Re: 3ware disk latency?

[David Lang]

On Thu, 27 Jul 2006, Jan Kasprzak wrote:

> dean gaudet wrote:
> : my suspicion is the 3ware lacks any sort of "fairness" in its sharing of
> : buffer space between multiple units on the same controller.  and by
> : disabling the write caching it limits the amount of controller memory that
> : the busy disk can consume.
>
> 	Hmm, do you have a battery backup unit for 9550sx? I don't,
> and the 3ware BIOS does not even allow me to enable write caching without it.
> So I don't think the write caching on the controller side is related
> to my problem.

interesting, on the 9500 series cards I have it pops up a 'are you really sure, 
this is dangerous' warning, but it did allow me to turn on write caching (I've 
since received the batteries, but I did test it before that)

David Lang

> 	I have been able to improve the latency by upgrading the firmware
> to the newest release (wow, they even have a firmware updating utility
> for Linux!).
>
> -Yenya
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