FreeBSD 5.3b7and poor ata performance

fandino fandino at ng.fadesa.es
Tue Oct 26 09:07:18 PDT 2004


Scott Long wrote:
> RAID-0 yes, RAID-10 no, at least not for software RAID.  The machine 
> winds up having to transfer the same data twice across the PCI bus,
> twice through the controller, etc.  If the controller is on a simple
> PCI-32/33 bus then it will quickly become saturated.

When I tested gstripe throughput it was very bad and it makes me think
in my PC hitting some limit and my thoughts was some type of limit in
the OS, it was my _particular_ case. Of course, you comments about
RAID are right, but do you think a RAID0 with two disks is reaching
the PCI limit?



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