Hitachi disk performance
O. Hartmann
ohartman at mail.uni-mainz.de
Sun Sep 24 14:33:43 PDT 2006
ajmm at portugalmail.pt wrote:
>
>
> Hi!
>
> I saw your posts with title "Performance issue amd64". I don't know if this
> could help, but I'm having the same problem with ICH5 SATA controller and the
> same Hitachi drives on linux. I cannot activate DMA, and bandwidth is lesser
> than 10MB/s. I could not solve the problem, until now. BTW, with "any" other
> drives, the problem does not exist.
>
> Antonio Marques
> __________________________________________________________
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I did not dig deeper into that problem - due to the lack of suitable
hardware. Bonnie shows about 55 MB/s sustained performance, sometimes
higher, burst reaches 117 MB/s. With the old disks, both values were
about 25 MB/s higher. I doubt this is only a partition layout related
issue. The average performance droped remarkable, especially while
compiling world.
At the Hitachi website I did not find any hint about issues with several
controllers or especially with SATA PseudoRAID like nForce4 offers, hope
this can be fixed anyway and it's a simple firmware issue.
Checking the disks via the Hitachi brewn drive fitness tool gives no
suspicious data, mode is SATA II/300, no accoustic or energy management
and so on ...
I would appreciate any solvage, if you have one!
Well, in your case, I would check whether your drive is in SATA 150 mode
(factory setting) or SATA 300, as I know the ICH5 is only SATA 150 and
drives with problems switching to SATA 150 while in SATA 300 could cause
problems.
Regards,
Oliver
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