On 2002-10-25 07:28 +0000, Mathieu Arnold wrote:
> Hi
> 
> I was twiddling with my yesterday's current, I was trying to make release
> to see how things were going, and I saw at the top of UPDATING that :
> 
>         In addition, IDE write caching is currently disabled by default
>         due to on-going concerns about disk write order and file system
>         integrity.  Re-enabling write caching can substantially improve
>         performance.
> 

This part of the performance disclaimer has been untrue for a while now.
It is once again enabled by default.

> I looked at ata(4), told me about hw.ata.wc, which was supposed to be
> enabled by default, and it was, so, my question is, is the comment above
> still true, and how do I enable write cache if it is, if it's not true any
> more, maybe it should be removed.
> 

As stated, it's untrue. You can check the status of write caching by
using the sysctl(8) facility. You're looking for hw.ata.wc.

It'd probably be a good idea for someone to nuke that paragraph...

-- 
Munish Chopra

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