Can any one please help me..

Can any one please help me..

[Santosh Kumar Cheekatmalla]

Hi Everyone,

Can you please help me enable DMA on my machine.

I am new to linux , so can you be little elaborate in your reply
thanks..

I am using RED HAT Linux 7.3 ...

when i tried to set DMA on

# /sbin/hdparm -d 1 /hda/hdb

I get following message.

/dev/hdb:
setting using_dma to 1 (on)
HDIO_SET_DMA failed: Operation not permitted
using_dma    =  0 (off)

I am using Intelchipset motherborad, and Maxtor hard
drive

# /sbin/hdparm -iv /dev/hdb

/dev/hdb:
multcount    = 16 (on)
I/O support  =  3 (32-bit w/sync)
unmaskirq    =  0 (off)
using_dma    =  0 (off)
keepsettings =  0 (off)
nowerr       =  0 (off)
readonly     =  0 (off)
readahead    =  8 (on)
geometry     = 79656/16/63, sectors = 80293248, start
= 0

Model=Maxtor 2F040J0, FwRev=VAM51JJ0,
SerialNo=F12WD7TE
Config={ Fixed }
RawCHS=16383/16/63, TrkSize=0, SectSize=0,ECCbytes=57
BuffType=DualPortCache, BuffSize=2048kB,MaxMultSect=16, MultSect=16
CurCHS=16383/16/63, CurSects=16514064, LBA=yes,LBAsects=80293248
IORDY=on/off, tPIO={min:120,w/IORDY:120},tDMA={min:120,rec:120}
PIO modes: pio0 pio1 pio2 pio3 pio4
DMA modes: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3udma4 *udma5 udma6
AdvancedPM=yes: disabled (255) WriteCache=enabled
Drive Supports : ataATA-1 ATA-2 ATA-3 ATA-4 ATA-5ATA-6 ATA-7

busstate     =  1 (on)


Can you please tell me what should i do to enable DMA
support.



Thanks
Santosh

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Re: Can any one please help me..

[Adam Voigt]

A. You must be logged in as root.
B. Your device is /dev/hda for your first hard drive.

Enjoy!

On Thu, 2003-01-23 at 09:09, Santosh Kumar Cheekatmalla wrote:
    Hi Everyone,
    
    Can you please help me enable DMA on my machine.
    
    I am new to linux , so can you be little elaborate in your reply
    thanks..
    
    I am using RED HAT Linux 7.3 ...
    
    when i tried to set DMA on
    
    # /sbin/hdparm -d 1 /hda/hdb
    
    I get following message.
    
    /dev/hdb:
    setting using_dma to 1 (on)
    HDIO_SET_DMA failed: Operation not permitted
    using_dma    =  0 (off)
    
    I am using Intelchipset motherborad, and Maxtor hard
    drive
    
    # /sbin/hdparm -iv /dev/hdb
    
    /dev/hdb:
    multcount    = 16 (on)
    I/O support  =  3 (32-bit w/sync)
    unmaskirq    =  0 (off)
    using_dma    =  0 (off)
    keepsettings =  0 (off)
    nowerr       =  0 (off)
    readonly     =  0 (off)
    readahead    =  8 (on)
    geometry     = 79656/16/63, sectors = 80293248, start
    = 0
    
    Model=Maxtor 2F040J0, FwRev=VAM51JJ0,
    SerialNo=F12WD7TE
    Config={ Fixed }
    RawCHS=16383/16/63, TrkSize=0, SectSize=0,ECCbytes=57
    BuffType=DualPortCache, BuffSize=2048kB,MaxMultSect=16, MultSect=16
    CurCHS=16383/16/63, CurSects=16514064, LBA=yes,LBAsects=80293248
    IORDY=on/off, tPIO={min:120,w/IORDY:120},tDMA={min:120,rec:120}
    PIO modes: pio0 pio1 pio2 pio3 pio4
    DMA modes: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3udma4 *udma5
    udma6
    AdvancedPM=yes: disabled (255) WriteCache=enabled
    Drive Supports : ataATA-1 ATA-2 ATA-3 ATA-4 ATA-5ATA-6 ATA-7
    
    busstate     =  1 (on)
    
    
    Can you please tell me what should i do to enable DMA
    support.
    
    
    
    Thanks
    Santosh
    
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Re: Can any one please help me..

[Bernd Schubert]

On Thursday 23 January 2003 15:21, Adam Voigt wrote:
> A. You must be logged in as root.
> B. Your device is /dev/hda for your first hard drive.
>
> Enjoy!
>


Hmm,

that might work, but when when the chipset is not supported we also see the 
the oppereation not permitted messages.
So Santosh, if you run hdparm as root and still get those messages, your 
chipset might not be suppported. Your /var/log/messages should give you more 
information about whats going on, especially the kernel-ide detection lines. 
Without further information about your mainboard and the kernel version you 
are using, all of this is only speculation.

Bernd