On Mon, 24 Jul 2006 16:40:08 +0200, "Volker A. Brandt" <vab@bb-c.de> wrote:
>> would it be possible to take the motherboard (+CPU, +RAM) from an Ultra10
>> and plug it into the case of an Ultra5 ?
> 
> Yes, that is possible.  It's the same motherboard, and even OBP
> does not know if it is an Ultra 5 or Ultra 10... :-)
> 

heh, yes... seen on dmesg.

>> - because CPU is 100MHz faster and IDE bus is 66MHz rather than 33MHz
> (according to eBay and google's dmesg).
> 
> That is strange.  It's possible that there were different boards
> with different speeds, but I rather doubt it.
> 

I have a dmesg (from an U10 running 3.0_BETA) saying:
wd0 at atabus0 drive 0: <ST320420A>
wd0: drive supports 16-sector PIO transfers, LBA addressing
wd0: 19458 MB, 39535 cyl, 16 head, 63 sec, 512 bytes/sect x 39851760 sectors
wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 4 (Ultra/66)
wd0(cmdide0:0:0): using PIO mode 4, DMA mode 2 (using DMA)

and an Ultra5, running 3.0_STABLE saying:
wd0 at atabus0 drive 0: <ST39140A>
wd0: drive supports 16-sector PIO transfers, LBA addressing
wd0: 8693 MB, 17662 cyl, 16 head, 63 sec, 512 bytes/sect x 17803440 sectors
wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 2 (Ultra/33)
wd0(cmdide0:0:0): using PIO mode 4, DMA mode 2 (using DMA)

But I'm not sure where this U10 comes from - I mean, maybe Sun sold only 100 of those :)

> Maybe the Service Manual tells you more:
> 
> http://fr.sunsolve.sun.com/data/805/805-0423/pdf/805-0423-11.pdf
> 

Didn't found about PCI speed last time a checked.
But I may have read it too fast :)

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