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,
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