I don't think hdparm works with SCSI either.

-steve

Milan Babuskov wrote:

> Rick Debay wrote:
>
>> We're moving off of RedHat 8 on ext3 on to Suse 10. On the new system
>> we're experiencing poor response in terminal sessions and at the
>> keyboard when restoring a database. Our first guess is that it's the
>> Reiser file system. Before we start building another test box, I'd like
>> to hear anyone's experiences with the Reiser FS or Suse when running
>> Firebird.
>>
>
> I'm using both Reiser and ext3 on various instalations in past 3 years.
> ReiserFS version 3.6 seems to work quite fine, we haven't had any
> problems as long as hardware is functional. In the last year I prefer it
> to ext3 as it formats much faster and has faster recovery time in case
> of crash/power failure/etc.
>
> The problems you describe could be SuSE specific, or even machine
> specific. It sounds like DMA is off for the disk. Assuming that disk is
> /dev/hda, you can check it like this:
>
> # grep dma /proc/ide/hda/settings
> using_dma 1 0 1 rw
>
> The second and third number should be 0 and 1 (on all non-SATA systems),
> while first number should be 1. If it is zero, it means DMA is off. You
> can activate it with:
>
> # hdparm -d1 /dev/hda
>
>
> This will NOT work on SATA disks! If you have SATA disk and controller,
> you need to make sure that you're running kernel with SATA support in
> it. For some configurations it has to be compiled in the kernel itself,
> and not left out as a loadable module, as you can't toggle between SATA
> and PATA mode at runtime.
>
> I'm not sure how SuSE does it, but other distros I use have some way to
> install SATA kernel. You should check the SuSE docs, or your vendor if
> you are paying support.
>
> If you do have SATA kernel, make sure that your PC's motherboard setting
> is properly set to SATA only mode, as many kernel drivers don't support
> mixed mode, or work poorly with it.
>
>