[CentOS] help with hdparm

JohnS jses27 at gmail.com
Mon Dec 22 21:29:37 UTC 2008


On Mon, 2008-12-22 at 15:27 -0500, Jerry Geis wrote:
> I am running centos 5.2 i686.
> 
> The /boot/config indicates that VIA82CXXXX is built into the kernel.
> CONFIG_BLK_DEV_VIA82CXXX=y
> 
> my lspci -v gives
> 00:0f.0 IDE interface: VIA Technologies, Inc. CX700M2 IDE (prog-if 8a 
> [Master SecP PriP])
>        Subsystem: VIA Technologies, Inc. Unknown device 0581
>        Flags: bus master, medium devsel, latency 32
>        I/O ports at fc00 [size=16]
>        Capabilities: [b0] Power Management version 2
> 
> Which I think is the VIA part.
> 
> when I do "hdparm /dev/hdc" I get
> /dev/hdc:
> multcount    =  0 (off)
> IO_support   =  0 (default 16-bit)
> unmaskirq    =  0 (off)
> using_dma    =  0 (off)
> keepsettings =  0 (off)
> readonly     =  0 (off)
> readahead    = 256 (on)
> geometry     = 15733/16/63, sectors = 15858864, start = 0
> 
> when I do "hdparm -d1 /dev/dhc" I get
> 
> /dev/hdc:
> setting using_dma to 1 (on)
> HDIO_SET_DMA failed: Operation not permitted
> using_dma    =  0 (off)
> 
> 
> I get operation not permitted.
> How do I enable DMA mode for this device?
----\
You try setting hdparm -p4 /dev/hda   Just to see if you can set the PIO
Mode? How old is the Disk in question?

JohnStanley




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