thanks

Title: Re: Samsung 840 Evo Firmware Bug Affecting Read Speed
Post by: mwillems on October 16, 2014, 02:14:09 pm

The 840 Pro is not affected, but the vanilla 840 may be.

Title: Re: Samsung 840 Evo Firmware Bug Affecting Read Speed
Post by: Arindelle on October 17, 2014, 05:07:50 am

thanks mw