Re: performance limitations of linux raid

[Christopher E. Brown]

On Wed, 3 May 2000, Michael Robinton wrote:

> The primary limitation is probably the rotational speed of the disks and 
> how fast you can rip data off the drives. For instance, the big IBM 
> drives (20 - 40 gigs) have a limitation of about 27mbs for both the 7200 
> and 10k rpm models. The Drives to come will have to make trade-offs 
> between density and speed, as the technology's in the works have upper 
> constraints on one or the other. So... given enough controllers (either 
> scsii on disk or ide individual) the limit will be related to the 
> bandwidth of the disk interface rather than the speed of the processor 
> it's talking too.


        Not entirely, there is a fair bit more CPU overhead running an
IDE bus than a proper SCSI one.

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