[ILUG] Hardware and Software raid

[Albert White - SUN Ireland]

Hi,

> On Wed, Jul 10, 2002 at 02:45:51PM +0100, Matthew French mentioned:
> > I presume that I need to run controller specific software to create a
> > hardware raid device. So if I ran mkraid, this would make it a software raid
> > device? This is on a Sun Ultra 3000, and I did not check the available
> > hardware before wiping off Solaris.
Perhaps I'm missing the point, but you cant really just run some software and 
expect hardware raid to be there. The hardware either has raid built in or it 
dosent.
AFAIK the E3000 dosent have hardware raid, but Solaris now ships with 
Disksuite for software raid, free (as in beer) download also.

>  Sun never do hardware raid. 
Well there are storage devices that Sun sell that do, the T3 array for example.

Right better mention something about linux I suppose :)  Veritas Volume 
manager is another software raid product that is now available for Linux 
though I've heard nothing about it. It works fine on Solaris though :)

valen at tuatha.org said:
> Stick with RAID 1+0. Your only man, when you have lots of cash.
Depends on what you want I guess. If you know what the disk is for and you can 
set up that environment then try setting up basic striping and mirroring, 
striped mirrors and raid5 and see which suits your application and budget 
best. If you have lots of disks and your application is realtivly small then 
1+0 might be the way to go, if you need the BIG disk but want some redundancy 
then reaid 5 might suit best...

Cheers,
~Al

-- 
Expressed in this posting are my opinions.  They are in no way related
to opinions held by my employer, Sun Microsystems.
Statements on Sun products included here are not gospel and may
be fiction rather than truth.