Does a 4422 pci cards really need a 66 Mhz PCI bus ?

Does a 4422 pci cards really need a 66 Mhz PCI bus ?

Post by Eric Rolan » Fri, 14 Apr 2006 03:52:33



Hello,

Thank for your comments. The question takes place in a 33 or 66 Mhz
context.

Regards

E.R
Spain

 
 
 

Does a 4422 pci cards really need a 66 Mhz PCI bus ?

Post by Scott Howar » Sat, 15 Apr 2006 09:50:22



> Thank for your comments. The question takes place in a 33 or 66 Mhz
> context.

Depends what you're trying to do with it.  The 4422 has 2x GigE ports,
and 2x SCSI (160 or 320, forget which).

If you want to run everything at full speed at the same time, a 33Mhz
bus _will_ limit performance.  If you're just running the networks at
100Mbps (or even GigE without much traffic), and the SCSI ports are
just your boot disks, then 33Mhz will be fine.

  Scott

 
 
 

1. E450 PCI bus speed - 33 or 66 MHz

Hi,

I was just wondering what's a clock of bus of my E450.

/usr/platform/sun4u/sbin/prtdiag
tells me its 33 MHz, which seems to be a bit slow
comparing to what www.sun.com says - where's 66 MHz ?

I checked dejanews and found something relevant like these posts:

http://x44.deja.com/[ST_rn=ps]/getdoc.xp?AN=427631820&CONTEXT=945252625.1057554433&hitnum=1
http://x44.deja.com/[ST_rn=ps]/getdoc.xp?AN=452812161&CONTEXT=945252625.1057554433&hitnum=3

but still I'm not sure - it is possible that prtdiag reports
clock for external ports, while the system uses 66 MHz for
internal ?

Rgds,

Andrei

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