Ide=nodma is "loosing too many ticks"

From: Mark (msalists_at_gmx.net)
Date: 03/31/05

  • Next message: kevin.kempter_at_dataintellect.com: "Help with Printing" 
    To: "'For users of Fedora Core releases'" <fedora-list@redhat.com>
Date: Thu, 31 Mar 2005 10:31:36 -0800

    I got the following problem after my FC3 install:

    Losing too many ticks!
    TSC cannot be used as a timesource.
    Possible reasons for this are:
      You're running with Speedstep,
      You don't have DMA enabled for your hard disk (see hdparm),
      Incorrect TSC synchronization on an SMP system (see dmesg).
    Falling back to a sane timesource now.

    I have ide=nodma in the boot parameters, since I was not able to complete the install with that parameter.
    If I try to take this parameter out of the grub.conf, I get the below and the machine does not boot:

    hdc: cdrom_pc_intr: The drive appears confused (ireason 0x02)
    ide-cd: cmd 0x1e timed out
    hdc: lost interupt

    I also tried "ide0=dma ide1=nodma" with the same problem (CDROMs are hdc and hdd on ide1)
    Then I tried "ide=nodma ide0=dma". It boots, but I dont know if it fixes the original problem...

    Should I leave "ide=nodma" in and live with the first warning? Is this just a warning that can be ignored or is there something that
    could actually go wrong if I use this as a production server?

    I am surprised about this whole "ide=nodma" thing anyway. It seems that the only way to get Fedora installed on any of my machines
    is to use "ide=nodma"as boot params. Sometimes I even seem to need "allowcddma". My machines are by no means special, just standard
    IDE controllers with a bunch of IDE HDs and IDE cdrom... What is the best practise for this case?

    Thanks,

    MARK 

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