Re: Slow disks under linux

[Robin Szemeti]

On Thu, 31 May 2001, Dave Hodgkinson wrote:
> Paul Makepeace <[EMAIL PROTECTED]> writes:
> 
> > I'm trying to duplicate an FS from an oldish 5,400rpm 6GB IDE drive to a new
> > 7,200rpm 61GB IDE drive using the usual cp -ax / /mnt. But it's
> > unbelievably slow -- vmstat 2 is reporting bi/bo around 300!
> 
> What does hdparm have to say?

good point ... many/most linux distros come with all the bells and
whistles for quick HD access turned to 'off'  .. I tripled the transfer
rate on my slaptop by turning DMA and other stuff on ... and it didn;t
explode like the manpage said it might.

another tip is to mount the two IDE devices on seperate controllers ..
seems to improve things sometimes.

-- 
Robin Szemeti                       
                                    
Redpoint Consulting Limited
Real Solutions For A Virtual World