Ubuntu's performance : how to speed up ?

[Jérôme Tytgat]

I can confirm and more !!!

on my mobo (Asus P4C800-E Deluxe), I have one promise chipset
which can handle RAID-0, RAID-1, RAID-0+1 and MultiRAID and
one intel chipset ICH5R which can handle RAID-0 and RAID-1.

Using RAID-0 on the intel ICH5R have several interesting points :
- speed of RAID-0 stripping
- low cpu utilization (3% against 10-20% for the promise)
- more BUS bandwith as the intel chipset is directly on
the southbridge and the promise chipset is on the PCI
bus (you gain twice the BW of PCI BUS which is around
120-133 Mbits/s)
- No PCI sharing with other PCI cards like Network card.

A must and worth the price !!

some interesting URL :
HOWTO raid0 : http://www.techsupportforum.com/showthread.php?t=12119
HOWTO raid-ready (one disk) : http://www.techsupportforum.com/showthread.php?s=&threadid=9888&forumid=87

promise vs ich5r : http://www.xbitlabs.com/articles/mainboards/print/msi-875p-neo.html
"IDE RAID: Intel vs. Promise"

perf ich5r/nf3/via : http://www.tbreak.com/reviews/article.php?cat=storage&id=291&pagenumber=3


Vincent Trouilliez a écrit :
>>You can also bundle two HDDs in "hardware" RAID-0 configuration to get
>>about twice the peformance of a single HDD system.
>>In RAID-0, for example, when you want to save a 10meg file, half of it
>>will be stored on one of the disks and the other half on the other
>>one, simultaneously, so you double the peformance. This is also the
>>case for reads.
> 
> 
> Wow, didn't think of that ! Does anyone use this setup ? Can you confirm
> the figures ?? :o)
> Jeez, if I buy two cheap IDE Seagate drives, 80MBps each, 160MB per
> second total, wow... :o))))
> 
> But Hardware raid is requires a controller car, no ? That must be
> expensive ! Much cheaper than SCSI RAID, but still epxensive no ?
> Can't we just use software raid ?? 
> 
> My IDE controllers are ATA 100, so I would have to put the two IDE
> drives as Master on their own IDE controller, otherwise bandwidth will
> be limited to only 100MBps by the IDE controller..............
> 
> Vince
> 
>