samsung 840 EVO - after update to magician 4.7 random read IOPS became extremely low

I have heard about 840 EVO performance drop issue with old data so I decided to update my firmware and Samsung Magician from 4.5 directly to 4.7. I was not seeing any noticeable performance drop, just maybe little down than usual.
First firmware update was not so simple. I received error message for failed update. I read about it and find a workaround on the net - change AHCI to IDE mode, update firmware, change back.
After that installed Magician 4.7 and did advanced performance optimization successfully.
AND THAT`s WHAT I GET :
READ Seq. - 537 Mb/s
WRITE Seq. 460MB/s
READ Random IOPS - 9400 !!!
WRITE Random IOPS - 58000

screenshot

Everything is little better than before the update, except the extremely low random read IOPS.
Why is that? Is this bug in Samsung software? I don`t notice any real world performance drop. I used also AS SSD benchmark and it look's OK. Also updated AMD SATA Driver but no change.

My system is Asrock fatal1ty 970 performance, AMD Phenom II x4 955, Win7 64bit.

Please give some advice or clue why is this happening?
3 answers Last reply
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  1. zedikus said:
    I have heard about 840 EVO performance drop issue with old data so I decided to update my firmware and Samsung Magician from 4.5 directly to 4.7. I was not seeing any noticeable performance drop, just maybe little down than usual.
    First firmware update was not so simple. I received error message for failed update. I read about it and find a workaround on the net - change AHCI to IDE mode, update firmware, change back.
    After that installed Magician 4.7 and did advanced performance optimization successfully.
    AND THAT`s WHAT I GET :
    READ Seq. - 537 Mb/s
    WRITE Seq. 460MB/s
    READ Random IOPS - 9400 !!!
    WRITE Random IOPS - 58000

    screenshot

    Everything is little better than before the update, except the extremely low random read IOPS.
    Why is that? Is this bug in Samsung software? I don`t notice any real world performance drop. I used also AS SSD benchmark and it look's OK. Also updated AMD SATA Driver but no change.

    My system is Asrock fatal1ty 970 performance, AMD Phenom II x4 955, Win7 64bit.

    Please give some advice or clue why is this happening?


    The bug only affects reading old data older than about 30 days. Its not noticeable in regular benchmarks like Magician. Do you have the new FW on the EVO?
  2. There should be an optimize option in magician it shuffles around old data and should bump up the numbers. Is just for epeen though access time is still <1ms that's all that matters.
  3. Palorim12 said:
    zedikus said:
    I have heard about 840 EVO performance drop issue with old data so I decided to update my firmware and Samsung Magician from 4.5 directly to 4.7. I was not seeing any noticeable performance drop, just maybe little down than usual.
    First firmware update was not so simple. I received error message for failed update. I read about it and find a workaround on the net - change AHCI to IDE mode, update firmware, change back.
    After that installed Magician 4.7 and did advanced performance optimization successfully.
    AND THAT`s WHAT I GET :
    READ Seq. - 537 Mb/s
    WRITE Seq. 460MB/s
    READ Random IOPS - 9400 !!!
    WRITE Random IOPS - 58000

    screenshot

    Everything is little better than before the update, except the extremely low random read IOPS.
    Why is that? Is this bug in Samsung software? I don`t notice any real world performance drop. I used also AS SSD benchmark and it look's OK. Also updated AMD SATA Driver but no change.

    My system is Asrock fatal1ty 970 performance, AMD Phenom II x4 955, Win7 64bit.

    Please give some advice or clue why is this happening?


    The bug only affects reading old data older than about 30 days. Its not noticeable in regular benchmarks like Magician. Do you have the new FW on the EVO?



    Yes correct!!! Wondering why you getting this low figure!!!!
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