hi ya jelte
On Wed, 6 Nov 2002, Jelte Liebrand wrote:
> Hi all,
>
> I'm trying to set the DMA to on for my hd without much success. I have
> pasted below all the information I think is relevant. I'm doing all the
> below as root, and as you can see, somehow setting the DMA is not
> permitted. My computer is about 6 months old, and I'm running the
> 2.4.18-k7 kernel.
>
> The error I get when using "hdparm -d1 /dev/hda" as root (root should be
> allowed to do this right??):
the typical reason why hdparm would fail is because the chipset on
the motherboard or ide controller connected to the disk drive is
NOT "completely" supported by the kernel
- check the manufacturer and part number of the ide controller
and enable those part numbers in the ide/ata/dma section of the
kernel configs
and yes.. yoour drive is already set to run at udma5 ( ata100 )
basd on the * next to udma5 in your listing below
- just fix up your kernel or modules and you're all set
for more ata fun
http://wwww.Linux-1U.net/Disks
have fun
alvin
> /dev/hda:
> setting using_dma to 1 (on)
> HDIO_SET_DMA failed: Operation not permitted
> using_dma = 0 (off)
>
> The chipset and other info about my hd from dmesg:
> hda: IC35L080AVVA07-0, ATA DISK drive
> hda: 160836480 sectors (82348 MB) w/1863KiB Cache, CHS=159560/16/63
>
> Result of "hdparm /dev/hda":
> /dev/hda:
> multcount = 16 (on)
> I/O support = 3 (32-bit w/sync)
> unmaskirq = 1 (on)
> using_dma = 0 (off)
> keepsettings = 0 (off)
> nowerr = 0 (off)
> readonly = 0 (off)
> readahead = 8 (on)
> geometry = 10011/255/63, sectors = 160836480, start = 0
> busstate = 1 (on)
>
> and the result of "hdparm -i /dev/hda":
> /dev/hda:
>
> Model=IC35L080AVVA07-0, FwRev=VA4OA50K, SerialNo=VNC400A4G4PMSA
> Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }
> RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=52
> BuffType=DualPortCache, BuffSize=1863kB, MaxMultSect=16, MultSect=16
> CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=160836480
> IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120}
> PIO modes: pio0 pio1 pio2 pio3 pio4
> DMA modes: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 *udma5
> AdvancedPM=yes: disabled (255) WriteCache=enabled
> Drive Supports : ATA/ATAPI-5 T13 1321D revision 1 : ATA-2 ATA-3 ATA-4
> ATA-5
>
> and the result of "hdparm -tT /dev/hda":
> /dev/hda:
> Timing buffer-cache reads: 128 MB in 0.50 seconds =256.00 MB/sec
> Timing buffered disk reads: 64 MB in 9.97 seconds = 6.42 MB/sec
>
>
> Any help would be mostly appreciated
> /Jelte
>
>
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