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Re: Linux and logical disks...

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Alan Hodgson (im@witzend.nu)
Thu, 7 Jan 1999 11:50:09 -0800

On Thu, Jan 07, 1999 at 10:36:55AM -0800, Russell Krywolt wrote:
>
> I've been hunting for a little info on Linux supporting logical disks,
> but haven't found any yet....can anyone point me in the right direction?
>
> By "logical" disk, I mean that you can have many disk drives that just
> look like one to Linux. ie: if I have 4 4GB drives, Linux would think
> I had one 16GB drive.
>
> Any help would be (by defenition) helpful.

Check out the MD RAID tools. They support RAID0-5 in software and
work on odd-sized drives, etc. You need md and the md personality
support compiled into the kernel (or moduleS) and the md tools installed.
All of these install by default with RedHat 5.1 and 5.2 at least.
There's a mini-howto on Software-RAID you should read.

For much faster RAID 5 you can check out DPT's hardware RAID controllers
(with excellent Linux drivers). 

-- 
There are only a few clues to go around, and the Internet is growing
geometrically.  I leave the math to you. - Scott Bradner

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