[OpenAFS] Speed of AFS, continue...

[Ben Staffin]

* Mike Fedyk <mfedyk@matchmail.com> [2005-03-18 17:26] wibbled:
> ted creedon wrote:
> 
> >On a test server:
> >1. Play with the hdparm utility - there are some cryptic settings and
> >performance tests. Use 32 bit transfers (sometimes the OS resets to PIO/16
> >bits on bootup).
> > 
> >
> I would not recommend this.  If the controller and hard drive are DMA 
> capable, IDE DMA is enabled in the kernel, and it is still not using DMA 
> there might be a compatibility problem between the controller and disk.  
> Look in your dmesg output for a line with "blacklist" or something similar.
> 
> Getting a PCI IDE card is probably your best bet.

I tend to agree, but it's usually worth a shot to try something simple
like 'hdparm -c1 -d1 /dev/hda', and perhaps -m16 if it is not already
set that way.  If the machine blows up in your face, then well... don't
do that again.

-- 
/--
| Ben Staffin
  perpetual nerd  |
                --/