Re: Abysmal PATA IDE performance

[Stephen Clark <Stephen.Clark@seclark.us>]

Luca Tettamanti wrote:

> On 11/9/06, Stephen Clark <Stephen.Clark@seclark.us> wrote:
>  
>
> > Luca Tettamanti wrote:
> >
> >    
> >
> > > Stephen Clark <Stephen.Clark@seclark.us> ha scritto:
> > >
> > >
> > >      
> > >
> > > > Looking at the dmesg output I am a little confused, see comments below:
> > > > partial dmesg output follows:
> > > >
> > > > SCSI subsystem initialized
> > > > libata version 2.00 loaded.
> > > > ata_piix 0000:00:1f.2: version 2.00
> > > > ata_piix 0000:00:1f.2: MAP [ P0 P2 IDE IDE ]
> > > > ACPI: PCI Interrupt 0000:00:1f.2[B] -> GSI 19 (level, low) -> IRQ 233
> > > > PCI: Setting latency timer of device 0000:00:1f.2 to 64
> > > > ata1: SATA max UDMA/133 cmd 0x1F0 ctl 0x3F6 bmdma 0xFFA0 irq 14
> > > > scsi0 : ata_piix
> > > > Synaptics Touchpad, model: 1, fw: 6.1, id: 0xa3a0b3, caps: 0xa04713/0x10008
> > > > input: SynPS/2 Synaptics TouchPad as /class/input/input1
> > > > ATA: abnormal status 0x7F on port 0x1F7
> > > > ata2: PATA max UDMA/100 cmd 0x170 ctl 0x376 bmdma 0xFFA8 irq 15
> > > > scsi1 : ata_piix
> > > > ata2.00: ATA-6, max UDMA/100, 117210240 sectors: LBA48
> > > > ata2.00: ata2: dev 0 multi count 16
> > > > usb 2-2: new low speed USB device using uhci_hcd and address 3
> > > > ata2.01: ATAPI, max UDMA/33
> > > > ata2.00: configured for UDMA/33 <==== why isn't this 66 or 100 ?
> > > > ===============****
> > > >
> > > >
> > > >        
> > > This is your optical (CD/DVD) unit; I doubt that you can saturate that
> > > link, even if your drive can do a sustained 16x transfer with a DVD it
> > > will use only 21MBps. Your HD is using UDMA/100.
> > >      
> > aren't the ata2.00: messages referring to my hard drive and the
> > ata2.01 messages referring to my optical drive?
> >
> > ata2.00: ATA-6, max UDMA/100, 117210240 sectors: LBA48
> > ata2.00: ata2: dev 0 multi count 16
> >
> > ata2.01: ATAPI, max UDMA/33
> >
> > ata2.00: configured for UDMA/33 <==== why isn't this 66 or 100 ?
> >    
>
> You're right, I misparsed your log. Probably Arjan is right about the wiring.
>
> Luca
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>  
Hi Luca,

The specs for the laptop say it supports ide 100MBps (Ultra DMA 5).
Datová propustnost k IDE:   100 MBps (Ultra DMA 5)

Steve


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