Re: Install and RAID
On Sat, 27 Jan 2001, Glenn McGrath wrote:
> Nathan E Norman wrote:
> > Yeah right, I'm going to build a high performance server on IDE
> > <snicker>
> It is an undisputable fact that IDE gives better performance per $ than
> SCSI. You realise the speed of a drive is primarily dependent on its
> RPM's not its interface (or its pricetag).
Do you realize that the current fastest disks are available only in
SCSI/Fibre channel varients? Show me a 15K RPM IDE..
You realize that the speed of a RAID array is primariy dependent on the
number of spindals and the aggregate bandwidth available from each disk?
Show me your fastest IDE based RAID and I'll show you a 64 drive Fibre
Channel system that eats it for lunch :>
Nathan did say high performance, not cheap.
> Ever seen a hardware raid card with as much power as a cpu ?
> If you worried about overloading you system get a MP mobo.
Yes actually :> My new employeer: http://www.yottayotta.com
These cards have more MIPs, RAM and bandwidth than small servers..
especially when they are clustered ...
Software RAID is a bit of a win on small scale, unmanaged RAID systems
that need to be low cost. Dedicated RAID controllers dominate everything
else.
Here is a big hint for you, Linux doesn't even have an enclosure
management driver to go along with the software RAID stuff, making it
impossible to use Linux in conjunction with a JBOD enclosure and be able
to hot swap drives.
Jason
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