ATA Error

  • Ok so im new to the forums but i've used pfSense before. even when i do a liveCD boot i keep getting a error the looks like this.

    ahcico0: Timeout on slot 0 port 0
    ahcich0: is 00000002 cs 00000000 ss 00000000 rs 00000001 tfd 150 serr 00000000 cmd 00046017
    (aprobe0:ahcich0:0:0:0): ATA_IDENTIFY. ACB: ec 00 00 00 00 40 00 00 00 00 00 00
    (aprobe0:ahcich0:0:0:0): CAM Status: Command timeout
    (aprobe0:ahcich0:0:0:0): Retrying Command
    (aprobe0:ahcich0:0:0:0): Error 5, Retries exhausted

    I dont know what to do i do know the is a small Windows Server System Reserve partion on the HDD and i cant seem to remove it. but it like 80MB and the drive is a 20 GB Drive. so i dont know what to do..

  • A 20 GB disc? It would be very old. Are you sure it supports AHCI respectively NCQ?
    Try to turn off AHCI in BIOS before booting pfSense. Maybe also a BIOS update could help.

  • funny i have turned of AHCI and that made it worse… then it didnt even get past the Boot loader.

  • Netgate Administrator

    Try setting a different disk access mode in the BIOS like LBA or CHS.

    What hardware are you running on?


  • Netgate Administrator

    Try interrupting the boot loader to get to the OK prompt and do:

    set hint.ahci.0.msi="0"

    As refrerrenced here:


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