DMA podpora na IDE disku

[Vladimír Jirásek]

Pavel Trefny wrote:

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> Musite mit podporu radice v jadre a taky se tam nastavuje defaultni stav
> radice(to ze ma jet v DMA).
> Zatim
> On Thu, 9 Aug 2001, Vladimir Jirasek wrote:
> 
>> Dobry den,
>>
>> mam system RedHat 7.1CZ, kernel 2.4.7-ac5, ide disky Wester digital a
>> desku Soltek 75DRV. Zatouzil jsem si zakoupit dalsi IDE radic pro CDROM a
>> vypalovacku. Koupil jsem KOUWEL s cipem myslim CMD6xx.
>> No a pote co jsem na nej zkusebne pripojil IDE disky a otestoval si
>> rychlost (jenom 14MB/s oproti 29MB/s) jsem to zase rychle zapojil zpatky.
>> No a najednou mi nejde nastavit UDMA podpora prikazem:
>> hdparm -d1 /dev/hda ani na /dev/hdc.
>> Pise to:
>> HDIO_DMA_SET failed: Operation not permited.
>> Tak nevim, poradi nekdo? Potrebujete vice informaci?
>>
>> Diky moc za radu, protoze ted jedu na 2,5MB/s a to je opravdu malo.
>>
>> Vladimir Jirasek
>>

Diky za rady. Zkusil jsem resetovat PCI, a nic. Ten CMD radic jsem vyndal, 
takze disky mam zapojene stejne jako pred jeho instalaci. No a stale nic. 
pro jistotu priklsdam dmesg a error hlasku:

dmesg.
CPU: AMD Athlon(tm) Processor stepping 02
Enabling fast FPU save and restore... done.
Checking 'hlt' instruction... OK.
POSIX conformance testing by UNIFIX
PCI: PCI BIOS revision 2.10 entry at 0xfb420, last bus=1
PCI: Using configuration type 1
PCI: Probing PCI hardware
Unknown bridge resource 0: assuming transparent
PCI: Using IRQ router default [1106/3099] at 00:00.0
isapnp: Scanning for PnP cards...
isapnp: No Plug & Play device found
Linux NET4.0 for Linux 2.4
Based upon Swansea University Computer Society NET3.039
Initializing RT netlink socket
Starting kswapd v1.8
VFS: Diskquotas version dquot_6.5.0 initialized
ACPI: Core Subsystem version [20010615]
ACPI: Subsystem enabled
Console: switching to colour frame buffer device 80x30
rivafb: PCI nVidia NV4 framebuffer ver 0.9.2a (RIVA-TNT, 16MB @ 0xE6000000)
pty: 256 Unix98 ptys configured
Serial driver version 5.05c (2001-07-08) with MANY_PORTS SHARE_IRQ 
SERIAL_PCI ISAPNP enabled
ttyS00 at 0x03f8 (irq = 4) is a 16550A
ttyS01 at 0x02f8 (irq = 3) is a 16550A
block: queued sectors max/low 169597kB/56532kB, 512 slots per queue
Uniform Multi-Platform E-IDE driver Revision: 6.31
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
VP_IDE: IDE controller on PCI bus 00 dev 89
VP_IDE: chipset revision 6
VP_IDE: not 100% native mode: will probe irqs later
VP_IDE: Unknown VIA SouthBridge, contact Vojtech Pavlik <vojtech na suse.cz>
hda: WDC AC29100D, ATA DISK drive
hdc: WDC WD400AB-00BVA0, ATA DISK drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
ide0: probed IRQ 14 failed, using default.
ide1 at 0x170-0x177,0x376 on irq 15
ide1: probed IRQ 15 failed, using default.
hda: 17803440 sectors (9115 MB) w/1966KiB Cache, CHS=1108/255/63
hdc: 78165360 sectors (40021 MB) w/2048KiB Cache, CHS=77545/16/63P

a ta chyba:
# hdparm -d1 /dev/hda
 
/dev/hda:
 setting using_dma to 1 (on)
 HDIO_SET_DMA failed: Operation not permitted
 using_dma    =  0 (off)

Diky za pomoc.

Vladimir Jirasek