Advice on Cluster Hardware.

Alcino Dall Igna Junior alcino at lncc.br
Wed Feb 6 07:34:52 EST 2002


Problably a silly sugestion, but you are using a proper
cable to connect the HD?

Alcino

On Wed, 6 Feb 2002, Nirmal Bissonauth wrote:

> Hi All,
> 
> I have 6 Tyan Thunder K7 motherboards (Dual 1.2 GHz Athlon MP) in my
> cluster. I am using Redhat7.2, kernel 2.4.9-13smp. The problem I get is
> with the E-IDE driver. It does not correctly initialise the AMD7411 IDE 
> controller and thus it can't go any faster than UDMA33 with the IDE hard
> drives. You may have the same problem with the Tyan Tiger MP.
> 
> Here are the kernel messages during boot up. I can use the override
> parameters idebus=66, but I can't confirm that it actually makes it go any
> faster. The hard drive is capable of UDMA 100 by the way. 
> 
> Uniform Multi-Platform E-IDE driver Revision: 6.31
> ide: Assuming 33MHz PCI bus speed for PIO modes; override with idebus=xx
> AMD7411: IDE controller on PCI bus 00 dev 39
> AMD7411: chipset revision 1
> AMD7411: not 100% native mode: will probe irqs later
> AMD7411: disabling single-word DMA support (revision < C4)
>     ide0: BM-DMA at 0xf000-0xf007, BIOS settings: hda:DMA, hdb:pio
>     ide1: BM-DMA at 0xf008-0xf00f, BIOS settings: hdc:pio, hdd:pio
> hda: IC35L040AVER07-0, ATA DISK drive
> ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
> hda: 80418240 sectors (41174 MB) w/1916KiB Cache, CHS=79780/16/63,
> UDMA(33)
> 
> 
> Regards  
> Nirmal Bissonauth
> 
> 
> On Tue, 5 Feb 2002, Alberto Ramos wrote:
> 
> > 
> >   Here in a university of Madrid, we are designing a Beowulf for paralel
> > computing in QCD. We will begin with a small cluster to see the performance
> > and later try with other comunications, like mirynet.
> > 
> >   The Hardware will be 4 nodes each consisting of:
> >   
> >   - 2xAMD MP 1800+ CPU
> >   - 1x512MB RAM DDR
> >   - 1xTyan tiger MP
> >   - 2x3-COM 905B NIC
> >   - 20GB HD
> >   
> >   The master node has 1GB of RAM DDR, and one aditional HD to use as /home.
> >   
> >   The conection will be trought a HP Procurve Switch 408 with 8 ports to use
> > Chanel Bonding.
> > 
> >   Now the questions:
> >   
> >   - Any known problems with the hardware?
> >   - Are the NIC and the Switch good choices?
> >   - Will the Intel FORTRAN 90 Compiler work with this hardware.
> >   
> >   Thank you very much for your time.
> >   
> >   Alberto.
> >   
> > _______________________________________________
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> > 
> 
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