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Hitachi Disk C7 Interface CRC Error Count: Causes and Solutions for Increasing Values

Brykiecik 6294 16
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Dlaczego rośnie licznik C7 (UltraDMA CRC Error Count) w dysku i co zrobić, żeby przestał przyrastać?

Najczęściej wzrost C7 oznacza błędy komunikacji między dyskiem a kontrolerem, zwykle przez problem z kablem SATA albo jego wpięciem, więc trzeba wymienić przewód i sprawdzić połączenie dysku [#16287543][#16287531] Jeśli po wymianie wartość przestaje rosnąć, to znaczy, że problem został opanowany; sam licznik się nie zeruje i nie spadnie do 0 [#16287679][#16288297][#16288301] Temperatura nie ma bezpośredniego wpływu na C7, choć warto nadal kontrolować temperatury dysku i całego zestawu [#16287564][#16288216]
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  • #1 16287526
    Brykiecik
    Level 11  
    Posts: 595
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    Hello, I have a problem with the disk. I mean, it works normally, but I'm worried about the increasing C7 parameter. What could be causing it to grow?

    I would add that when I got this computer, it was at the beginning 558 quite long, then it grew to 572, and continues to go up, it's already 581, and so every now and then.

    What to do?

    best regards
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  • #2 16287531
    Dra98
    Moderator of Computers service  
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    Brykiecik wrote:
    What to do?

    Replace cable, check HDD connection.
  • #3 16287542
    Brykiecik
    Level 11  
    Posts: 595
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    I can change. I have one more computer sat, but I'm not sure for it, because the whole tip moves and is loose (made in china).

    I still had a short sata cable from the xbox 360 that connected the drive with the console board. Will it be good for your computer?
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    #4 16287543
    kokapetyl
    Level 43  
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    Attribute 199 (C7)
    UltraDMA CRC Error Count
    Total number of CRC errors in UltraDMA mode. The RAW value of the attribute indicates the number of errors detected by the CRC when transmitting data in UltraDMA mode. The most common cause of errors is ribbon-to-cable data communication problems. This parameter does not decrease after the cable fault is corrected.
    Critical: No (The lower the value the better)

    I also see a problem with the disk temperature, it may indicate that all hardware has too high temperatures.
  • #5 16287547
    Brykiecik
    Level 11  
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    The temperature of the disk is around 47 ° C. This may affect the C7 parameter?
  • #6 16287564
    kokapetyl
    Level 43  
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    Temperature has no direct influence on parameter C7.
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  • #7 16287595
    Brykiecik
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    Ok, I replaced this cable with the one from this xbox. It looks a bit cheesy and I can't close the casing because it is very short.

    And one more question. If this C7 parameter does not increase, does it mean that communication errors are no longer present?

    :arrow: kokapetyl - you wrote that these are errors in UltraDMA mode, and this applies to the ATA interface (I think) and I have a sata disk and I do not know what to do because I do not write UltraDMA only interface crc error.

    Anything else I can do?
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  • #8 16287679
    kokapetyl
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    Brykiecik wrote:

    Anything else I can do?

    Watch this parameter for increasing. If it does not grow, it means that it is all right.
    And also these temperatures, something needs to be done.
  • #9 16287711
    Brykiecik
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    Ok, I have just bought a normal Sata cable so red and the disk is already in place. Now the cable sticks better to the disk and CD (it "sits" better).

    As for the temperature, I know why they are the way they are. Because the disc is on two pieces of cut sponge, as shown in the photo, but the disc is so located that the electronics has access to air.

    But the temperatures aren't the worst, are they? Am I wrong ?
  • #10 16287772
    kokapetyl
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    Brykiecik wrote:

    But the temperatures aren't the worst, are they?

    If it were so, I would not write anything about it.
    Now that you have the disk in place, download HWiNFO and run it.
    Then load the PC with some program or game. After fifteen minutes of load, read the hardware temperatures from HWiNFO (sensor tab), post these results on the forum so that all parameters are visible.
  • #11 16287777
    Brykiecik
    Level 11  
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    Ok, I'll test it on two world of tanks battles, about 25 minutes, and I'll post these photos.

    Well, and the disk has such a temperature because of these sponges because when it was screwed in (it was loud), the temperature did not exceed 42 * C.

    Added after 15 [minutes]:

    Ok, I did two votive battles on maximum graphic details with vertical sync at 75 fps and the result is like this: Hitachi Disk C7 Interface CRC Error Count: Causes and Solutions for Increasing Values
  • #12 16288216
    Kasek21
    Level 43  
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    Everything is OK - as far as temperatures are concerned.
  • #13 16288289
    Brykiecik
    Level 11  
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    I have one more question.
    Actually, why after eliminating the problem, why parameter C7 shows the value of 581? Why didn't it go down to 0?
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    #14 16288297
    Kasek21
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    Because this parameter is not reset!
  • Helpful post
    #15 16288301
    Dra98
    Moderator of Computers service  
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    The value will not reset itself, it is enough that it does not change - it does not increase.
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    #16 16288315
    kokapetyl
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    Brykiecik wrote:
    Actually, why after eliminating the problem, why parameter C7 shows the value of 581? Why didn't it go down to 0?

    The answer was already in # 4, colleague Kasek21 confirmed it.
  • #17 16288321
    Brykiecik
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    Ok I think everything is already explained, thanks for your help.
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Topic summary

✨ The discussion revolves around the increasing value of the C7 parameter (UltraDMA CRC Error Count) on a Hitachi disk, which indicates the number of CRC errors detected during data transmission. The user initially reported a rise from 558 to 581, expressing concern over the implications. Responses suggested checking and replacing the SATA cable, as communication errors are often caused by faulty connections. The user replaced the cable with one from an Xbox 360, which improved the connection. It was clarified that the C7 value does not decrease after errors are corrected, and as long as the value does not continue to rise, the situation is considered stable. Disk temperature was also discussed, with a noted temperature of around 47 °C, which was deemed acceptable. The consensus was that the C7 parameter's persistence at a high value is normal as it does not reset, and monitoring for further increases is essential.
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