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What can be the reason of limited to 30MB/s write speed to Crucial M4-CT128 SSD drive on Windows 10. Disk was before in different laptop with Win7 achieving higher write speeds. I noticed that after firmware upgrade, next test achieved higher speeds, but after system restart (I believe) write speeds came back to ~30MB/s

  • TRIM support enabled
  • interface SATA III
  • enabled AHCI
  • latest SSD Firmware
  • enabled write caching on the device
  • enough free space for test (about 99GB)
  • partition aligned

Benchmark: ATTO

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Benchmark: AS SSD

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Tomek
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    You don't mention if you are connecting the drive to a SATA III port or not. Windows 10 automatically enables TRIM when it detects a SSD, so I very much doubt, it has anything to do with TRIM not being enabled. In reality the drive is in general [slow](http://ssd.userbenchmark.com/Crucial-M4-128GB/Rating/1929) compared to other SSDs on the market. You are actually getting very close to the average write speed of that device. What tool did you use to benchmark this drive? – Ramhound Nov 18 '15 at 13:48
  • also post a picture of AS SSD Benchmark: http://alex-is.de/PHP/fusion/downloads.php?cat_id=4&download_id=9 – magicandre1981 Nov 18 '15 at 18:22
  • @Ramhound: please see completed details. – Tomek Nov 18 '15 at 23:51
  • @magicandre1981: included test from AS SSD, didn't have patience to wait for test to run completely – Tomek Nov 18 '15 at 23:52
  • is this the latest firmware for the M4 SSD? – magicandre1981 Nov 19 '15 at 05:33
  • @magicandre1981: yes 070H – Tomek Nov 19 '15 at 08:34
  • ok, try the suggestion of the answer and try to trigger a full TRIM. Alos try to run the Defrag UI and optimize the SSD: **"C:\Windows\system32\dfrgui.exe"** – magicandre1981 Nov 19 '15 at 19:09

1 Answers1

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You have to TRIM your drive, which evidently is in a full-used state (here you can find some related benchmark)

You can use trimcheck to be sure that TRIM is enabled, and follow these suggestions to trigger a full freespace TRIM.

Community
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shodanshok
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  • Yes TRIM is supported/enabled. – Tomek Nov 19 '15 at 00:00
  • Just to try I used app mentioned here http://superuser.com/questions/203956/how-to-manually-trim-an-ssd-in-windows-7 to force TRIM, it didn't help. – Tomek Nov 19 '15 at 00:11