[Bug 199661] CAM status: command timeout regression

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=199661

            Bug ID: 199661
           Summary: CAM status: command timeout regression
           Product: Base System
           Version: 10.1-RELEASE
          Hardware: i386
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: arm
          Assignee: freebsd-arm at FreeBSD.org
          Reporter: stenio at csi-italia.eu

Hello,

for some reason my hardware (Fabiatech FX5621) doesn't work with FreeBSD 10.1
while it works perfectly with version 8.3. I tried to boot from a USB drive,
disabling from BIOS all IDE drives and using all hints commands I found with no
luck! This is what I tried:

    set hint.atapci.1.msi=0
    set hint.atapci.0.msi=0
    set hint.ata.1.mode="PIO4"
    set hint.ata.0.mode="PIO4"
    set hint.acpi.0.disabled=1
    set kern.cam.ada.write_cache=0


The boot loops with this error:

    (aprobe0:ata1:0:1:0): ATA_IDENTIFY. ACB: ec 00 00 00 00 40 00 00 00 00 00
00
    (aprobe0:ata1:0:1:0): CAM status: Command timeout
    (aprobe0:ata1:0:1:0): Retrying command
    run_interrupt_driven_hooks: still waiting after 60 seconds for xpt_config
    (aprobe0:ata1:0:1:0): ATA_IDENTIFY. ACB: ec 00 00 00 00 40 00 00 00 00 00
00
    (aprobe0:ata1:0:1:0): CAM status: Command timeout
    (aprobe0:ata1:0:1:0): Error 5, Retries exhausted
    (aprobe0:ata1:0:1:0): ATA_IDENTIFY. ACB: ec 00 00 00 00 40 00 00 00 00 00
00
    (aprobe0:ata1:0:1:0): CAM status: Command timeout
    (aprobe0:ata1:0:1:0): Retrying command
    run_interrupt_driven_hooks: still waiting after 120 seconds for xpt_config
    (aprobe0:ata1:0:1:0): ATA_IDENTIFY. ACB: ec 00 00 00 00 40 00 00 00 00 00
00
    (aprobe0:ata1:0:1:0): CAM status: Command timeout
    (aprobe0:ata1:0:1:0): Error 5, Retries exhausted


I found some FreeBSD users with similar errors:
http://freebsd.1045724.n5.nabble.com/no-subject-td5952628i20.html

Do you have any suggestions?

Thanks,
Stenio

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