Check your Compaq specs on each server...I think that you are a little
off...PCI 2.1 and 2.2 only became available with the new 8 way Xeon
8000/8500's. Prior to that PCI 2.0 was supported across the board. Keep in
mind that this PCI support is a function of the Intel chipset, not a Compaq
Regardless...the PCI bus is not the bottleneck, when a bus master FC card
arbitrates for the PCI bus, he gets full 133MB/s bandwidth, since only one
device can use the bus at a time there is no problem supporting 4 FC cards.
They each get their turn...
> Actually depends on the PCI slots in your server. Even Compaq ProLiant
> is not enough, because it depends on the board revision.
> There are 3 PCI standards. First three are available in Compaq Servers,
> last will be...:
> PCI 2.0, 33MHz, 32-bit, 132MB/s peak
> PCI 2.1, 66MHz, 32-bit, 264MB/s peak
> PCI 2.2, 66MHz, 64-bit, 528MB/s peak
> PCI-X, 133MHz, 64-bit, 1056MB/s peak (not available, future project)
> Usually there are at least 2 x PCI 2.2 and 4 PCI 2.1 slots in Compaq
> Proliant 5500 and above. Usually...
> Vassil Velichkov
> > For a database application, I am wondering what is the
> > theoretical maximum number of megabytes per second that could be
> > moved off a system disk of an external drive and moved into
> > memory of a top-line Wintel server.
> > Assume you had the following configuration:
> > - four fibre channel controllers in the server
> > - each controller is connected to a single logical drive, based
> > on an external RAID controller that stripes a huge disk array
> > - each controller is moving data to the host at 100 megabytes per
> > second
> > - the host stripes the four logical drives on the four
> > controllers, as a single RAID 0 drive (protection in this case
> > comes from the RAID5 stripe in the external controllers)
> > - theoretically, there could be 400 megs moving toward the host
> > at peak load
> > - the host is a Compaq ProLiant 7000 with 4 gigs of memory and
> > four Xeon 500 CPUs
> > Given the current limitations of the PCI bus, what is the maximum
> > amount of data that the system could receive?
> > --
> > Will
> > Internet: westes at uscsw.com
> > PLEASE READ: To send me Internet e-mail, you must change the
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> > on this message from the word 'junkmail' to the word 'westes'.
> > If you reply
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