EventID521 The miniport logged an event

  1. Posts : 683
    Windows 10 x64

    EventID521 The miniport logged an event

    I've posted about this error before.
    There are tens of thousands of these error in the event log.
    When viewing the event log I need to scroll almost endlessly to hit on an entry not reading the above.

    I've been able to find out what possibly might be the case.

    It refers to PortNumber 0, Bus 0, Target 0, Lun 0 which involves the CD-ROM player, BC-12D2HT.

    Also I found an article on the Microsoft site about "Making SCSI Port Miniport Drivers Work with Storport"


    I 've no idea what this means and whether there is indeed some relation between this and the errors in the event log and IF... there is, IF, how to solve it.

    Suggestions are welcome!

    Thanks.EventID521 The miniport logged an event-snagit-02072020-100916.png

    The miniport logged an event.

    MiniportName storahci
    MiniportEventId 26
    MiniportEventDescription AhciPortErrorRecovery
    PortNumber 0
    Bus 0
    Target 0
    LUN 0
    Parameter1Name StateFlags
    Parameter1Value 1106433
    Parameter2Name PortErrRecovery
    Parameter2Value 41652
    Parameter3Name StartState
    Parameter3Value 1099511627798
    Parameter4Name PortReset
    Parameter4Value 0
    Parameter5Name RunningStrtFail
    Parameter5Value 0
    Parameter6Name NonQ'dErrRecov
    Parameter6Value 41651
    Parameter7Name NCQError|NCQErrorComplete
    Parameter7Value 0
    Parameter8Name BusChange
    Parameter8Value 0

    Device ID SCSI\CDROM&VEN_ASUS&PROD_BC-12D2HT\4&DC154C5&0&000000
    Status 0x0180200a Started
    Problem 0x00000000 (0)
    Service cdrom
    Capabilities 0x00000060
    Config Flags 0x00000000
    Class CDROM
    Manufacturer (Standard CD-ROM drives)
    Hardware IDs SCSI\CdRomASUS____BC-12D2HT_______1.00
    Compatible IDs SCSI\CdRom
    Class GUID {4d36e965-e325-11ce-bfc1-08002be10318}
    Location Bus Number 0, Target Id 0, LUN 0
      My Computer

  2. Posts : 683
    Windows 10 x64
    Thread Starter

    How to stop the many useless eventID521 errors showing up in the event log

    Matter solved as follows:
    Launch EventViewergo to Applications and Services Logs > Microsoft > Windows > StorPort
    r-click Microsoft-Windows-Storage-Storport/Operational > select properties
    uncheck “Enable logging” and click op [Apply]

    Attachment 291377
    Attached Thumbnails Attached Thumbnails EventID521 The miniport logged an event-snagit-06082020-093133.png  
      My Computer


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