One possibility is that the drive does not support 16, look for
'MaxMultSect' in the output from 'hdparm -i /dev/hda'.
On Tue, 14 Nov 2000, Peter Kiem wrote:
> I got no replies at all so let's try this again...
>
> ----- Original Message -----
> From: Peter Kiem <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Saturday, November 11, 2000 11:42 PM
> Subject: hdparm problems
>
>
> > I've sucessfully used hdparm on 3 machines but on the next 2 struck some
> > SERIOUS problems.
> >
> > Every time I have tried "hdparm -m16 -c3 /dev/hda" with them the system
> has
> > worked perfectly and I get about double the I/O speed. On reboot however
> > the ext2 filesystem group descriptors corrupt and trash the / partition.
> > Screws up so bad the system is toast and has to be rebuilt.
> >
> >
> > The only thing I can see different about these machines are:
> >
> > 1) I think both are Cyrix processors, I know my workstations definately
> is.
> >
> > 2) For some reason the kernel is reporting the following about the drives:
> > Nov 4 13:59:09 raistlin kernel: PCI_IDE: unknown IDE controller on PCI
> bus
> > 00 device 58, VID=10b9, DID=5229
> > Nov 4 13:59:09 raistlin kernel: PCI_IDE: not 100% native mode: will probe
> > irqs later
> > Nov 4 13:59:09 raistlin kernel: PCI_IDE: simplex device: DMA disabled
> > Nov 4 13:59:09 raistlin kernel: ide0: PCI_IDE Bus-Master DMA disabled
> > (BIOS)
> > Nov 4 13:59:09 raistlin kernel: PCI_IDE: simplex device: DMA disabled
> > Nov 4 13:59:09 raistlin kernel: ide1: PCI_IDE Bus-Master DMA disabled
> > (BIOS)
> >
> > A few lines later it displays the IRQs for the drives.
> >
> >
> > Now it cannot be the drives as this machine above has the exact same
> drives
> > as another machine which DOES work.
> >
> > In the other machine (my workstation) the drive is less than 6 months old
> > although the machine is older than that. When I boot into Windows 98SE
> and
> > check the drives, Windows98 has managed to turn on DMA so why cannot Linux
> > do the same?
> >
> > Any ideas?
> >
> > Regards,
> > +-----------------------+---------------------------------+
> > | Peter Kiem | E-Mail : <[EMAIL PROTECTED]> |
> > | Zordah IT | Mobile : +61 0418 798 121 |
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>
>
>
>
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