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#1 (**permalink**) 01-04-2008, 08:47 PM

Hi

I have a 6H1 with 4 750MHz CPUs, 4GB Memory an an Advanced SSA Adapter
with one 7133-D40 connected. I use two looks. In the disk encloshure
are 8 9gb disks, two 18gb disks and six 36gb disks. each configured
for raid1.

i have performance problems with the oracle 8.1.7 installation. the
cpu´s will have 64 to 98% wio´s.

i have tested the thoughput of the disks with dd if=/dev/hdisk7
of=/dev/null bs=1024k (36 gb raid 1 disk). the maximum of transferrate
was 5mb/s. i think it shoult be between 15-25mb/s.

have anyone a idea, what is wron here?

Regards, Hubert

#2 (**permalink**) 01-04-2008, 08:47 PM

On Fri, 07 Nov 2003 22:29:02 +0100, hubert.wirtensohn@gmx.at wrote:

On the system we have installed aix 4.3.3-10.

Hubert

>Hi
>
>I have a 6H1 with 4 750MHz CPUs, 4GB Memory an an Advanced SSA Adapter
>with one 7133-D40 connected. I use two looks. In the disk encloshure
>are 8 9gb disks, two 18gb disks and six 36gb disks. each configured
>for raid1.
>
>i have performance problems with the oracle 8.1.7 installation. the
>cpu´s will have 64 to 98% wio´s.
>
>i have tested the thoughput of the disks with dd if=/dev/hdisk7
>of=/dev/null bs=1024k (36 gb raid 1 disk). the maximum of transferrate
>was 5mb/s. i think it shoult be between 15-25mb/s.
>
>have anyone a idea, what is wron here?
>
>
>Regards, Hubert

#3 (**permalink**) 01-04-2008, 08:47 PM

> i have tested the thoughput of the disks with dd if=/dev/hdisk7
> of=/dev/null bs=1024k (36 gb raid 1 disk). the maximum of transferrate
> was 5mb/s. i think it shoult be between 15-25mb/s.

You need to use "if=/dev/rhdisk7".

#4 (**permalink**) 01-04-2008, 08:49 PM

hubert.wirtensohn@gmx.at wrote in message news:<vd3oqvchrr3pngof4m8v5b3ka95ing4ns2@4ax.com>. ..
> Hi
>
> I have a 6H1 with 4 750MHz CPUs, 4GB Memory an an Advanced SSA Adapter
> with one 7133-D40 connected. I use two looks. In the disk encloshure
> are 8 9gb disks, two 18gb disks and six 36gb disks. each configured
> for raid1.
>
> i have performance problems with the oracle 8.1.7 installation. the
> cpu´s will have 64 to 98% wio´s.
>
> i have tested the thoughput of the disks with dd if=/dev/hdisk7
> of=/dev/null bs=1024k (36 gb raid 1 disk). the maximum of transferrate
> was 5mb/s. i think it shoult be between 15-25mb/s.
>
> have anyone a idea, what is wron here?
>
>
> Regards, Hubert

Within the "diag" menu, select SSA Service Aids
Then select SSA Link Verification
After that, select SSA Speed Verification

BV

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