Daniel Veillard wrote:
>
> > I'm about to set up some Dell PowerEdge 6100/200 (Dual and Quad PPro) to
> > run linux smp. The boxen come with AMI 'Dell RAID II' (or somesuch)
> > controllers (i960 based), which I probably won't be using at first.
> >
> > Are there any issues or gotchas with these?
>
> Those RAID cards are now supported in standard in 2.0.36 and 2.2.x, but
> they perform *really* badly under linux. Probably due to an untuned driver
> basically iozone or any I/O test program nearly freeze the machine :-(
>
> You can try software RAID, or buy another brand of RAID cards.
Talk to AMI. I believe they are ready to release their version 1.0.0
driver for 2.0 and 2.2 kernels that includes A) better SMP support, B)
multiple outstanding commands at a time, C) the userland based megamgr
utility that lets you manage the RAID controller from user land instead
of rebooting into the BIOS on the card to work with the RAID arrays.
The big issue for performance is B. The old driver will only send one
command to the card at a time, while the new driver sends multiple
commands at a time.
--
Doug Ledford <[EMAIL PROTECTED]>
Opinions expressed are my own, but
they should be everybody's.
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