Proliant ML110 G3 and embedded SATA RAID 1 problem

[Celso Suzuki]

Hi,

I installed RHAS4U2 on Proliant ML110 G3 and embedded SATA RAID 1 and I having a performance problem.
When I run a dd command to create a file
[root@HP ~]# time dd if=/dev/zero of=/root/teste_desempenho
bs=256000 count=4000
4000+0 registros de entrada
4000+0 registros de saída

real 2m53.488s
user 0m0.004s
sys 0m3.809s

It takes almost 3 minutes to create.
In a box with SEMPRON 2.2 with FC5, it takes only 25 seconds.

I installed RHAS4U2 with the driver from HP to recognize the RAID.

Any help, please ?

Thanks

Celso Suzuki

[DmitryB]

Hi!
I have almost the same
time dd if=/dev/zero of=/root/teste_desempenho bs=256000 count=4000
4000+0 records in
4000+0 records out

real 2m19.034s
user 0m0.006s
sys 0m4.124s

I have Centos 4.2 Linux on ML110G3 HP Embedded SATA RAID Controller ( the same in ML150)

On HP dx2000 on single IDE drive I've got just 29 sec.

Seem to me that RAID driver for Linux has to be
improved well.

Dear HP Supporters, help, please!

Dmitry

[Michael Richter]

Try the following,

1. update FW to the latest Revisions
2. use latest Raid Drivers
3. be sure Raid isn'T rebuilding or expanding
4. change write-Cache Mode from 'write through' to 'write back' by using Storage Manger or you enable hard drive Write Cache setting [use 'Ctrl+W' in SATA Setup]

Cheers
Mike

[Celso Suzuki]

Hi,

Thanks for reply.
Well, all drivers are the newest one.
I got all from HP site.

I call the HP support and they check my hardware and the firmware and they told me that all is correct and cannot help me.

If I'd like, I may call the another team, that will check the machine performance but I must to pay for that!!!

I told them that I have only the HP ML110 and the RHAS4U2, that is a certified system. Nothing else.

But they told that cannot help me because the hardware is OK, so if I want performance I must to pay to check that.

Can you believe ???

[Michael Richter]

Celso,

i know its time expensive, but may u can install a windows OS and check eg. with IO Meter whats the performance there ....

try also whats the performance with RAiDLevel:0

did u test Step4 i've postet?

regards
Mike

[Celso Suzuki]

Hi Mike,

About Number 4, I have already tested.

I didn't test it on windows.

I tested it without RAID, installed RHAS4U2 on SATA Disk without RAID and the performance is OK. In both disks

[root@HP ~]# time dd if=/dev/zero of=/root/teste_desempenho bs=256000 count=4000
4000+0 registros de entrada
4000+0 registros de sa�a

real 0m32.797s
user 0m0.005s
sys 0m3.698s
[root@HP ~]# time dd if=/dev/zero of=/home2/teste_desempenho bs=256000 count=4000
4000+0 registros de entrada
4000+0 registros de sa�a

real 0m25.838s
user 0m0.004s
sys 0m4.028s

It works but it is unacceptable because I bought the machine to work in a RAID 1 mode.

I bought a branded machine to have some guarantee, perhaps if I bought a Mother board and HD by myself it is working fine now, expendind much less time and money.

[Michael Richter]

Celso,

please try editing grub.conf and add:

ide0=noprobe

or if u're using lilo:

append="ide=noprobe"


cheers
Mike

[Celso Suzuki]

Hi Mike,

Thanks for reply.

I tested the option that you suggested but it has no effect.
The time spent is the same.

Any other ideia ?

I accept any suggestion.

I think that Dmitri is correct and the problem is the driver.


Thanks

Celso Suzuki