I searched for relevant problems, but without success.
I have Supermicro P4DPE motherboard, 2-Xeons and four Ultra100 TX2 PCI
IDE conrollers.
The motherboard has several PCI buses. Mapping of PCI slots to the buses
is the following:
PCI Slot 1-3 (66 Mhz): bus 5 (bus number reported by linux startup
messages)
PCI Slot 4 (66 Mhz): bus 6
PCI-X Slot 5 (66 Mhz): bus 3
PCI-X Slot 6 (100 Mhz): bus 2
PCI-X slots configured as plain PCI
100 Mhz slot configured to function at 66 Mhz
When I plug in 4 cards into slots 1-4 or 1-3 and 5 everything is fine,
Linux boots, I have ULTRA DMA 100 on each of them.
But I wanted to avoid bus bandwith saturation moving each controller to
the separate bus (now I can't get more then 240 Mb/s with 8 disk. With 4
disks parallel read rate is 190 Mb/s, seems to be bottleneck in the PCI
bus).
It failed (none of configurations except 1-4 and 1,2,3,5 work) linux
stops after the message, corresponding to the last controller (other
controllers are also reported):
PDC20268: IDE controller on PCI bus 06 dev 08
PDC20268: chipset revision 2
PDC20268: not 100% native mode: will probe irqs later
PDC20268: (U)DMA Burst Bit DISABLED Primary MASTER Mode Secondary MASTER
Mode.
PDC20268: FORCING BURST BIT 0x50 -> 0x51 INACTIVE
ide8: BM-DMA at 0x4000-0x4007, BIOS settings: hdq:pio, hdr:pio
ide9: BM-DMA at 0x4008-0x400f, BIOS settings: hds:pio, hdt:pio
Any ideas? Where is problem?
On Wed, Aug 21, 2002 at 11:37:44AM +0200, Roman Dementiev wrote:
> I searched for relevant problems, but without success.
>
> I have Supermicro P4DPE motherboard, 2-Xeons and four Ultra100 TX2 PCI
> IDE conrollers.
>
> The motherboard has several PCI buses. Mapping of PCI slots to the buses
> is the following:
>
> PCI Slot 1-3 (66 Mhz): bus 5 (bus number reported by linux startup
> messages)
> PCI Slot 4 (66 Mhz): bus 6
> PCI-X Slot 5 (66 Mhz): bus 3
> PCI-X Slot 6 (100 Mhz): bus 2
>
> PCI-X slots configured as plain PCI
> 100 Mhz slot configured to function at 66 Mhz
>
> When I plug in 4 cards into slots 1-4 or 1-3 and 5 everything is fine,
> Linux boots, I have ULTRA DMA 100 on each of them.
>
> But I wanted to avoid bus bandwith saturation moving each controller to
> the separate bus (now I can't get more then 240 Mb/s with 8 disk. With 4
> disks parallel read rate is 190 Mb/s, seems to be bottleneck in the PCI
> bus).
>
> It failed (none of configurations except 1-4 and 1,2,3,5 work) linux
> stops after the message, corresponding to the last controller (other
> controllers are also reported):
>
> PDC20268: IDE controller on PCI bus 06 dev 08
> PDC20268: chipset revision 2
> PDC20268: not 100% native mode: will probe irqs later
> PDC20268: (U)DMA Burst Bit DISABLED Primary MASTER Mode Secondary MASTER
> Mode.
> PDC20268: FORCING BURST BIT 0x50 -> 0x51 INACTIVE
> ide8: BM-DMA at 0x4000-0x4007, BIOS settings: hdq:pio, hdr:pio
> ide9: BM-DMA at 0x4008-0x400f, BIOS settings: hds:pio, hdt:pio
>
>
> Any ideas? Where is problem?
Just a thought: What are the interupt assignments?
You might try sticking other cards (NICs?) in slots 4 and 5 to
confirm assignments.
I'm afraid i can't be more help that this.
--
________________________________________________________________
J.W. Schultz Pegasystems Technologies
email address: [email protected]
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