Re: odd behaviour with harddisk

[Alvin Oga <aoga@Maggie.Linux-Consulting.com>]

hi ya

On Tue, 19 Nov 2002, Mike Dresser wrote:

> On Tue, 19 Nov 2002, Alvin Oga wrote:
> 
> > -- any system ... no matter how fast/slow, is working well
> >    if the ( buffered disk reads ) timing is at least 50% of the rated disk
> >    speed  of 66MB or 100MB or 133MB  or rated sata 160MB  or rated scsi
> >    speeds
> > 	- have not see any system achive full-rated-disk-tranfers
> Isn't this strongly dependent on the disk drive subsystem, not just the
> controller?

its more dependent on the motherboard ( onboard ide controller chips )

- same disk will under-perform by 1/2 or more if a slow/bad ide driver on
  the "bad" mb
	- all else staying the same/unchanged

	- don't get cheap mb... :-)


- other variables like cpu/memory ( cas timing )
        - adding more memory didnt make the system compile any faster
        - adding faster cpu didnt make the system compile any faster

        ( compile 2.4.19 was the test --- 5-6 minutes on average 
        ( for p4-1.6 or p4-2.0 w/ 512MB - pc133 and/or
	( amd-1700+ w/ 512MB PC-2100 ddr  -- keeps up with a p4 system

c ya
alvin