[ On Tuesday, April 29, 2003 at 18:44:11 (-0400), I wrote: ]
> Subject: why no Ultra-DMA mode 5 for ServerWorks CSB5 IDE 0x93 with WDC WD600JB-00CRA1 drive?
>
> Anyone have any idea why this drive attaches with Ultra-DMA mode 2
> instead of Ultra-DMA mode 5?
> 
> pciide0 at pci0 dev 15 function 1: ServerWorks CSB5 IDE Controller (rev. 0x93)
> pciide0: bus-master DMA support present
> pciide0: primary channel configured to compatibility mode
> wd0 at pciide0 channel 0 drive 0: <WDC WD600JB-00CRA1>
> wd0: drive supports 16-sector PIO transfers, LBA addressing
> wd0: 57241 MB, 16383 cyl, 16 head, 63 sec, 512 bytes/sect x 117231408 sectors
> wd0: 32-bit data port
> wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100)
> pciide0: primary channel interrupting at irq 14
> wd0(pciide0:0:0): using PIO mode 4, DMA mode 2, Ultra-DMA mode 2 (Ultra/33) (using DMA data transfers)
> 
> 
> This appears to be caused by the following code:
> 
> 1.149 (mycroft  12-Apr-02):                      /* use Ultra/DMA, check for 80-pin cable */
> 1.149 (mycroft  12-Apr-02):                      if (drvp->UDMA_mode > 2 &&
> 1.149 (mycroft  12-Apr-02):                          (PCI_PRODUCT(pci_conf_read(sc->sc_pc, sc->sc_tag, PCI_SUBSYS_ID_REG)) & (1 << (14 + channel))) == 0)
> 1.149 (mycroft  12-Apr-02):                              drvp->UDMA_mode = 2;
> 
> 
> I'm just going to comment it out for now.

Ah yes, that's much better:

pciide0 at pci0 dev 15 function 1: ServerWorks CSB5 IDE Controller (rev. 0x93)
pciide0: bus-master DMA support present
pciide0: primary channel configured to compatibility mode
wd0 at pciide0 channel 0 drive 0: <WDC WD600JB-00CRA1>
wd0: drive supports 16-sector PIO transfers, LBA addressing
wd0: 57241 MB, 16383 cyl, 16 head, 63 sec, 512 bytes/sect x 117231408 sectors
wd0: 32-bit data port
wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100)
pciide0: primary channel interrupting at irq 14
wd0(pciide0:0:0): using PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100) (using DMA data transfers)

-- 
								Greg A. Woods

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